PtSn/Al_2O_3负载型催化剂丙烷脱氢性能的改进

Improvement of Catalytic Performance of PtSn/AI_2O_3 Catalyst for Dehydrogenation of Propane

通过调变反应气氛、在催化剂中添加第三组份及改变催化剂制备方法来保证PtSn/Al_2O_3催化剂中锡组份在反应条件下以氧化态存在,从而通过提高锡组份载量来改善催化剂性能。结果表明,在N_2中低温反应时,锡组份载量提高至2.1w％时,PtSn/Al_2O_3催化剂才具有一定的稳定性。第三组份Mg或K的加入可以改善PtSn/Al_2O_3催化剂性能,但第三组份的加入量一定要适当加以控制。在不同制备方法制备的PtSn/Al_2O_3催化剂中,由共沉淀法制备的催化剂性能最佳。

It has been reported that the catalytic periormance of PtSn/Al_2O_3 catalysta for dehydrogenation of propane was improved by choice of preparation methods, addition of third components, and changes of reaction atmospheres.