Highly selective synthesis of LPG from CO2 hydrogenation over In2O3/SSZ-13 binfunctional catalyst

被引：0

作者：

Lu S.-Y. ^{[1
,2
]}

Yang H.-Y. ^{[1
]}

Yang C.-G. ^{[1
]}

Gao P. ^{[1
,2
]}

Sun Y.-H. ^{[1
,3
,4
]}

机构：

[1] CAS Key Laboratory of Low-Carbon Conversion Science and Engineering, Shanghai Advanced Research Institute, Chinese Academy of Science, Shanghai

[2] University of the Chinese Academy of Sciences, Beijing

[3] School of Physical Science and Technology, Shanghai Tech University, Shanghai

[4] Shanghai Institute of Clean Technology, Shanghai

来源：

Ranliao Huaxue Xuebao/Journal of Fuel Chemistry and Technology | 2021年 / 49卷 / 08期

基金：

中国国家自然科学基金;

关键词：

CO[!sub]2[!/sub] hydrogenation; In[!sub]2[!/sub]O[!sub]3[!/sub]/SSZ-13 composite catalyst; LPG synthesis; Reaction condition; Size effect;

D O I：

10.1016/S1872-5813(21)60057-9

中图分类号：

学科分类号：

摘要：

Highly selective synthesis of liquefied petroleum gas (LPG, C03 and C04) from CO2 hydrogenation have realized over the In2O3/SSZ-13 bifunctional catalyst. The physicochemical properties of the bifunctional catalyst were characterized by X-ray diffraction spectroscopy (XRD), N2 physical adsorption, scanning electron microscopy (SEM), transmission electron microscopy (TEM) and NH3 temperature-programmed desorption (NH3-TPD). The particle size effect of In2O3 and reaction conditions were investigated for CO2 hydrogenation to LPG over the In2O3/SSZ-13 bifunctional catalyst. Results indicate that CO2 conversion and CO selectivity are related to the particle size of In2O3, and fresh 5 nm In2O3 shows the highest CO2 conversion (11.7%) and the highest CO selectivity (61.0%), since it is more prone to reverse water gas reaction (RWGS). However, the hydrocarbon distribution does not exhibit a dependence of In2O3 size changes, and the selectivity of LPG maintains at 90% and the selectivity of propane reaches up to 76.8% due to the 8-MR micropores and strong acid sites of SSZ-13 zeolite. Additionally, the yield of LPG shows a volcano type with increasing reaction temperature, and the optimal reaction temperature is 370 ℃. Low space velocity is more favorable to the CO2 conversion, and LPG selectivity in hydrocarbon products still maintains about 90%. High reaction pressure is beneficial to improving the yield of LPG via promoting the secondary hydrogenation reaction over the SSZ-13 zeolite and inhibiting CO formation. Furthermore, no obvious deactivation is observed after a time on stream (TOS) of 100 h over the In2O3/SSZ-13 bifunctional catalyst at 350 ℃, 3 MPa and 9000 mL/(gcat·h). The research provides a new strategy for highly selective synthesis of LPG from CO2 hydrogenation. © 2021, Science Press. All right reserved.

引用

页码：1132 / 1139

页数：7

共 30 条

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