90 results about "Biogenic gas" patented technology

The present disclosure relates to a carbon dioxide capture apparatus and process combined with biogas upgrading, and there is provided the carbon dioxide capture apparatus combined with biogas upgrading for simultaneously obtaining high purity methane and carbon dioxide, and improving separation efficiency without an additional process by making use of gas streams after a liquefaction process, and recovering cold heat in the process.

The application provides a multi-gas control device, a use method and an application, and relates to the technical field of biological gas fermentation. The device comprises a gas supply module, the gas supply module comprises multiple groups of gas sources and connecting pipelines, each gas source is connected to an air inlet pipeline through a respective connecting pipeline, a secondary pressure reducing valve, a T-shaped filter, a mass flow meter, a stop valve, a regulating valve and a check valve are sequentially arranged on the connecting pipeline, the air inlet pipeline is connected to a liquid circulation pipeline, gas is discharged from a spraying mechanism connected to the liquid circulation pipeline, the spraying mechanism is arranged in a fermentation tank, the spraying mechanism is connected to a circulating pump through the liquid circulation pipeline, the circulating pump is connected to the bottom of the fermentation tank through a pipeline, the top of the fermentation tank is connected to a detection pipeline, and a precision filter, a vacuum pump, a drying device, a pre-analyzer and a gas analyzer are sequentially arranged on the detection pipeline. The application realizes efficient absorption and utilization of multiple gases, and simultaneously obtains high yield and high quality single-cell protein.

A method to produce a halogen-depleted gas is described. The method providing a gas derived from and / or including a source of biogas, mixing said gas with a source of hydrogen to produce a processed gas mixture including an acid, and separating said acid from said processed gas mixture. Sulfur, oxygen, carbon dioxide removal processes are integrated into the method. Production of secondary products, and removal thereof, are included. Pre and post processing may be integrated, and production of products is described.

The present invention provides an integrated plasma catalytic system for biogas conversion comprising a plasma treated mesoporous or microporous catalyst and a plasma source for converting biogas containing methane and carbon dioxide to liquid oxygenates rich in methanol or acetic acid. Biogas from different solid wastes can be converted into liquid oxygenates including methanol and acetic acid under normal temperature and pressure conditions.

Provided is a system that recycles high-concentration organic food wastewater and organic sludge generated during the food waste treatment process within the process itself to increase bio-gas production and minimize process waste. The present invention provides a system for maximizing bio-gas production and minimizing process waste discharge by constructing key facilities, such as anaerobic digesters, dryers, and deodorizing boilers, in a two-stage configuration and integrating these facilities into an interconnected process. By implementing this system, dried materials generated in the dryers, as well as digested slurry and condensed wastewater generated during the treatment process, may be recycled and recovered within the process. As a result, energy costs may be reduced by increasing bio-gas production, by minimizing external discharge of process waste, outsourcing treatment costs may be reduced.

A process for producing a jet fuel fraction (41), said process comprising steps of feeding at least one of a biogas stream (1), a carbon dioxide stream (2), or a methane stream (3), and at least a fraction of a tail gas recycle stream (32), to a reformer section (10) to provide a synthesis gas stream (11); feeding said synthesis gas stream (11, 22) to a synthesis section (30) to provide a stabilized condensate stream (31), a liquid wax stream (38), the tail gas recycle stream (32) and a concentrated oxygenate recycle stream (36); refining at said stabilized condensate stream (31) and liquid wax stream (38) in a refinery section (40) to provide a jet fuel fraction stream (41); and recycling said concentrated oxygenate recycle stream (36) to a biogas plant, and a plant for carrying out the process.

A system for separating carbon dioxide from a biogas stream includes a first pipe and a second pipe extending within the first pipe. A first inlet at a first end of the second pipe receives the biogas stream, and a second inlet at a first end of the first pipe receives a liquid absorbent. The biogas stream is dispensed from the second pipe into the first pipe to mix with the liquid absorbent, separating the carbon dioxide from the biogas stream. A first outlet is in fluid communication with the first pipe to deliver a purified biogas stream. A first end of a third pipe extends from the first pipe and a second end of the third pipe extends into a mixed liquid absorbent stream within the first pipe. A second outlet, in fluid communication with the first end of the third pipe, delivers the mixed liquid absorbent stream.

