43 results about "Co2 partial pressure" patented technology

The invention discloses a gas reservoir carbon dioxide burying amount calculation method considering pore expansion and component effects, and belongs to the technical field of carbon dioxide sequestration. The method comprehensively considers a pore expansion effect caused by CO2 injection, and establishes a pore expansion model by introducing a porosity pressure sensitivity coefficient; the pore expansion effect caused by the increase of the fluid pressure is effectively represented, so that the CO2 burying potential of the gas reservoir is more accurately evaluated. And secondly, a Peng-Robinson state equation is adopted, the thermodynamic interaction between CO2 and residual CH4 is considered, and the property change of the mixed gas is accurately represented. According to the method, the defect that a CO2-CH4 system is simplified into single-component gas when gas properties are calculated in an existing method is overcome, the calculation error of the CO2 structure burying amount caused by simplification is avoided, and meanwhile, the calculation error of the dissolved CO2 burying amount is reduced due to the fact that CO2 partial pressure calculation is more accurate.

The invention discloses a typhoon influence distinguishing method and system based on seawater CO2 partial pressure data, and the method comprises the steps: obtaining sea area situation monitoring data in a target sea area typhoon transit period through a multi-source observation platform, and constructing a standardized data set and a climate state background field; a DBSCAN clustering algorithm is adopted to perform water mass division, and the typhoon characteristic water mass distribution is determined in combination with a Manchester-HuitiniU test and correlation analysis. And calculating a seawater carbon dioxide partial pressure abnormal field based on the climate state background field, constructing a typhoon influence index sequential sequence, identifying a core influence area, and generating a typhoon influence trace path. And then seawater carbon dioxide partial pressure grid point reconstruction is carried out, and a typhoon influence space map is constructed. And finally, analyzing space-time change of carbon dioxide flux of air-sea, evaluating carbon sink stability, and generating a typhoon-carbon sink sensitivity zoning map. Seawater carbon dioxide partial pressure is used as a core index, limitation of a traditional method is overcome, and reliable technical support is provided for typhoon marine environment influence assessment.

A polyhydric alcohol amine absorbent suitable for a CO2 capture process from a flue gas with a low CO2 partial pressure, which takes continuous operation stability and safety into account. The polyhydric alcohol amine absorbent comprises the following main components: a main absorbent, an auxiliary absorbent, an antioxidant, a corrosion inhibitor and water, and the concentration of the absorbent is 22-58% by mass fraction, wherein the main absorbent comprises one or two of diethylenetriamine, N,N-diethylethanolamine and hydroxyethyl ethylenediamine; the auxiliary absorbent comprises one or two of monoethanolamine, 2-amino-2-methyl-1,3-propanediol, 2-amino-2-ethyl-1,3-propanediol and 2-amino-2-methyl-1-propanol; the antioxidant comprises one or two of butanone oxime, acetoxime, hydrazine carbonate and ammonium sulfite; the corrosion inhibitor is sodium vanadate; and the balance is desalinated water.

This invention discloses a CO2 direct air capture system and method for increasing CO2 partial pressure. The system includes a first air pump, a second air pump, a microbial fuel cell device, a CO2 capture device, a rich liquid desorption unit, and a CO2 storage unit. The microbial fuel cell device includes a reactor housing, a proton exchange membrane, wires, and external circuitry. The first air pump is located outside the microbial fuel cell device and pumps ambient air into the cathode chamber. A jacket is provided outside the reactor housing to enclose the reactor housing. The CO2 capture device is a sealed housing with a liquid inlet, a liquid outlet, an air inlet, and an air outlet. The air outlet of the cathode chamber of the microbial fuel cell device is connected to the air inlet of the CO2 capture device via a pipe, and a second air pump is installed on the pipe. The rich liquid desorption unit includes a battery waste heat heating device and an electrically heated desorber. The CO2 storage unit includes a CO2 compressor and a CO2 storage container.

