二氧化碳催化加氢合成燃料的微通道反应器

Microchannel Reactor for Hydrocarbon Fuel Synthesis from CO_(2) Catalytic Hydrogenation

[目的]CO_(2)催化加氢合成燃料是一种经济可行、可大规模实施的CO_(2)利用技术,能够解决环境和资源短缺的问题,近年来获得了国内外广泛的关注。文章旨在研究开发1种CO_(2)催化加氢合成碳氢燃料的微通道反应器。[方法]通过采用热力学计算-催化剂制备-反应器设计-结构优化-性能测试的设计思路进行分析。[结果]热力学理论分析表明:CO_(2)催化加氢可以形成碳氢燃料;开发了6种铁基催化剂,从而提高碳氢燃料合成的反应速率;基于流体数值模拟,设计并优化了微通道反应器的结构,该反应器具有结构简单紧凑、传热传质能力强等优点。实验结果表明:Zn-Fe催化剂表现出最好的CO_(2)催化加氢合成低碳烯烃性能,CO_(2)转化率和低碳烯烃选择性分别为32%和44%。[结论]设计的微通道反应器具备CO_(2)资源化利用合成碳氢燃料的功能,对我国应对气候变化、双碳目标实现以及碳氢燃料产业发展具有重要的意义。

[Introduction]CO_(2) catalytic hydrogenation for fuel synthesis is an economically feasible and large-scale implementable technology for CO_(2) utilization,which can solve the problems of environment and resource shortage,and has gained wide attention in recent years.In this work,a microchannel reactor for CO_(2) catalytic hydrogenation to synthesize hydrocarbon fuels is developed.[Method]Based on the design concept of thermodynamic calculation,catalyst preparation,reactor design,structure optimization and performance testing,an anlysis was carried out.[Result]The thermodynamic analysis shows that hydrocarbon fuels can be produced from CO_(2) catalytic hydrogenation.Six iron-based catalysts are developed to improve the reaction rate of hydrocarbon fuel synthesis.Based on the computational fluid dynamics(CFD)simulation,the structure of the microchannel reactor is designed and optimized.The microchannel reactor has the advantages of simple-compact structure and strong heat-mass transfer capability.The experimental results show that the Zn-Fe catalyst exhibits the best performance of CO_(2) catalytic hydrogenation for the synthesis of low-carbon olefins.CO_(2) conversion and low-carbon olefins selectivity are 32%and 44%respectively.[Conclusion]The microchannel reactor designed in this change,the realization of the dual-carbon target and the development of hydrocarbon fuel industry.