10results about How to "Low pyrolysis temperature" patented technology

The invention discloses a method for rapidly degrading BPA based on activation of PMS by iron-nitrogen co-doped pomelo peel biochar, and belongs to the field of treatment of emerging organic pollutants in environmental water. The method comprises the following steps: mixing iron-nitrogen co-doped shaddock peel biochar with a BPA solution, performing ultrasonic stirring, adding a PMS stock solution, and performing stirring to degrade BPA; wherein the use amount of the iron and nitrogen co-doped shaddock peel biochar is 0.05 g / L to 0.2 g / L. According to the method, the shaddock peel is used as the biochar, and the prepared iron-nitrogen co-doped shaddock peel biochar catalyst and a PMS catalytic system have efficient, stable and complete degradation capacity on emerging organic pollutants and can be recycled.

The invention relates to the technical field of thermal batteries, in particular to a high-specific-energy long-endurance thermal battery composite positive electrode material and a preparation method and application thereof.The composite positive electrode material is formed by compounding a high-capacity cobalt-based multi-component composite positive electrode material A and a high-conductivity cobalt-based multi-component composite positive electrode material B. Compared with traditional FeS2 and CoS2 positive electrode materials, the composite positive electrode material has the advantages that the specific energy of the composite positive electrode material is greatly improved; the material has the advantages of high pyrolysis temperature, good conductivity and high specific energy, and is suitable for high-specific-energy long-endurance thermal batteries.

The invention provides a preparation method and application of a core-shell nano oxide boron-carbon-nitrogen-oxygen catalyst for oxidative dehydrogenation of propane, the catalyst takes tetrafluoroborate ionic liquid as a boron source, and a carbon-nitrogen source (cyanamide or a polymer thereof) and a commercially available nano oxide (including but not limited to silicon oxide, aluminum oxide and zirconium oxide) are added into an aqueous solution of the tetrafluoroborate ionic liquid; and uniformly stirring and mixing at a constant temperature in a sealed manner, evaporating water, drying, and finally heating to 550 DEG C in an air atmosphere in a programmed manner for pyrolysis to obtain the core-shell type oxide coated BCNO catalyst. The optimized SiO2 (at) BCNO (the mass percentage of B is 7.5 wt%) has excellent propane oxidative dehydrogenation catalytic activity and propylene selectivity under an oxygen-enriched condition, and is good in stability. The process is easy to control, the universality is high, the pyrolysis temperature is low, special atmosphere protection is not needed, and large-scale preparation is facilitated.

A method for capturing and converting CO2 generated by pyrolysis of waste rubber comprises the following steps: (1) pyrolyzing pretreated waste tires at high temperature to generate gas and solid products; (2) enabling gas generated in the pyrolysis process to sequentially pass through a gas-solid separator and a fractionating tower to obtain a gas-phase component, a gasoline fraction, a diesel fraction and tar; (3) carrying out purification treatment on the gas-phase component through a gas condenser and a selective adsorption unit, removing impurities to obtain a purified gas-phase component, capturing CO2 in the purified gas-phase component by using an organic alcohol amine absorbent, and collecting separated gaseous hydrocarbon; (4) at least 30-50% of the captured CO2 is converted into methanol by a thermocatalytic hydrogenation process; and (5) reinjecting the residual CO2 to the bottom of the pyrolysis reactor. According to the method, the problem of CO2 emission in the prior art is solved, the yield of the light oil product is remarkably improved, and resource utilization of CO2 is realized.

This invention provides a process and equipment for recovering valuable components from cathode carbon blocks using binary molten salt-assisted roasting, relating to the field of solid waste treatment and resource recycling technology. The process includes the following steps: Step S1: The aluminum electrolysis cathode carbon blocks are coarsely crushed using a crusher, then pulverized using a ball mill, sieved, and dried in an oven for later use. Step S2: Analytical grade sodium chloride and carbonate are mixed according to a specific mass ratio. The mixed salt is placed in a muffle furnace and heated for a period of time to form a uniform binary eutectic molten salt. After cooling, it is ground into a fine powder using an agate crucible for later use. This solution ultimately achieves efficient removal of toxic impurities such as fluorides and cyanides from waste cathode carbon blocks in aluminum electrolysis cells and resource recovery of valuable components such as graphite carbon by innovatively employing a sodium chloride-sodium carbonate binary molten salt system assisted by low-temperature roasting, combined with subsequent water leaching and hydrothermal acid leaching treatment steps.

