Zhang Xiaotong, Yan Ying
School of Chemistry and Chemical Engineering, Guangdong Provincial Key Lab of Green Chemical Product Technology, South China University of Technology, Guangzhou 510640, People's Republic of China.
R Soc Open Sci. 2018 Aug 29;5(8):180587. doi: 10.1098/rsos.180587. eCollection 2018 Aug.
Catalytic combustion of isopropanol in the structured fixed-bed reactor was investigated over Co-ZSM-5 zeolite membrane catalysts. Firstly, ZSM-5 zeolite membrane catalysts with different Si/Al ratios were coated onto the surface of stainless steel fibres via secondary growth method and wet lay-up paper-making method. Then, cobalt oxides were loaded onto the zeolite membranes by impregnation method. The performance of catalytic combustion of isopropanol was conducted over the prepared zeolite membrane catalysts, and the experimental results showed that the catalyst with infinite Si/Al ratio has the highest catalytic activity for the combustion with the lowest of isopropanol (285°C). Finally, the effects of bed structure, feed concentration, gas hourly space velocity and reaction temperature on the catalytic performance were investigated to analyse the kinetics of isopropanol over the catalyst with infinite Si/Al ratio in the structured fixed-bed reactor. The results showed that the longer residence time could cause higher reaction contact efficiency of isopropanol combustion. of isopropanol can be dramatically decreased by 105°C in the fixed-bed reactor packed with Co-ZSM-5 zeolite membrane catalysts, compared to the fixed-bed reactor packed with granular catalyst.
在Co-ZSM-5沸石膜催化剂上研究了异丙醇在结构化固定床反应器中的催化燃烧。首先，通过二次生长法和湿法造纸法将不同硅铝比的ZSM-5沸石膜催化剂涂覆在不锈钢纤维表面。然后，采用浸渍法将钴氧化物负载到沸石膜上。在制备的沸石膜催化剂上进行了异丙醇催化燃烧性能测试，实验结果表明，硅铝比为无穷大的催化剂对燃烧具有最高的催化活性，异丙醇的最低燃烧温度为285℃。最后，研究了床层结构、进料浓度、气体时空速和反应温度对催化性能的影响，以分析结构化固定床反应器中硅铝比为无穷大的催化剂上异丙醇的反应动力学。结果表明，较长的停留时间可导致异丙醇燃烧的反应接触效率更高。与填充颗粒催化剂的固定床反应器相比，在填充Co-ZSM-5沸石膜催化剂的固定床反应器中，异丙醇的燃烧温度可显著降低105℃。