The application discloses an aerobic-anaerobic bacteria combined coal pretreatment biological gas production device, which comprises a gas blowing system, a bacterial population pre-culturing system, an aerobic-anaerobic biological combined pretreatment and gas production system and a gas-liquid two-phase collection and monitoring system. The application also discloses a gas production method of the gas production device. The application takes coal as a substrate, and under suitable conditions, carries out culture and optimization of a methanogenic bacterial population, and simulates indoor biological gas production effects under different coal rank, bacterial type, combined pretreatment mode, treatment time and metabolic environment conditions. The application adopts an integrated combined processor to combine aerobic bacteria and anaerobic bacteria for pretreating coal, so that coal-based biological gas production can be safely and efficiently carried out, and the application has important environmental benefits and broad application prospect.

A biogas slurry filtering system comprising a first tank configured to receive the biogas slurry to be filtered and a mixing device located in the first tank and configured to aerate the biogas slurry. The filtering system also comprising a filter configured to filter the biogas slurry into digestate and filtrate and a controller that controls operation of the filtering system. The filter comprising a filter head located in the first tank at a height-adjustable position. <Figure 1>

The invention provides three-cavity synergistic microwave pyrolysis equipment based on waste heat recovery and a working method of the three-cavity synergistic microwave pyrolysis equipment, and belongs to the technical field of microwave heating. A drying cavity, a pyrolysis cavity and a cooling cavity which are longitudinally and vertically distributed are adopted in the equipment and communicate with one another through oppositely-opened closing plates driven by air cylinders, and a vertical flow type channel driven by gravity is formed; and the PLC and the touch display module realize dynamic balance of the material flow and the energy flow according to temperature data fed back by the thermocouples in the cavities. The equipment is integrated with a waste heat recovery module, biogas generated by pyrolysis is introduced into a drying cavity heat exchange pipe bundle through a circulating gas path pipe group for indirect heat exchange, then flows back to a circulating water cooling box again for further cooling, and finally enters a gas washing, drying and filtering barrel for gas washing, dehydration and multi-stage filtering, and it is ensured that pyrolysis gas reaches the standard and is discharged. Through three-cavity cooperation and efficient waste heat recovery, the material treatment efficiency and the energy utilization efficiency are improved, and the overall energy consumption of the system is reduced.

A system for processing biogas, the system comprising: a container, a pressure swing adsorption (PSA) unit housed in the container, the PSA unit having: a plurality of beds containing adsorbent material, the adsorbent material configured to selectively adsorb gas species from the biogas to process the biogas, a rotary valve module for distributing flow of 5 the biogas within the PSA unit, an inlet for supplying the biogas to the plurality of beds from outside of the container, and an outlet for transporting the processed biogas away from the PSA unit.

A waste stream of organic matter such as sewage, plant and plastic matter is received for recycling and treated with high temperature and pressure to generate useful organic products such as bio-oil and gas. Byproducts such as char and an aqueous phase including water can be selectively recycled or beingly discarded. An oxidant added to a reactor containing waste from the waste stream facilitates an autothermal reaction under the temperature and pressure applied to the reactor, boosting the temperature slightly from the reactions therein. The reactor generates useful hydrocarbons such as bio-oil resulting from disruption of organic bonds. A combination of oxidation and radical initiation results from the oxidant and / or radical initiators, and provides an increased yield of bio-oil and substantially pure aqueous phase. A stoichiometric quantity of the oxidant limits complete conversion of carbon into carbon dioxide by limiting available oxygen and therefore favoring hydrocarbon formation.

A method to produce a halogen-depleted gas. The method provides a gas derived from and / or including a source of biogas, mixing the gas with a source of hydrogen to produce a processed gas mixture including an acid, and separating the acid from the processed gas mixture. Sulfur, oxygen, carbon dioxide removal processes are integrated into the method. Production of secondary products, and removal thereof, are included. Pre and post processing may be integrated. Also, production of products from the processed gas.

