Ni-phyllosilicate structure derived Ni-SiO2-MgO catalysts for bi-reforming applications: acidity, basicity and thermal stability

被引：114
作者：
Ashok, J. [1 ]
Bian, Z. [1 ]
Wang, Z. [1 ]
Kawi, S. [1 ]
机构：
[1] Natl Univ Singapore, Dept Chem & Biomol Engn, Singapore 119260, Singapore
来源：
CATALYSIS SCIENCE & TECHNOLOGY | 2018年 / 8卷 / 06期
基金：
新加坡国家研究基金会;
关键词：
TAR MODEL-COMPOUND; CARBON-DIOXIDE; PEROVSKITE CATALYST; METGAS CO-2H(2); CR CATALYSTS; METHANE; STEAM; BIOGAS; SYNGAS; GAS;
D O I：
10.1039/c7cy02475d
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
In this work, Ni-SiO2-MgO materials synthesized via Ni-phyllosilicate (PS) intermediates were explored for bi-reforming of methane (BRM) reaction. The influence of steam and reaction temperature was also investigated for the BRM reaction. Overall, the 15 wt% Ni-30 wt% SiO2-55 wt% MgO (Ni-SiO2-MgO[55]) catalyst maintained exceptional catalytic performance (CH4 and CO2 conversions were 80% and 60%, respectively) at 750 degrees C for 140 h with negligible carbon deposition and also showed a stable H-2/CO of 2.0. The best catalytic performance of the Ni-SiO2-MgO[55] catalyst is attributed to its enhanced basicity strength, reasonable moderate acidity strength and structural stability during high temperature reforming reaction. The formation and presence of Ni-Mg-containing phyllosilicates in fresh and reduced catalysts respectively was confirmed by TEM images and XRD analysis. The T-max of around 750 degrees C in TPR profiles of Ni/SiO2-MgO catalysts further confirms the strength of interactions between Ni and SiO2-MgO support species.
引用
收藏
页码：1730 / 1742
页数：13
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