Abstract: Disclosed is a full temperature range simulated rotated moving pressure swing adsorption (FTrSRMPSA) enhanced reaction hydrogen generation process from a shifted gas. Multiple axial flow fixed bed adsorption reactors placed on a multi-channel rotary valve and ring-shaped rotary tray, and blended and loaded with medium and low-temperature shift catalysts and adsorbents are connected through a pipeline, and rotating directions and rotating speeds of the rotary valve and ring-shaped rotary tray are regulated. Therefore, gases complete mass and heat transfer of respective conversion reaction-adsorption and desorption regeneration steps by constantly coming in and going out of inlets and outlets of adsorption reactors to achieve a simulated rotated moving bed pressure swing adsorption enhanced reaction process. Hydrogen (H2) product gases are directly obtained therefrom, and have the purity and yield of greater than or equal to 99.9-99.99% and 92-95%, respectively. High purity carbon dioxide (CO2) is co-produced.

Abstract: A full temperature range simulated rotated moving bed PSA process for extracting H2 and NH3 from GaN-MOCVD exhaust gas, includes a medium and high temperature PSA ammonia concentration system and an intermediate gas PSA hydrogen purification system, which include multiple axial flow fixed bed adsorption towers arranged in the center of upper and lower two multichannel rotary valves, mounted on the periphery of an annular rotary tray, and connected through pipelines. For the gas flowing through rotary valve channels, pipelines between inlet and outlet ends of the channels and inlet and outlet ends of the adsorption towers, and adsorption bed layers, mass transfer in respective adsorption and desorption steps is completed while the gas entering and exiting the inlets and outlets of the adsorption towers and adsorption bed layers while rotating. Thus, the simulated rotated moving bed PSA process is formed.

Abstract: The present invention discloses methods for extracting and recycling ammonia in MOCVD processes by FTrPSA. Through pretreatment, medium-shallow temperature PSA concentration, condensation and freezing, liquid ammonia vaporization, PSA ammonia extraction, and ammonia gas purification procedures, ammonia-containing exhaust gases from MOCVD processes are purified to meet the electronic-level ammonia gas standard required by the MOCVD processes, so as to implement recycling and reuse of the exhaust gases, where the ammonia gas yield is greater than or equal to 70-85%. The present invention solves the technical problem that atmospheric-pressure or low-pressure ammonia-containing exhaust gases in MOCVD processes cannot be returned to the MOCVD processes for use after being recycled, and fills the gap in green and circular economy development of the LED industry.

Abstract: The present invention discloses methods for extracting and recycling hydrogen in an MOCVD process by FTrPSA. Through pretreatment, fine deamination, PSA hydrogen extraction, deep dehydration and hydrogen purification procedures, ammonia-containing waste hydrogen from an MOCVD process is purified to meet the electronic-level hydrogen (the purity is greater than or equal to 99.99999% v/v) standard required by the MOCVD process, to implement resource reuse of exhaust gases, where the hydrogen yield is greater than or equal to 75-86%. The present invention solves the technical problem that atmospheric-pressure or low-pressure waste hydrogen from MOCVD processes cannot be returned to the MOCVD processes for use after being recycled, and fills the gap in green and circular economy development of the LED industry.

Abstract: The present invention discloses methods for extracting and recycling ammonia in MOCVD processes by FTrPSA. Through pretreatment, medium-shallow temperature PSA concentration, condensation and freezing, liquid ammonia vaporization, PSA ammonia extraction, and ammonia gas purification procedures, ammonia-containing exhaust gases from MOCVD processes are purified to meet the electronic-level ammonia gas standard required by the MOCVD processes, so as to implement recycling and reuse of the exhaust gases, where the ammonia gas yield is greater than or equal to 70-85%. The present invention solves the technical problem that atmospheric-pressure or low-pressure ammonia-containing exhaust gases in MOCVD processes cannot be returned to the MOCVD processes for use after being recycled, and fills the gap in green and circular economy development of the LED industry.

Abstract: The present invention discloses methods for extracting and recycling hydrogen in an MOCVD process by FTrPSA. Through pretreatment, fine deamination, PSA hydrogen extraction, deep dehydration and hydrogen purification procedures, ammonia-containing waste hydrogen from an MOCVD process is purified to meet the electronic-level hydrogen (the purity is greater than or equal to 99.99999% v/v) standard required by the MOCVD process, to implement resource reuse of exhaust gases, where the hydrogen yield is greater than or equal to 75-86%. The present invention solves the technical problem that atmospheric-pressure or low-pressure waste hydrogen from MOCVD processes cannot be returned to the MOCVD processes for use after being recycled, and fills the gap in green and circular economy development of the LED industry.

Abstract: A method for producing synthesis natural gas using a straw gas, includes the steps of: pressurizing and heating a conventional straw gas, conveying the straw gas to a converter containing carbon monoxide and hydrogen to react therewith in the presence of nickel-based catalyst, so as to result in conversion gas mixture with main components of methane, carbon dioxide, water and impurity; and cooling, gas-liquid separating and purifying to obtain a synthesis natural gas with methane content of over 90%. The synthesis natural gas obtained according to the method of present invention has high energy utilization efficiency, and can not only be used for civilian by a conventional natural gas infrastructure, but also serve as an energy supply for a combustion engine or a small gas turbine.

Abstract: A method for producing synthesis natural gas using a straw gas, includes the steps of: pressurizing and heating a conventional straw gas, conveying the straw gas to a converter containing carbon monoxide and hydrogen to react therewith in the presence of nickel-based catalyst, so as to result in conversion gas mixture with main components of methane, carbon dioxide, water and impurity; and cooling, gas-liquid separating and purifying to obtain a synthesis natural gas with methane content of over 90%. The synthesis natural gas obtained according to the method of present invention has high energy utilization efficiency, and can not only be used for civilian by a conventional natural gas infrastructure, but also serve as an energy supply for a combustion engine or a small gas turbine.

Abstract: The present invention relates to a method of anhydrous ethanol production using circulation by multiple towers' alternation, the procedure includes the steps of heating, adsorption, internal circulation, vacuum suction, washing and resolving etc. The method can prolong the life of adsorbent, reduce the heat exchanger's surface, cooling water, the equipment investment and energy consumption, provide high ethanol recovery rate and high dehydration, and protect environment.

Abstract: The present invention relates to a method of anhydrous ethanol production using circulation by multiple towers' alternation, the procedure includes the steps of heating, adsorption, internal circulation, vacuum suction, washing and resolving etc. The method can prolong the life of adsorbent, reduce the heat exchanger's surface, cooling water, the equipment investment and energy consumption, provide high ethanol recovery rate and high dehydration, and protect environment.