Oxide passivated Ni-supported Ru nanoparticles in silica: A new catalyst for low-temperature carbon dioxide methanation

被引：52

作者：

Polanski, Jaroslaw ^{[1
]}

Siudyga, Tomasz ^{[2
]}

Bartczak, Piotr ^{[1
,5
]}

Kapkowski, Maciej ^{[1
]}

Ambrozkiewicz, Weronika ^{[1
]}

Nobis, Agata ^{[1
]}

Sitko, Rafal ^{[1
]}

Klimontko, Joanna ^{[3
]}

Szade, Jacek ^{[3
]}

Lelatko, Jozef ^{[4
]}

机构：

[1] Univ Silesia, Inst Chem, Szkolna 9, PL-40006 Katowice, Poland

[2] Silesian Tech Univ, Dept Chem, PL-44100 Gliwice, Poland

[3] Univ Silesia, Silesian Ctr Educ & Interdisciplinary Res, A Chelkowski Inst Phys, PL-41500 Chorzow, Poland

[4] Univ Silesia, Inst Mat Sci, 75 Pulku Piechoty 1A, PL-41500 Chorzow, Poland

[5] NANO CHEM TECH, Rewolucjonistow 12-22, PL-42500 Bedzin, Poland

来源：

APPLIED CATALYSIS B-ENVIRONMENTAL | 2017年 / 206卷

关键词：

Methanation; Carbon-dioxide conversion; Nanocatalysis; Nano-Ru/Ni catalyst; Nano-Re/Ni catalyst; CO2; METHANATION; NICKEL-CATALYST; HYDROGENATION; SURFACE; MECHANISM; KINETICS; STABILITY; RHENIUM; COPPER;

D O I：

10.1016/j.apcatb.2017.01.017

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：

We tested the catalytic performance of Ni-supported Ru nanoparticles in silica for the first time. The Method for supporting Ru nanoparticles on Ni included the formation of nano-Ru/nano-SiO2, from which silica was digested in the presence of Ni. This provided a nano-Ru/Ni catalyst with an oxide passivation layer on the surface in which unalloyed metallic Ru and Ni were detected. This system, which was tested as a potential methanation catalyst, appears to be highly productive and efficient at low temperature, e.g. ca. 100% conversion can be achieved at ca. 200 degrees C at a high TOF value of 940 h(-1). The longer reaction duration deactivated the catalyst by carbon deposition; however, it did not destroy the catalyst, which could be fully reactivated by hydrogen treatment. In turn, the highest methane productivity (among nano-Re, Rh, Ir or Pd/Ni) given by TOF value of ca. 13855 h(-1) at higher temperature (460 degrees C) was observed for the nano-Re/Ni catalyst. (C) 2017 Elsevier B.V. All rights reserved.

引用

页码：16 / 23

页数：8

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