文献类型：期刊文献

英文题名：High CO Methanation Performance of Two-Dimensional Ni/MgAl Layered Double Oxide with Enhanced Oxygen Vacancies via Flash Nanoprecipitation

作者：Zhang, Mengjuan[1];Yu, Feng[1];Li, Jiangbing[1];Chen, Kai[1,3];Yao, Yongbin[1];Li, Panpan[1];Zhu, Mingyuan[1];Shi, Yulin[1];Wang, Qiang[1,2];Guo, Xuhong[1,3]

机构：[1]Shihezi Univ, Sch Chem & Chem Engn, Key Lab Green Proc Chem Engn Xinjiang Bingtuan, Shihezi 832003, Peoples R China;[2]Beijing Forestry Univ, Coll Environm Sci & Engn, Environm Funct Nanomat EFN Lab, Beijing 100083, Peoples R China;[3]East China Univ Sci & Technol, State Key Lab Chem Engn, Shanghai 200237, Peoples R China

年份：2018

卷号：8

期号：9

外文期刊名：CATALYSTS

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000448331700023)】；

基金：This work was financially supported by National Natural Science Foundation of China (U1203293), and Program for Changjiang Scholars and Innovative Research Team in University (No. IRT_15R46), and the Program of Science and Technology Innovation Team in Bingtuan (No. 2015BD003).

语种：英文

外文关键词：CO methanation; oxygen vacancy; layered double oxide; synthesis gas; synthetic natural gas; flash nanoprecipitation

摘要：As a methanation tool, two-dimensional (2D) carrier-loaded Ni has attracted the attention of many researchers. We successfully prepared 2D MgAl layered double oxides (LDO) carriers via flash nanoprecipitation (FNP). Compared to the LDO samples prepared by conventional co-precipitation (CP), the 2D MgAl-LDO (FNP) has more oxygen vacancies and more exposed active sites. The Ni/MgAl-LDO (FNP) catalyst demonstrates a CO conversion of 97%, a CH4 selectivity of 79.8%, a turnover frequency of 0.141 s(-1), and a CH4 yield of 77.4% at 350 degrees C. The weight hourly space velocity was 20,000 mL.g(-1).h(-1) with a synthesis gas flow rate of 65 mL.min(-1), and a pressure of 1 atm. A control experiment used the CP method to prepare Ni/MgAl-LDO. This material exhibits a CO conversion of 81.1%, a CH4 selectively of 75.1%, a TOF of 0.118 s(-1), and a CH4 yield of 61% at 450 degrees C. We think that this FNP method can be used for the preparation of more 2D LDO catalysts.