摘要
针对合成气直接转化制汽油馏分反应,合成了Zn-ZrO_2金属氧化物与沸石分子筛复合的双功能催化剂,结果显示Zn-ZrO_2/H-ZSM-5具有较高的CO转化率和汽油馏分选择性。考察了反应温度和接触时间对Zn-ZrO_2和Zn-ZrO_2/H-ZSM-5双功能催化剂的影响,证实了合成气经甲醇/二甲醚中间体制汽油馏分的反应路径。研究了Zn/Zr摩尔比、H-ZSM-5分子筛的Si/Al比对催化性能的影响,结果表明Zn/Zr摩尔比为1∶32、Si/Al为200时可获得了较好的转化率(52%)和汽油馏分选择性(62%),且催化剂经100h测试稳定性良好。
Hybrid catalysts combined Zn-ZrO2oxide with different zeolites were synthesized and used for the direct conversion of syngas.It was found that the Zn-ZrO2/H-ZSM-5catalyst exhibited higher CO conversion as well as gasoline fuel selectivity than other catalysts.The effects of reaction temperature and contact time on catalytic performances over Zn-ZrO2oxide and Zn-ZrO2/H-ZSM-5were further investigated,and the results suggested that methanol and dimethyl ether intermediates were firstly formed over Zn-ZrO2and then further transformed into gasoline fuel over H-ZSM-5zeolite.The Zn/Zr molar ratio and Si/Al molar ratio of H-ZSM-5over Zn-ZrO2/H-ZSM-5bifunctional catalyst were also studied.The results showed that the Zn/Zr molar ratio at1∶32and the Si/Al ratio of H-ZSM-5at 200over Zn-ZrO2/H-ZSM-5were beneficial to the conversion of syngas and the formation of gasoline fuel.Moreover,the catalyst was stable,there was no significant deactivation in 100h.
作者
何顺
沈政
常浩浩
刘志铭
康金灿
张庆红
王野
HE Shun;SHEN Zheng;CHANG Haohao;LIU Zhiming;KANG Jincan;ZHANG Qinghong;WANG Ye(College of Chemistry and Chemical Engineering,National Engineering Laboratory for Green Chemical Productions of Alcohols,Ethers and Esters,Xiamen University,Xiamen 361005,Fujian,China)
出处
《陕西师范大学学报（自然科学版）》
CAS
CSCD
北大核心
2019年第1期29-37,共9页
Journal of Shaanxi Normal University：Natural Science Edition
基金
国家自然科学基金(21872112)
中央高校基本科研业务费专项资金(20720170025)
