Efficient utilization of silanol group in rice husk to promote the synthesis of Ni-phyllosilicate for CO2 methanation

被引：11

作者：

Chen, Yaqi ^{[1
]}

Li, Hai ^{[1
]}

Liu, Jia ^{[1
]}

Liu, Ning ^{[1
,2
]}

Yang, Jing ^{[1
]}

Zhang, Yang ^{[1
]}

Guo, Qingbin ^{[1
]}

Wang, Fang ^{[3
]}

Liu, Qing ^{[1
]}

机构：

[1] Shandong Univ Sci & Technol, Key Lab Low Carbon Energy & Chem Engn, Qingdao 266590, Peoples R China

[2] Shandong Ruihao Heavy Machinery Co Ltd, Tai An 271609, Peoples R China

[3] Beijing Technol & Business Univ, Key Lab Cleaner Prod & Integrated Resource Utiliza, Beijing 100048, Peoples R China

来源：

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY | 2022年 / 47卷 / 49期

关键词：

Ni; SiO2; Promotion; CATALYST;

D O I：

10.1016/j.ijhydene.2022.04.249

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：

It is a challenge to prepare Ni-phyllosilicate catalysts deriving from the reaction of nickel salts and biomass-based silica with high Ni contents. In order to efficiently synthesize nickel phyllosilicate, the acid-treated rice husk without calcination (P-R) was directly used as the raw material. The as-synthesized Ni-phyllosilicate (N/P-R) exhibited high nickel content of 46.7 wt% owing to utilization of the abundant silanol group in the fresh rice husk. On the contrary, the Ni content of Ni-phyllosilicate sample (N/R-S) prepared using the calcinated rice husk-based silica was only 4.8 wt% because of the loss of silanol group during calcination process. As a result, N/P-R displayed much higher catalytic activity for CO2 methanation than N/R-S. It was found that the silanol group was in favour of forming the important intermediate Si(OH)4, and thereby facilitated the formation of nickel

引用

页码：21173 / 21181

页数：9

共 33 条

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