The invention discloses a CO2 phase change absorbent based on N-formylmorpholine as well as a preparation method and application thereof, and belongs to the technical field of gas separation. The CO2 phase change absorbent based on N-formylmorpholine is prepared from the following components in percentage by mass: 30 to 40 percent of hydroxyethyl ethylenediamine, 30 to 40 percent of N-formylmorpholine and 27 to 37 percent of water, or 35% of compound amine composed of hydroxyethyl ethylenediamine and N-methylethylamine, 40% of N-formylmorpholine and 25% of water are contained. The preparation method of the CO2 phase change absorbent comprises the following steps: preparing the components in proportion, and uniformly mixing to obtain the CO2 phase change absorbent. The CO2 phase change absorbent is suitable for carbon capture of mixed gas with CO2 partial pressure of 10-20 kPa. The CO2 phase change absorbent can effectively reduce the volatility of the phase change absorbent and the CO2 enrichment phase viscosity, and has a good industrial application prospect.

The application discloses a suspension calcining system with a CO2 partial pressure reduction function and a method for preparing high-activity lime, and belongs to the technical field of lime stone calcination. The system comprises a pretreatment unit, a calcining unit, a cooling unit, a dust removal unit, a CO2 treatment unit and a product bin. The steps for preparing high-activity lime are as follows: after crushing the lime stone raw ore, the lime stone powder is added into a lime stone powder feeding bin, is fed into a cyclone preheater for three-stage preheating, is added into a suspension calcining furnace for calcination, air is introduced into the bottom of the calcining furnace during the calcination process, and the powder is ensured to be in a suspension state at all times; the powder after the calcination is sent into a cyclone cooler for three-stage cooling, and high-activity lime is obtained. In the process of preparing high-activity lime, the powder is heated more uniformly, the heat transfer efficiency is higher, the flowing gas timely discharges the CO2 generated by the decomposition, the CO2 treatment equipment is used for separation, the lime stone decomposition is moved to a positive direction, the decomposition speed is accelerated, and the decomposition efficiency is improved.

An oxygenerator (4) has a blood side (2), a gas side (6) and a semi-permeable membrane (8), where the membrane (8) separates the blood side (2) from the gas side (6), the blood side (2) has an inlet (18) and an outlet (20), the gas side (6) has an inlet (14) and an outlet (16), and during operation of the oxygenerator (4), the gas side (6) has an inlet (14) and an outlet (16). A flow of gas flows into the inlet (14) to the outlet (16) at a gas flow rate and a flow of blood flows into the inlet (18) to the outlet (20) at a blood flow rate, where gas flowing into the inlet (14) of the gas side (6) and blood flowing into the inlet (18) of the blood side (2) flow along the membrane (8) in the same direction to their respective outlets (16, 20).

This invention discloses a method and system for differentiating typhoon impacts based on seawater CO2 partial pressure data. The method includes: acquiring marine situation monitoring data during typhoon passage in the target sea area through a multi-source observation platform, constructing a standardized dataset and a climatological background field; using the DBSCAN clustering algorithm to segment water masses, and combining the Man-Whitney U test and correlation analysis to determine the distribution of characteristic typhoon water masses; calculating the seawater CO2 partial pressure anomaly field based on the climatological background field, constructing a typhoon impact index time series, identifying the core impact area, and generating typhoon impact trace paths; subsequently reconstructing seawater CO2 partial pressure grid points, and constructing a spatial map of typhoon impacts; finally, analyzing the spatiotemporal changes in air-sea CO2 flux, assessing carbon sink stability, and generating a typhoon-carbon sink sensitivity zoning map. Using seawater CO2 partial pressure as the core indicator, this method overcomes the limitations of traditional methods and provides reliable technical support for assessing the marine environmental impact of typhoons.