A method for purifying biogas to biomethane, comprising the following successive steps: (a) passing raw biogas through a first buffer tank (Z1) equipped with a demister and an activated‑carbon filter (F1) and compressing the pre‑purified gas in a compressor (C1) to 6-12 bar; (b) raising the temperature of the compressed biogas to 200–300 °C; (c) removing sulphur compounds in one or more desulphurization reactors (R1, R2) filled with a zinc‑oxide (ZnO) sorbent bed at 200–300 °C; (d) cooling the desulphurized gas to 30–40 °C while condensing and removing liquid; (e) upgrading the cooled gas in a two-stage pressure-swing adsorption (PSA) unit (A1–A8) containing sorbents for CO₂, N₂ and O₂, wherein in the first stage (A1–A4) adsorption is carried out at line pressure, producing biomethane with ≥ 98 vol % CH₄, which is forwarded to a gas grid or to a condensate tank (S1), and in the second stage (A5–A8), vacuum pressure‑swing adsorption (vPSA) is performed at (−1) to 25 kPa, the methane‑rich product being recycled to the suction side of the compressor (C1); and (f) catalytically oxidizing the residual methane contained in the PSA off‑gases in a methane-oxidation reactor (R3) using air, oxygen‑enriched air or pure oxygen.

A biogas reforming system includes a desulfurization part configured to remove sulfur components from biogas, a mixed reforming part configured to produce hydrogen (H2) and carbon monoxide (CO) by performing a mixed reforming reaction on methane (CH4) in the biogas, which has passed through the desulfurization part, with steam (H2O) and carbon dioxide (CO2), a hydrogen separation part configured to separate hydrogen (H2) from a reaction product from the mixed reforming part, and a heat supply part configured to supply heat to the mixed reforming part by combusting the reaction product having passed through the hydrogen separation part, and a part of the biogas having passed through the desulfurization part.

A method of processing biogas that includes obtaining a mobile tank containing biogas at a pressure greater than 1000 psig, connecting the mobile tank to a pressure let down system, and depressurizing the mobile tank to remove biogas therein. The depressurization includes removing gas from the mobile tank using the pressure let down system, and introducing a warming gas into the mobile tank.

A vehicle sensing and control assembly includes a sensing system with at least one infrared sensor. The sensing system determines, using data from the at least one infrared sensor, a measure of a concentration of at least one non-hydrocarbon impurity in the biogas. The assembly further includes a control system configured to control a user communication system, based on said measure, to communicate information relevant to the at least one non-hydrocarbon impurity in the biogas to a user of the vehicle; and / or to generate a control signal for adjusting a configuration of the engine. Additionally provided is a fueling assembly with fueling equipment for delivering biogas into a vehicle storage tank assembly of a vehicle, and the vehicle sensing and control assembly. Further provided is a method and a related computer program for operating a vehicle having a combustion engine configured to enable biogas to be used as fuel.

Methods of controlling hydrogen sulfide concentration of a biogas occupying an anaerobic membrane bioreactor (AnMBR) containing a submerged membrane are disclosed herein. Methods of controlling dissolved sulfide concentration of a mixed liquor within the AnMBR are disclosed. The methods include directing wastewater containing sulfur and a chemical oxygen demand (COD) to an AnMBR, withdrawing at least a fraction of the biogas from the AnMBR, directing a pre-determined amount of the withdrawn biogas to a scrubber, directing a remainder of the withdrawn biogas to a gas distributor, and directing the scrubbed biogas to the AnMBR. Systems for treating wastewater having sulfur and COD are disclosed. The systems include an AnMBR, a scouring gas closed loop, a scrubber, and a control mechanism for directing biogas to the scrubber and to a gas distributor. Methods of retrofitting a system for treating wastewater having sulfur and COD are disclosed.

A biogas collection and purification system that includes a plurality of sources of biogas and a network of conduits configured to convey the biogas from the sources to a central processing facility for processing the biogas into methane. The central processing facility removes impurities to convert biogas to biomethane and may include an H2S removal stage; an activated carbon scrubber; a gas drier; and a carbon dioxide removal stage. The facility also has a biomethane gas compressor configured to deliver the biomethane for use in power plants, for CNG production. Ancillaries to the system include fuel cells for direct electricity generation from biogas / biomethane.

The application relates to the technical field of mineral exploration, and in particular to a multi-modal mineral prediction agent cooperation method and system based on LLM dynamic perception. The method comprises the following steps: acquiring surface multi-modal data of a permafrost layer mineral, analyzing the interaction between a surface methane-loving bacterial community structure and permafrost respiration gas in the permafrost layer above the mineral based on the surface multi-modal data, and obtaining a permafrost microorganism-gas coupling information set; based on the permafrost microorganism-gas coupling information set, simulating the migration path of the gas in the heterogeneous permafrost through an LLM generator, associating and mapping the migration path with the mineral type, and obtaining a mineral characteristic inference set; based on the mineral characteristic inference set, positioning the methane seepage and the microbial hotspot area through a discriminator, generating a grid sampling-fixed point deep digging cooperation decision, and outputting a multi-modal mineral prediction agent cooperation log of minimum invasion operation. The balance between accurate target positioning and minimum environmental invasion is achieved, and the reliability of mineral prediction is improved.

