Research Progress of Coupled Catalytic Membrane Reactors
Researcher Yang Weishen and Zhu Xuefeng of the State Key Laboratory of Catalysis Foundation of the Dalian Institute of Chemistry, Chinese Academy of Sciences led the team of inorganic membranes and catalytic materials to make progress in the preparation of ammonia raw material gas and synthetic liquid fuel feedstock gas in an oxygen-permeable membrane reactor. Published on the 14th in Germany "Applied Chemistry."
Synthetic ammonia and Fischer-Tropsch synthesis to prepare liquid fuels are two important chemical processes, and the corresponding synthesis gas preparation is critical. The existing industrial preparation of ammonia synthesis gas requires at least 6 steps, the preparation of liquid fuel synthesis gas requires at least 3 steps, the process is complex and the energy consumption is high. In addition, the ammonia synthesis gas preparation process is accompanied by a large amount of carbon dioxide emissions.
The research team proposed the concept of simultaneous preparation of ammonia synthesis gas and liquid fuel syngas in a mixed conductor permeable membrane reactor, ie, water vapour and air are introduced into the membrane i side, and natural gas (methane) is introduced into the membrane ii side. At high temperature, the oxygen generated by the oxygen and water in the air on the membrane i side reaches the membrane ii through the oxygen-permeable membrane and reacts with methane to form a liquid fuel syngas, and the ammonia gas is obtained by condensing and drying the outflow gas on the membrane i side. In theory, a factory producing 300,000 tons of ammonia and 1 million tons of methanol at the same time will require a membrane area of ​​approximately 7,500 square meters, and the reactor volume will be only 75 cubic meters, reflecting a high degree of process enhancement. In addition, its energy consumption is 63% lower than existing industrial processes; membrane reactors have no flying temperature and explosion risk; environment-friendly, no direct co2 emissions and ammonia synthesis gas cleaning, no harmful gases, such as co, h2s and so on.
Synthetic ammonia and Fischer-Tropsch synthesis to prepare liquid fuels are two important chemical processes, and the corresponding synthesis gas preparation is critical. The existing industrial preparation of ammonia synthesis gas requires at least 6 steps, the preparation of liquid fuel synthesis gas requires at least 3 steps, the process is complex and the energy consumption is high. In addition, the ammonia synthesis gas preparation process is accompanied by a large amount of carbon dioxide emissions.
The research team proposed the concept of simultaneous preparation of ammonia synthesis gas and liquid fuel syngas in a mixed conductor permeable membrane reactor, ie, water vapour and air are introduced into the membrane i side, and natural gas (methane) is introduced into the membrane ii side. At high temperature, the oxygen generated by the oxygen and water in the air on the membrane i side reaches the membrane ii through the oxygen-permeable membrane and reacts with methane to form a liquid fuel syngas, and the ammonia gas is obtained by condensing and drying the outflow gas on the membrane i side. In theory, a factory producing 300,000 tons of ammonia and 1 million tons of methanol at the same time will require a membrane area of ​​approximately 7,500 square meters, and the reactor volume will be only 75 cubic meters, reflecting a high degree of process enhancement. In addition, its energy consumption is 63% lower than existing industrial processes; membrane reactors have no flying temperature and explosion risk; environment-friendly, no direct co2 emissions and ammonia synthesis gas cleaning, no harmful gases, such as co, h2s and so on.
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| Commodity Name | Aspen chopsticks/Wooden chopsticks |
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| Individual Packing | 1. Nuked |
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