The invention discloses a ventilation flow field test method for a manned spacecraft assembly, which comprises the following steps of: constructing a tested spacecraft assembly by using a small scale cabin instead of a plurality of real cabins, simulating a ventilation relationship between the tested cabin and an actual spacecraft assembly formed by the plurality of real cabins, and testing the ventilation flow field by using CO2 as a subject matter of a ventilation flow field test. Setting modes of the CO2 metabolism simulation device, the CO2 removal device and the CO2 sensor in the tested spacecraft assembly are determined respectively, and the transportation capacity of the ventilation system is verified by monitoring CO2 partial pressure in the tested spacecraft assembly under different ventilation flow field test working conditions. According to the method, on the premise of not changing the effectiveness and coverage of the ventilation flow field test of the manned spacecraft assembly, the scale and cost of the whole test system are remarkably reduced, the test period is shortened, and the reliability of the test system is ensured.

This invention relates to the field of rolled steel pipe processing, specifically a method for manufacturing a stainless steel cooling pipe. The stainless steel cooling pipe is grade 022Cr17Ni12Mo2, with the following chemical composition by weight percentage: C 0.010~0.020, Si<0.50, Mn<2.00, Cr 16.50~17.50, Ni 10.50~11.50, Mo 2.00~3.00, S<0.015, P<0.030. A typical specification is Φ25×2mm. The manufacturing method includes: (i) billet manufacturing; (ii) hot extrusion; (iii) cold rolling; (iv) heat treatment; (v) straightening; and (vi) surface treatment. The finished tube has a low-temperature elongation of ≥50% (0℃), an inner surface roughness Ra≤0.8μm, an outer surface roughness of 6.3μm>Ra≥3.2μm, a uniform microstructure, a grain size of 5~6 grade, and a thermal conductivity ≥17.6 W(m·K). ‑1 (0℃), carbon dioxide corrosion rate <0.05 mm / a (CO2 partial pressure 0.1MPa).

The present invention relates to a sensor for transcutaneous determination of arterial CO2 partial pressure using luminescence and a method for transcutaneous determination of arterial CO2 partial pressure using luminescence.

The invention discloses a preparation method of environment-friendly mineral powder blended cement, and relates to the technical field of building materials. Abundant carbonation active sites are generated on the surface of mineral powder through the synergistic effect of CO2 partial pressure reaction grinding and gradient thermal activation, the crystal structure of the mineral powder is changed, a sufficient reaction basis is provided for a subsequent hydration reaction, and the mineral powder blended cement is prepared. The temperature-sensitive phase change microcapsules in the composite activator release Ca < 2 + > when cement is hydrated and heated to 45 DEG C, the Ca < 2 + >, the nano geopolymer precursor and the basic magnesium sulfate whiskers act together to induce to generate hydration products of carbonated datolite and magnesium silicate gel, and the products are interwoven to form a compact network structure, so that the temperature-sensitive phase change microcapsules in the composite activator can be used for preparing the composite activator. The internal binding force of the set cement is enhanced, and the pore structure is optimized, so that the cement has excellent mechanical property and durability.

The invention discloses a method for reducing formation of carbon deposition in integration of CO2 capture and methane dry reforming, and particularly relates to a method for reducing carbon deposition in the integration process of CO2 capture and methane dry reforming by using a Ni / CaO-Al2O3 material. According to the method, the reaction time of the conversion stage in the circulation process is regulated and controlled, and the appropriate CO2 partial pressure is maintained so as to promote the methane dry reforming reaction and inhibit complete cracking of CH4. By comparing the carbon deposition amount of each cycle at different conversion times, the result shows that the generation of carbon deposition can be obviously reduced by shortening the reaction time. According to the method, the problems of material inactivation and reactor blockage caused by carbon deposition are effectively solved, the synthesis gas yield is remarkably improved, and a high-stability solution is provided for industrial application of an ICCU-DRM system.

The application discloses a CO2 information prediction method and device in a bioreactor, a storage medium and an electronic device. The method comprises the following steps: obtaining influence parameters of CO2 in the bioreactor, wherein the influence parameters comprise one or more of the following: a CO2 input rate, O2 concentration information in the bioreactor, an O2 input rate, an air input rate, a PH adjusting material input rate and a preset metabolite generation rate in a biological reaction process; performing CO2 concentration prediction based on the influence parameters of CO2 in the bioreactor by using a pre-created CO2 prediction model to obtain CO2 concentration information of the bioreactor; and determining CO2 partial pressure information of the bioreactor based on the CO2 concentration information of the bioreactor. By setting the CO2 prediction model, the influence parameters of CO2 in the bioreactor are predicted and processed, and the prediction efficiency and prediction accuracy of the CO2 information can be improved.

