The promotional effect of K on the catalytic activity of Ni/MgAl2O4 for the combined H2O and CO2 reforming of coke oven gas for syngas production

• Published in: The Korean journal of chemical engineering Vol. 33; no. 11; pp. 3115 - 3120
• Main Authors: Lee, Jin Hyang, Koo, Kee Young, Jung, Un Ho, Park, Ji Eun, Yoon, Wang Lai
• Format: Journal Article
• Language: English
• Published: New York Springer US 01-11-2016; Springer Nature B.V; 한국화학공학회
• Subjects: Biotechnology; Carbon dioxide; Catalysis; Catalysts; Catalytic activity; Chemisorption; Chemistry; Chemistry and Materials Science; Coke oven gas; Coke ovens; Industrial Chemistry/Chemical Engineering; Materials Science; Reaction Engineering; Reforming; Synthesis gas; 화학공학; O and CO; Coke Oven Gas; Coke; Ni-K/MgAl; Reforming; Combined H; Syngas; O
• ISSN: 0256-1115; 1975-7220
• DOI: 10.1007/s11814-016-0149-8

A K-promoted 10Ni-(x)K/MgAl
2
O
4
catalyst was investigated for the combined H
2
O and CO
2
reforming (CSCR) of coke oven gas (COG) for syngas production. The 10Ni-(x)K/MgAl
2
O
4
catalyst was prepared by co-impregnation, and the K content was varied from 0 to 5 wt%. The BET, XRD, H
2
-chemisorption, H
2
-TPR, and CO
2
-TPD were performed for determining the physicochemical properties of prepared catalysts. Except under the condition of a K/Ni=0.1 (wt%/wt%), the Ni crystal size and dispersion decreased with increasing K/Ni. The coke resistance of the catalyst was investigated under conditions of CH
4
: CO
2
: H
2
: CO:N
2
=1 : 1 : 2 : 0.3 : 0.3, 800 °C, 5 atm. The coke formation on the used catalyst was examined by SEM and TG analysis. As compared to the 10Ni/MgAl
2
O
4
catalyst, the Kpromoted catalyst exhibited superior activity and coke resistance, attributed to its strong interaction with Ni and support, and the improved CO
2
adsorption characteristic. The 10Ni-1K/MgAl
2
O
4
catalyst exhibited optimum activity and coke resistance with only 1wt% of K.