Effect of support materials and Ni loading on catalytic performance for carbon dioxide reforming of coke oven gas

• Published in: International journal of hydrogen energy 2019-03, Vol.44 (16), p.8233-8242
• Main Authors: Kim, Hak-Min, Kim, Beom-Jun, Jang, Won-Jun, Shim, Jae-Oh, Jeon, Kyung-Won, Na, Hyun-Suk, Lee, Yeol-Lim, Jeon, Byong-Hun, Roh, Hyun-Seog
• Format: Article
• Language: English
• Subjects: Carbon dioxide reforming of coke oven gas; Ni loading; Ni/MgO[sbnd]Al2O3 catalyst; Support materials
• ISSN: 0360-3199; 1879-3487
• DOI: 10.1016/j.ijhydene.2019.01.269

To investigate the effect of support materials on catalytic performance in carbon dioxide reforming of coke oven gas, Ni-based catalysts supported on various metal oxides with various properties are prepared and evaluated. The support material affects the important properties related to the catalytic performance such as surface area, Ni dispersion, basicity, oxygen storage capacity, and interaction between Ni and support. Among the various catalysts on different metal oxides, Ni/MgOAl2O3 catalyst exhibits the highest CH4 conversion due to its high Ni dispersion, large surface area, and strong basicity. Hence, the Ni loading in the Ni/MgOAl2O3 catalyst is optimized. Ni loading performs the important roles to determine the Ni dispersion, the amount of Ni active sites, and basicity. 15 wt% Ni/MgOAl2O3 catalyst shows the highest catalytic activity even at a high gas hourly space velocity (GHSV) of 1,500,000 h−1, owing to the large amount of Ni active sites which related to Ni loading, Ni dispersion, and reduction degree. To confirm the stability of the 15 wt% Ni/MgOAl2O3 catalyst, catalytic reaction has been carried out for 50 h and noticeable catalytic deactivation is not observed for 50 h. •Effect of support material on catalyst for CO2 reforming of COG is investigated.•Support materials affect Ni dispersion, basicity, and oxygen storage capacity.•Among the supported catalysts, Ni/MgOAl2O3 shows the highest performance.•Ni loading affects Ni dispersion, the amount of Ni active sites and basicity.•15 wt% Ni/MgOAl2O3 exhibits the highest activity and stability.