The application belongs to the technical field of cell culture equipment, and provides a high-low pressure cell culture device, which comprises a device box, a device cover movably installed on the device box, a high-pressure device cover and a low-pressure device cover, a plurality of sieve-shaped partitions for placing cell culture dishes and detachably arranged in the device box, and a first air inlet and exhaust pipe installed on the sidewall of the device box, and further comprises a pressure regulating mechanism, which comprises a pressure regulating box, a driving assembly, a first adjusting part, a fixing part, a second adjusting part and a second connecting part. The high-low pressure cell culture device can control the gas pressure in the device through the pressure regulating mechanism, completely separates the CO2 partial pressure control and temperature control of the device from the device, controls the CO2 partial pressure and temperature in the device under different pressures by controlling the CO2 concentration and ambient temperature in the high-pressure gas source, and makes the device structure simpler and the operation more convenient.

An apparatus (1) for determining a CO2 partial pressure value of a blood side (2) of an oxygenator (4) comprises: the oxygenator (4) having a blood side (2), a gas side (6) and a semi-permeable membrane (8), wherein the membrane (8) separates the blood side (2) from the gas side (6), the gas side (6) has an inlet (14) and an outlet (16), and, during operation of the oxygenator (4), a gas flow flows into the inlet (14) to the outlet (16) at a flow rate; a first sensor (10) configured to measure CO2 partial pressure values of the gas side (6); a control unit (12) configured to process the measured CO2 partial pressure values of the gas side (6) and to determine a CO2 partial pressure value of the blood side (2) based on the measured CO2 partial pressure values of the gas side (6), wherein the control unit (12) determines the CO2 partial pressure value of the blood side (2) by calculating a rate of change of the measured CO2 partial pressure values of the gas side (6) during operation of the oxygenator (4), and, when or after the calculated rate of change equals a predetermined rate of change value or falls within a predetermined rate of change range at a predetermined measurement interval, derives the CO2 partial pressure value of the blood side (2) from the CO2 partial pressure value of the gas side (6) measured when or after the calculated rate of change equals the predetermined rate of change value or falls within the predetermined rate of change range.

Device for determination of a CO2 partial pressure value on a blood side of an oxygenator having an oxygenator with a blood side, a gas side and a semipermeable membrane, wherein the membrane separates the blood side from the gas side, the gas side has an inlet and an outlet and, during operation of the oxygenator, a gas flow flows into the inlet to the outlet at a flow rate. The device also has a first sensor configured to measure CO2 partial pressure values of the gas side and a control unit configured to process the measured CO2 partial pressure values of the gas side and to determine a CO2 partial pressure value on the blood side based on the measured CO2 partial pressure values of the gas side. The control unit determines the CO2 partial pressure value on the blood side during operation of the oxygenator.

The invention belongs to the technical field of genetic engineering, and particularly relates to a method for improving carbon dioxide immobilization and conversion performance of genetic engineering escherichia coli. According to the invention, an adaptive evolutionary strategy based on cooperation of gradient carbon source limitation and CO2 partial pressure regulation designed on the basis of genetically engineered bacteria is adopted; gradient carbon source limitation is to gradually reduce the proportion of an external carbon source LB in an M9 culture medium so as to weaken the dependence of strains on exogenous organic carbon; cO2 partial pressure regulation is characterized in that CO2 partial pressure is synchronously increased in a gradient carbon source limiting process, and carbon flux is promoted to flow to an autotrophic module reductive glycine path by enhancing thermodynamic driving force of carboxylation reaction. According to the invention, autotrophic growth verification and metabolic dependency verification are carried out on the obtained adaptive evolution strain, which proves that the initial genetically engineered bacterium has been converted from autotrophic growth to heterotrophic growth after adaptive evolution, and can take CO2 and formic acid as the unique carbon source and energy.

