ZnZr/HZSM-5复合催化剂上CO_(2)加氢制备C_(5+)异构烷烃  

CO_(2)hydrogenation to C5+isoalkanes on ZnZr/HZSM-5 composite catalyst

作　　者：马晓玲 王晓星[1] 宋法恩[1] 马梓轩 谭猗生[1] MA Xiao-ling;WANG Xiao-xing;SONG Fa-en;MA Zi-xuan;TAN Yi-sheng(State Key Laboratory of Coal Conversion,Institute of Coal Chemistry,Chinese Academy of Sciences,Taiyuan 030001,China;University of Chinese Academy of Sciences,Beijing 100049,China)

机构地区：[1]中国科学院山西煤炭化学研究所煤转化国家重点实验室,山西太原030001 [2]中国科学院大学,北京100049

出　　处：《燃料化学学报（中英文）》2023年第6期757-767,共11页Journal of Fuel Chemistry and Technology

基　　金：国家自然科学基金(22172182);山西省应用基础研究项目(202103021224441)资助。

摘　　要：本研究将锌锆氧化物(ZnZr)与HZSM-5分子筛有效耦合制得系列ZnZr/HZSM-5复合催化剂,考察了HZSM-5硅铝比及Zn/Zr比对复合催化剂上CO_(2)加氢制备C5+异构烷烃性能的影响。结果表明,SiO_(2)/Al_(2)O_(3)=130,Zn/Zr=1∶5制得的ZnZr-4/HZSM-5复合催化剂表现出最优的CO_(2)加氢制C_(5+)异构烷烃性能,CO_(2)转化率为17%,CO选择性抑制到25%,C_(5+)烃及C_(5+)烃中异构烷烃选择性分别达60%及89%。该复合催化剂稳定性良好,连续运转120 h未出现失活现象。ZnZr氧化物与HZSM-5分子筛的良好匹配对CO_(2)加氢高选择性合成C5+异构烷烃至关重要。Zinc-zirconium oxide(ZnZr)was effectively coupled with HZSM-5 zeolite in this report.The effects of SiO_(2)/Al2O3 ratio of HZSM-5 zeolite and Zn/Zr ratio on the performance of CO_(2)hydrogenation toC_(5+)isoalkanes over the composite catalyst were investigated,respectively.The results show that ZnZr-4/HZSM-5 prepared by SiO_(2)/Al2O3=130 and Zn/Zr=1∶5 manifests the optimal performance of CO_(2)hydrogenation toC_(5+)isoalkanes,with CO_(2)conversion of 17%and CO selectivity of 25%,as well as the selectivity ofC_(5+)hydrocarbons and isoalkanes in C5+hydrocarbons up to 60%and 89%.Moreover,ZnZr/HZSM-5 composite catalyst shows excellent stability with time on stream for 120 h without losing activity.A suitable coupling between ZnZr and HZSM-5 zeolite is critical for highly selective synthesis ofC_(5+)isoalkanes by CO_(2)hydrogenation.

关 键 词：CO_(2)加氢 C_(5+)异构烷烃 ZnZr氧化物 HZSM-5分子筛 Zn/Zr比 

分 类 号：O643[理学—物理化学]