The present invention relates to a system for increasing biogas production and minimizing process waste, wherein high-concentration organic food waste water, organic sludge and the like generated in a food waste treatment process are recycled in the process. According to the invention, the anaerobic digestion tank, the dryer, the deodorization furnace and other main devices are constructed into two stages, and the devices are linked and combined at the same time, so that a novel system for recycling and recycling dried materials generated in the dryer and digested slurry, condensed wastewater and the like generated in the treatment process in the process is realized; thus, a system for maximizing the production of biogas and minimizing the discharge of process waste, which can reduce the energy cost along with the increase of biogas production, and minimize the discharge of process waste to reduce the cost of delegated processing, is provided.

This invention discloses a method for identifying the coexistence of hydrates and free gas in block transport sedimentary development zones. By analyzing the impact of new sedimentation on the thickness of the hydrate stability zone, it identifies various contact relationships between hydrates and free gas in sandy strata within block transport sedimentary development zones. Through research including well logging anomaly identification, geological and sedimentary condition analysis, seismic impedance inversion, hydrate stability zone thickness adjustment calculation, BSR identification, and stratigraphic lithology identification, it achieves rapid identification of hydrate-free gas coexistence layers in sandy reservoirs within block transport sedimentary development zones. This provides an understanding of the dynamic hydrocarbon accumulation system of hydrates in rapidly sedimentary development zones, with biogenic gas as the primary gas source. It innovatively explains the coexistence of hydrates and free gas in block transport sedimentary zones, and can reasonably explain the spatial distribution of hydrates and free gas in rapidly sedimentary areas, providing a basis for subsequent exploration and development of hydrate reservoirs.

A plant, in particular a methanol plant, is provided, said plant comprising: a first biomass feed, a biomass digester, arranged to receive the first biomass feed and convert it to a biogas stream, a reformer section arranged to receive at least a portion of the biogas stream from the biomass digester and provide a first synthesis gas stream, a synthesis section, arranged to receive a synthesis gas stream from the reformer section and provide a raw product stream; and a first hydrocarbon-containing off-gas stream, and a distillation section arranged to receive at least a portion of the raw product stream and provide at least an upgraded product stream and a second hydrocarbon-containing off-gas stream. At least a portion of said first and / or at least a portion of said second off-gas stream is arranged to be recycled as additional feed to the biomass digester. A process using said plant is also described.

This invention provides a method for optimizing the uniform gas distribution of an airflow distributor in a biogas-liquid reactor, belonging to the technical field of biogas-liquid reactors. It solves the problem of the lack of a systematic optimization method in existing technologies. The method includes: estimating the critical velocity for seepage at the jet orifices; calculating and initially selecting the required number of jet orifices, the total length and number of all jet pipes, and initially selecting the airflow distributor structure; determining the frictional resistance coefficient f, momentum recovery coefficient k, and jet orifice flow coefficient c; analyzing the pressure drop distribution characteristics along the pipe length and the total pressure loss within the pipe; based on the analysis results, determining the airflow distributor parameter combination that meets the conditions; and outputting the final airflow distributor design parameters when the jet velocity and non-uniformity of each jet orifice simultaneously meet the preset seepage prevention conditions and non-uniformity requirements. This invention achieves optimized design of the airflow distributor structure.

The invention relates to a container (1) having a main body (2), an inner membrane (4) and an outer membrane (5), wherein the inner membrane (4) and the outer membrane (5) are fastened to a main body wall (3) of the main body (2) in a common fastening region (6), and the main body wall (3) and the inner membrane (4) together enclose a gas-receiving cavity (7) having a variable volume for storing and / or generating a gas or gas mixture, in particular biogas, and the outer membrane (5) covers the inner membrane (4) on the side facing away from the gas-receiving cavity (7), wherein the inner membrane (4) and the outer membrane (5) together enclose an intermediate membrane cavity (8) having a variable volume, wherein the container (1) has a sealing membrane (9) which covers the common fastening region (6) on an outer side (10) facing away from the gas-receiving cavity (7) and is fastened to the outer membrane (5) with the interposition and / or formation of a first seal (11) and to the main body wall (3) with the interposition and / or formation of a second seal (12).