The application provides a method for selectively separating lithium and impurities by multi-stage gradient carbon dioxide back extraction, comprising the following steps: subjecting a lithium-containing organic phase to N-stage carbon dioxide back extraction, wherein N>=2; in the N-stage carbon dioxide back extraction, the partial pressure of carbon dioxide is increased step by step; collecting lithium-containing back extraction liquid obtained by first-stage carbon dioxide back extraction; collecting impurity-containing back extraction liquid generated in stages other than the first-stage carbon dioxide back extraction, and subjecting the impurity-containing back extraction liquid to impurity removal treatment or recycling extraction and back extraction. The method for selectively separating lithium and impurities by multi-stage gradient carbon dioxide back extraction can directly obtain lithium bicarbonate solution with higher purity by designing gradient CO2 partial pressure in carbon dioxide back extraction, and most of the calcium, magnesium and other impurities are retained in subsequent stages, so that lithium bicarbonate solution with a purity of greater than or equal to 95% is obtained, and the amount of impurity removal agent can be greatly reduced when the impurity-containing back extraction liquid obtained subsequently is deeply removed.

The invention relates to the technical field of feed additives, in particular to a sustained-release feed additive containing eucalyptus globulus essential oil for rumens of cattle and sheep. The CO2-triggered eucalyptus globulus essential oil sustained-release capsule comprises a CO2-triggered eucalyptus globulus essential oil microcapsule unit, a cobalt acetate sustained-release microsphere unit and a carrier unit. Wherein the microcapsule unit is of a three-layer core-shell structure and can respond to CO2 partial pressure in the rumen gas production peak period to achieve pulse type rapid release of eucalyptus globulus essential oil, and methanogens are accurately inhibited; the sustained-release microsphere unit adopts functionalized polysaccharide composite microspheres to load cobalt acetate, can stably release cobalt element in rumen, and slowly and continuously releases cobalt element in abomasum and intestinal tract after passing the rumen. The two parts are compounded in a physical mode and do not interfere with each other, and space-time precise delivery and function coordination at different parts of the digestive tract are achieved. The method can effectively improve the methane emission reduction efficiency, improve rumen fermentation and improve the nutrient digestibility of the feed.

Herein discussed is a method of carbon capture comprising providing a reactor having an anode, a cathode, and an electrolyte between and in contact with the anode and the cathode, wherein the electrolyte conducts oxide ions and electrons; introducing a carbonaceous gas to the anode; introducing steam and hydrogen (H2) or carbon dioxide (CO2) and carbon monoxide (CO) to the cathode, wherein steam or CO2 is the dominant component; producing carbon dioxide (CO2) at the anode, wherein the CO2 partial pressure is greater than 18 kPa in the anode exhaust; and producing H2 or CO or both at the cathode. In an embodiment, the anode exhaust has a pressure of from 1 atm to 5 atm. In an embodiment, the CO2 content in the anode exhaust is from 20vol% to 100vol%.

A process for preparing hydrocarbons includes providing a feed stream comprising H2, CO, and CO2; contacting the feed stream with an iron-based FT catalyst under conditions to form a product stream comprising C5+ hydrocarbons and CO; and recycling at least a portion of the CO of the product stream to the feed stream, wherein the feed stream has a H2 partial pressure expressed in bars (i.e., PH2), a CO2 partial pressure expressed in bars (i.e., PCO2), and a CO partial pressure expressed in bars (i.e., PCO) such that a value X as defined by the equation X = -80.9156 + 0.6891[PH2] + 79.6799[PCO2 / (PCO + PCO2)] + 42.3173[PH2 / (2PCO + 3PCO2)] is at least 0; on a plot of [PCO / PCO2] vs. [PH2 / (PCO + PCO2)], the point ([PH2 / (PCO + PCO2)], [PCO / PCO2]) is above the line [PCO / PCO2] = 0.16[PH2 / (PCO + PCO2)]; a ratio of [PCO / PCO2] is no greater than 1; and a ratio of [PH2 / (PCO + PCO2)] is no greater than 3.

