Co-production of hydrogen and carbon nanotubes on nickel foam via methane catalytic decomposition

被引:39
作者
Ping, Dan [1 ]
Wang, Chaoxian [1 ]
Dong, Xinfa [1 ]
Dong, Yingchao [2 ,3 ]
机构
[1] S China Univ Technol, Sch Chem & Chem Engn, Guangzhou 510640, Guangdong, Peoples R China
[2] Chinese Acad Sci, Inst Urban Environm, CAS Key Lab Urban Pollutant Convers, Beijing 100864, Peoples R China
[3] Chinese Acad Sci, Ningbo Urban Environm Observat & Res Stn NUEORS, Beijing 100864, Peoples R China
基金
中国国家自然科学基金;
关键词
Nickel foam; Carbon nanotubes; NiO-Al2O3; transition-layer; Methane catalytic decomposition; CHEMICAL-VAPOR-DEPOSITION; NI FOAM; WIRE-MESH; CO; TEMPERATURE; PERFORMANCE; NANOFIBERS; SUBSTRATE; OXIDATION; GROWTH;
D O I
10.1016/j.apsusc.2016.02.074
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
The co-production of COx-free hydrogen and carbon nanotubes (CNTs) was achieved on 3-dimensional (3D) macroporous nickel foam (NF) via methane catalytic decomposition (MCD) over nano-Ni catalysts using chemical vapor deposition (CVD) technique. By a simple coating of a NiO-Al2O3 binary mixture sol followed by a drying-calcination-reduction treatment, NF supported composite catalysts (denoted as NiyAlOx/NF) with Al2O3 transition-layer incorporated with well-dispersed nano-Ni catalysts were successfully prepared. The effects of Ni loading, calcination temperature and reaction temperature on the performance for simultaneous production of COx-free hydrogen and CNTs were investigated in detail. Catalysts before and after MCD were characterized by XRD, TPR, SEM, TEM, TG and Raman spectroscopy technology. Results show that increasing Ni loading, lowering calcination temperature and optimizing MCD reaction temperature resulted in high production efficiency of COx-free H-2 and carbon, but broader diameter distribution of CNTs. Through detailed parameter optimization, the catalyst with a Ni/Al molar ratio of 0.1, calcination temperature of 550 degrees C and MCD temperature of 650 degrees C was favorable to simultaneously produce COx-free hydrogen with a growth rate as high as 10.3% and CNTs with uniform size on NF. (C) 2016 Elsevier B.V. All rights reserved.
引用
收藏
页码:299 / 307
页数:9
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