The present application relates to the technical field of unconventional oil and gas reservoir effectiveness logging interpretation and evaluation, in particular to a mudstone biogas reservoir effectiveness evaluation system, method, device and medium. The correlation between the sand content index and the shale content is used to establish a shale content calculation model for high shale formation, and the shale content is calculated. This method greatly improves the calculation accuracy of shale content and effectively solves the problems of reservoir leakage and other problems in the process of calculating shale content in the prior art. Then, the shale content is used to calculate the effective porosity, the shale content and the effective porosity are used to calculate the permeability, and the effective porosity and the permeability are used to evaluate the effectiveness of the mudstone biogas reservoir. The shale content and reservoir physical property parameters calculated by the above method have good consistency with core analysis data, can truly reflect the formation conditions, and the evaluation results are more accurate, providing a reliable basis for subsequent oil and gas exploitation. The problem of low accuracy of mudstone biogas reservoir judgment in the prior art is solved.

The invention relates to a method for preparing biogas from a substrate, comprising a step of anaerobic digestion of said substrate in the presence of fermented molasses, the fermented molasses content being between 0.01% and 15% by weight of substrate, to a composition for improving the production of biogas, and to the use of fermented molasses or of a composition for improving the production of biogas as an additive in a method for preparing biogas from a substrate.

The invention belongs to the technical field of biological coal bed gas, and particularly relates to a method for regulating and controlling a co-fermentation anaerobic system to increase yield of biogas. The method comprises the following steps: mixing cyanobacteria liquid, pulverized coal, a methanogenic inorganic salt culture medium and a sludge inoculum to obtain a co-fermentation system; and mixing the bacteriophage enrichment liquid and the Escherichia coli liquid according to a ratio that the infection complex number MOI is 1 or 10, adding the mixture into a co-fermentation system, and culturing under an anaerobic condition until the biogas yield is stable. The T4 bacteriophage is used for accurately regulating and controlling the flora, optimizing the methane production metabolic pathway and remarkably improving the biogas yield, and the T4 bacteriophage has the advantages of being environmentally friendly, low in cost and free of high-energy-consumption equipment or strong acid and strong alkali, and can be used for coal mine biogas yield increase and cyanobacterial bloom resource treatment.

The invention provides a plug flow type fermentation device and an operation method thereof. A plug-flow fermentation device for receiving and fermenting a fermentation material, the plug-flow fermentation device being a biogas plant and comprising a plug-flow fermenter and a stirring device, the stirring device having: a shaft rotatable about an axis of rotation parallel to an axial direction; the plurality of stirring elements comprise a first stirring element, a second stirring element and a third stirring element; wherein the first stirring element is a boundary stirring element located in one of the input region and the discharge region and defining an axial extent of the stirring volume covered by the stirring device; the second stirring element is a stirring element closest to the first stirring element in the axial direction; the third stirring element is a stirring element close to the first stirring element in the axial direction; and in the axial direction, the second stirring element has a maximum width smaller than the maximum width of the first stirring element and larger than the maximum width of the third stirring element.

A method for purifying biogas to biomethane, comprising the following successive steps: (a) passing raw biogas through a first buffer tank (Z1) equipped with a demister and an activated‑carbon filter (F1) and compressing the pre‑purified gas in a compressor (C1) to 6-12 bar; (b) raising the temperature of the compressed biogas to 200–300 °C; (c) removing sulphur compounds in one or more desulphurization reactors (R1, R2) filled with a zinc‑oxide (ZnO) sorbent bed at 200–300 °C; (d) cooling the desulphurized gas to 30–40 °C while condensing and removing liquid; (e) upgrading the cooled gas in a two-stage pressure-swing adsorption (PSA) unit (A1–A8) containing sorbents for CO₂, N₂ and O₂, wherein in the first stage (A1–A4) adsorption is carried out at line pressure, producing biomethane with ≥ 98 vol % CH₄, which is forwarded to a gas grid or to a condensate tank (S1), and in the second stage (A5–A8), vacuum pressure‑swing adsorption (vPSA) is performed at (−1) to 25 kPa, the methane‑rich product being recycled to the suction side of the compressor (C1); and (f) catalytically oxidizing the residual methane contained in the PSA off‑gases in a methane-oxidation reactor (R3) using air, oxygen‑enriched air or pure oxygen.