To provide a CO2 adsorption system which can be downsized, and can be suppressed in a decline in a CO2 adsorption amount due to zeolite, although moisture is not removed from CO2-containing gas as pretreatment, in cases where CO2 partial pressure in the CO2-containing gas is low, and to provide a CO2 adsorption method.SOLUTION: A CO2 adsorption system 10 is provided, comprising: adsorption towers 21, 22 filled with zeolite; a CO2-containing gas supply line 31 supplying CO2-containing gas G1 to the adsorption towers 21, 22; a compressor 41 provided in the CO2-containing gas supply line 31; a product gas extracting line 32 extracting product gas G2 from the CO2-containing gas G1; and a pressure control section 72 controlling the compressor 41 in such a manner that CO2 partial pressure in the CO2-containing gas G1 becomes 0.001 kPa or more and less than 100kPa. In the adsorption system, a moisture adsorption rate of zeolite is 5 wt.% in an environment of temperature 25°C and relative water vapor pressure 0.5.SELECTED DRAWING: Figure 1

The invention discloses a preparation method of a high-adsorption-capacity and high-strength LSX molecular sieve under low partial pressure of carbon dioxide, and belongs to the technical field of molecular sieve preparation. The preparation method of the high-adsorption-capacity and high-strength LSX molecular sieve under the low partial pressure of carbon dioxide comprises the following steps: supplementing water or a colloidal solution into LSX molecular sieve granulation molding waste, mixing and shaping to obtain an LSX molecular sieve granulation sample; and sequentially carrying out roasting and crystallization treatment on the LSX molecular sieve granulation sample to obtain the LSX molecular sieve with high adsorption capacity and high strength under the CO2 low partial pressure. Compared with a molecular sieve product prepared by a traditional production process, the product prepared by the method disclosed by the invention is high in compressive strength, low in abrasion and high in CO2 adsorption capacity under low CO2 partial pressure (2.5-5torr).

The present invention relates to the consideration of CO 2 A method for evaluating wellbore integrity based on the changes in casing size and cement sheath performance after corrosion, which includes: 2 Before dynamic corrosion, the mechanical parameters of cement paste were measured, and corrosion experiments were carried out according to the preset corrosion time. Nanoindentation experiments were carried out in the corrosion area of ​​cement paste to calculate the elastic modulus and Poisson's ratio of the test material. E r ; Upgrade the elastic modulus and Poisson's ratio parameters of micro / nano scale to macro scale; clean and dry the corroded casing coupons, weigh them to get the mass of the corroded coupons, calculate the corrosion rate, and establish the corrosion rate of casing pipes under the influence of temperature and CO2 partial pressure over time; respectively establish the corrosion rate of casing pipes under the influence of temperature and CO2 partial pressure 2 A mathematical model for the change of elastic modulus and Poisson's ratio of cement paste with corrosion time under the influence of partial pressure factors; a mechanical model of the assembly is established; and the failure form of the wellbore integrity is judged based on the numerical simulation results. The present invention realizes the prediction and evaluation of the integrity of CCUS wellbore under corrosion conditions.

The invention discloses a preparation method of low-sulfate rare earth carbonate, which comprises the following steps: carrying out continuous precipitation reaction on a rare earth sulfate solution and a magnesium bicarbonate solution, and controlling CO2 partial pressure and pH value in the continuous precipitation reaction process to obtain a precipitation product; and carrying out solid-liquid separation and washing treatment on the precipitation product to obtain rare earth carbonate with low sulfate radicals. A rare earth sulfate solution is used as a raw material solution, a magnesium bicarbonate solution is used as a precipitator, rare earth sulfate and the magnesium bicarbonate solution are subjected to a continuous precipitation reaction, CO2 partial pressure and pH value in the reaction process are controlled, a precipitation product is subjected to solid-liquid separation and washing, and rare earth carbonate with low sulfate radicals is obtained. The method has the advantages of no ammonia nitrogen pollution residue, cyclic utilization and zero emission of magnesium salt, cyclic utilization of CO2 gas, low sulfate radical impurity content of the rare earth carbonate product and the like.

