Packed bed microreactor for preparing ethylene by dehydration of bioethanol

Abstract

The invention discloses a packed bed microreactor for preparing ethylene by the dehydration of bioethanol, which mainly solves the technical problems of a reactor for performing the catalytic dehydration reaction of the ethanol by adopting combustion heat supply, the problems of uniform temperature distribution of a catalyst bed of the reactor in a combustion heat supply way, and the technical problem of how to rapidly and highly-efficiently fill large catalyst particles in the microreactor. In the packed bed microreactor, two microchannel plate cores and three partition plates are sequentially arranged and packaged in a diffusion welding or braze welding way to form catalytic combustion chambers and catalytic hydrogenation reaction chambers which are alternately communicated in series and parallel, and a stratified combustion process is adopted to solve the problems. The catalyst bed of the integrated microreactor has uniform temperature, and ethanol conversion rate and ethylene selectivity which are both higher than 98 percent, and can realize operations at the high space velocity of 10 to 100 h<-1>. After parallel amplification, the microreactor can be used for the large-scale industrial production of the ethylene prepared from the bioethanol.

Description

technical field [0001] The invention relates to a packed-bed microreactor for producing ethylene by catalytic dehydration of bioethanol, in particular to a microreactor integrated with the reaction process of catalytic combustion of methanol / hydrogen and catalytic dehydration of ethanol to produce ethylene. Background technique [0002] With the global energy crisis and the depletion of petroleum resources, the production of ethylene from biomass ethanol can avoid excessive dependence on petroleum resources. Moreover, the bio-ethylene process is short, the investment in equipment is small, and the purity of ethylene is high. Especially with the rapid development of biotechnology and the continuous improvement of ethanol production technology using bulk biomass as raw materials, the production cost of ethanol-based ethylene will become more reasonable. As an alternative or supplementary technology to produce ethylene from natural gas or light petroleum fractions, it will also...

AI Technical Summary

Problems solved by technology

The plate reactor adopts micron-scale characteristic scale channels, and under the condition that the catalyst wall loading technology is still immature, it cannot be filled with granular catalysts, so it is not suitable for the catalytic dehydration of bioethanol to ethylene.

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