The application provides a preparation and application of an anti-aging starch-based emulsifier, wherein the preparation method comprises five steps of amorphization, oxygen-free pyrolysis, low-temperature gelatinization, centrifugal separation and spray drying; the amorphization and overheated steam treatment are combined, the pyrolysis efficiency and solubility of starch are improved, and browning and peculiar smell are prevented; the starch granules after pyrolysis are subjected to low-temperature gelatinization and centrifugal separation to obtain a soluble starch solution with suitable molecular weight and chain length distribution, and the starch granules form granular molecular clusters in water, adsorb and stabilize the oil-water interface; due to strong adsorption force, the starch molecular clusters are difficult to be widely crosslinked, and the aging of the starch emulsifier is effectively inhibited; the starch-based emulsifier provided by the application has the characteristics of anti-aging and pure naturalness, and is suitable for food, pharmaceutical and other industries.

The invention discloses a microwave pyrolysis treatment device and method for oily sludge. The device comprises an input control system, a microwave pyrolysis system and a product collection system, the input control system is used for inputting inert gas into the microwave pyrolysis system and controlling the microwave pyrolysis process of a microwave generation device in the microwave pyrolysis system; the microwave pyrolysis system comprises a conveying cavity, a conveying mechanism arranged in the conveying cavity in a penetrating mode, a microwave generating device and a container used for being arranged on the conveying mechanism and containing oily sludge solid waste. The microwave generating device is used for performing microwave pyrolysis on the oily sludge solid waste conveyed on the conveying mechanism under the control of the input control system; the inlet end of the product collection system is connected with the outlet end of the microwave pyrolysis system; and the product collection system is used for collecting liquid and / or gas generated and discharged by microwave pyrolysis of the oily sludge solid waste. According to the invention, uniform heating for pyrolysis is realized, the pyrolysis temperature is reduced, the pyrolysis time is shortened, and the heating efficiency is improved.

The invention belongs to the technical field of biomass energy, and particularly relates to a catalyst applied to biomass pyrolysis and a pyrolysis method. The catalyst comprises sodium carbonate and polyferric sulfate. The sodium carbonate and the polyferric sulfate are compounded as the catalyst, so that the pyrolysis temperature of the biomass can be reduced, the pyrolysis rate is increased, and the industrial energy consumption is greatly reduced.

The invention relates to the field of oxygen reduction electrocatalysts, and discloses a hollow carbon nanotube catalyst, a preparation method thereof, a battery and an electric device. According to the preparation method, the reaction time is taken as a variable through a pipe diameter regulation strategy, zinc oxide nano materials with different pipe diameters are prepared by a water bath synthesis method which is easy to reproduce and are used as templates and are attached with ZIF-8, the prepared small-pipe-diameter zinc oxide nanotube is more easily and completely carbonized, zinc ions are volatilized, a hollow carbon nano structure is obtained, a layered network structure is presented, the porosity is high, and the preparation method is simple and convenient. The flux and the purity are high. According to the preparation method, the reaction conditions are defined, the step of removing impurities through acid pickling is reduced, then the product collection amount is increased, and the catalytic activity of the carbon-based catalyst is guaranteed while the material pyrolysis temperature is reduced.

The present invention provides a method for synthesizing a Pt-based ordered intermetallic alloy, and the specific steps are as follows: step 1, uniformly coating a layer of heteroatom-rich coating layer on a carrier to obtain a carrier with a coating layer; step 2, mixing a precursor containing PtM with a carrier with a coating layer, or directly loading disordered PtM alloy particles on a carrier with a coating layer to obtain a precursor catalyst, wherein the M is a transition metal; step 3, pyrolyzing the precursor catalyst under a specific atmosphere to obtain a Pt-based ordered alloy catalyst. The present invention can obtain small-particle-size, highly dispersible PtM ordered intermetallic alloy particles, and at the same time, a coating layer of a certain thickness will not affect the stability of the carrier, and finally taking into account the high activity and high stability of the Pt-based alloy catalyst. The Pt-based ordered alloy catalyst synthesized by this method has application prospects in the field of fuel cell technology.