The invention discloses an intelligent enrichment and separation system for low-concentration CO2. The intelligent enrichment and separation system comprises a gas enrichment and separation module, a gas conveying and storage module, a gas data sensing and transmission module and an intelligent control module. The gas enrichment and separation module comprises a CO2 enrichment module, a CO2 separation module and a sealing device, enrichment and separation of CO2 in environmental gas are completed through a specified gas selective adsorption type molecular sieve membrane in the module, and the gas conveying and storage module comprises a small cyclone dust collector, a pneumatic pump, a gas conveying pipeline, a CO2 storage tank, a pressure gauge and a safety valve, the gas data sensing and transmission module senses gas signals through the pressure sensor and the CO2 partial pressure sensor and transmits the gas signals to the data processor, the intelligent control module receives the signals of the data processor, the signals are analyzed and processed by the intelligent programmable controller, and the CO2 enrichment and separation process is fed back by controlling the opening and closing degree of the electromagnetic valve. The system is high in intelligent degree, and can automatically complete the enrichment and separation functions of low-concentration CO2.

The invention provides a Bayesian optimization strategy-based method and device for predicting the corrosion rate of an oil casing in formate completion fluid. According to the method, corrosion rate data of the oil casing under different working conditions are collected, and experimental parameters (such as temperature, formate density, CO2 partial pressure, H2S partial pressure and the like) are combined, so that a corrosion rate prediction model based on an XGBoost algorithm is constructed; under a Bayesian optimization framework, modeling is carried out on the relation between the experimental parameters and the corrosion rate by adopting a Gaussian process regression model, and an experimental point with the maximum prediction uncertainty is selected to carry out subsequent experiments; the prediction precision is optimized by iteratively updating the model, so that the optimal corrosion rate prediction is obtained by using the least experiment times; and inputting actual working condition parameters of an on-site oil and gas field by utilizing the trained model, and accurately predicting the corrosion rate of the oil casing. The corrosion rate prediction precision is effectively improved, the experiment cost is reduced, and the corrosion rate prediction method has a wide application prospect.

A method for enhancing long-term compressive strength of a carbonized brick comprises the following steps: uniformly mixing raw materials such as a cementing material, aggregate and water in proportion, and pressing into a green brick; and putting the formed brick blank into a carbonization curing kettle for pre-curing and carbon sequestration curing, taking out the carbonized brick after carbon sequestration curing, cooling to room temperature, putting into a standard curing room for curing, or putting outdoors for regular atomization spraying curing. By controlling the curing conditions after the carbonized bricks are taken out of the kettle, sufficient water is provided, the subsequent hydration capacity of the carbonized bricks is improved, and the compressive strength is continuously enhanced. The carbonization and hydration activities of the carbonized bricks are fully utilized, the compressive strength of the carbonized bricks is continuously improved, the carbon sequestration maintenance period is shortened, and compared with methods for increasing the temperature, CO2 partial pressure and the like in traditional carbon sequestration maintenance, the cost is low, the process is simple, the product performance can be continuously improved, and the product environmental benefits can be improved.

Disclosed is a calcination process for producing high purity CO2 from a solid comprising CaCO3, said process operating cyclically and continuously on a solid arranged in a packed bed or a moving bed, in which each cycle comprises: a first step in which a fuel is combusted in a bed of the solid comprising CaCO3, which is heated to an average temperature of 800 DEG C to 950 DEG C, and a second step in which the fuel is combusted in the bed of the solid comprising CaCO3, which is heated to an average temperature of 800 DEG C to 950 DEG C; and a second step in which pure CO2 is extracted from the solids comprising CaCO3 by applying a CO2 partial pressure variation by feeding steam to the bed. When the method is applied to calcining a continuous flow of limestone in a moving bed shaft kiln, the combustion may be carried out directly with air, oxygen-enriched air, or an O2 / CO2 mixture. The method is also applied to the calcination of CaCO3 formed in a reversible calcium cycle process comprising a carbonation reaction step of forming CaCO3 from CaO.