Customized Ni–MgO–Al2O3 catalyst for carbon dioxide reforming of coke oven gas: Optimization of preparation method and co-precipitation pH

Ni-C/SiO2 and Ni-G/SiO2 catalysts were prepared by a complexed-impregnation method using citric acid and glycine as complexing agents, respectively. Ni/SiO2 was also prepared by the conventional incipient impregnation method. All the catalysts were comparatively tested for carbon dioxide reforming of methane (CDR) at P = 1.0 atm, T = 750 °C, CO2/CH4 = 1.0, and GHSV = 60,000 mL·g−1·h−1. The results showed that Ni-C/SiO2 and Ni-G/SiO2 exhibited better CDR performance, especially regarding stability, than Ni/SiO2. The conversions of CH4 and CO2 were kept constant above 82% and 87% after 20 h of reaction over Ni-C/SiO2 and Ni-G/SiO2 while they were decreased from 81% and 88% to 56% and 59%, respectively, over the Ni/SiO2. The characterization results of the catalysts before and after the reaction showed that the particle size and the distribution of Ni, as well as the interactions between Ni and the support were significantly influenced by the preparation method. As a result, an excellent resistance to the coking deposition and the anti-sintering of Ni was obtained over the Ni-C/SiO2 and Ni-G/SiO2, leading to a highly active and stable CDR performance.

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Investigation on the simultaneous removal of COS, CS2 and O2 from coke oven gas by hydrogenation on a Pd/Al2O3 catalyst

Catalysis Science & Technology ◽

10.1039/c9cy02579k ◽

2020 ◽

Vol 10 (9) ◽

pp. 2961-2969

Author(s):

Eva Kamp ◽

Holger Thielert ◽

Olaf von Morstein ◽

Sven Kureti ◽

Norman Schreiter ◽

...

Keyword(s):

Fixed Bed ◽

Coke Oven ◽

Fixed Bed Reactor ◽

Organosulfur Compounds ◽

Simultaneous Removal ◽

Coke Oven Gas ◽

Al2o3 Catalyst

Simultaneous hydrogenation of organosulfur compounds and O2 by Pd/Al2O3 catalyst was studied in a fixed bed reactor and by DRIFTS.

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Carbon dioxide reforming of methane over glow discharge plasma-reduced Ir/Al2O3 catalyst

Catalysis Communications ◽

10.1016/j.catcom.2007.12.024 ◽

2008 ◽

Vol 9 (7) ◽

pp. 1558-1562 ◽

Cited By ~ 51

Author(s):

Yu Zhao ◽

Yun-xiang Pan ◽

Yongbing Xie ◽

Chang-jun Liu

Keyword(s):

Carbon Dioxide ◽

Glow Discharge ◽

Discharge Plasma ◽

Glow Discharge Plasma ◽

Carbon Dioxide Reforming ◽

Al2o3 Catalyst

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Experimental Study of the Reforming of Methane with Carbon Dioxide over Coal Char

International Journal of Chemical Reactor Engineering ◽

10.2202/1542-6580.1629 ◽

2008 ◽

Vol 6 (1) ◽

Author(s):

Yanbing Li ◽

Rui Xiao ◽

Baosheng Jin ◽

Huiyan Zhang

Keyword(s):

Carbon Dioxide ◽

Flow Rate ◽

Fixed Bed ◽

Coke Oven ◽

Fixed Bed Reactor ◽

Internal Diameter ◽

Generation System ◽

Coke Oven Gas ◽

Surface Areas ◽

Conversion Of Methane

As one of the fundamental issues of the new poly-generation system on the basis of gasification gas and coke oven gas, carbon dioxide reforming of methane experiments have been performed over coal chars derived from different parent coals in a lab-scale fixed-bed reactor (internal diameter 12 mm, length 700 mm). The char derived from TongChuan coal exhibited higher activity than other samples employed under the same conditions. After the reforming reaction, the char samples were covered with different amounts of carbon deposition which resulted in the surface areas decrease. As the flow rate of feed gas increased from 200 ml/min to 600 ml/min over the Xuzhou char sample at 1050 degrees Celsius, the conversion of methane decreased from 52.7% to 17.5% and the H2 /CO dropped from 0.75 to 0.55. While maintaining the flow rate of CO2 at 20ml/min at 1050 degrees Celsius, the mole ratio of reactants CH4/CO2 was varied from 1 to 1.75 which led to the H2/CO ratio increase from 0.75 to 1.2.

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