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首页> 外文期刊>Applied Catalysis, B. Environmental: An International Journal Devoted to Catalytic Science and Its Applications >Catalytic conversion of tar from hot coke oven gas using 1-methylnaphthalene as a tar model compound
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Catalytic conversion of tar from hot coke oven gas using 1-methylnaphthalene as a tar model compound

机译：以1-甲基萘为焦油模型化合物从热焦炉煤气中催化转化焦油

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摘要

High concentration (1.3 vol.%) of 1-methylnaphthalene was selected as a tar model compound to investigate the catalytic conversion of tar from hot coke oven gas (COG) with lower steam content under atmospheric pressure over the Ni/MgO/Al2O3 catalysts. The catalysts were prepared by impregnating boehmite (AlOOH) with an aqueous solution of magnesium nitrate and nickel nitrate. The effects of Ni loading, reaction temperature, steam/carbon (S/C) molar ratio on the catalytic performance of the catalysts were discussed in detail. The catalysts exhibited excellent activity, stability and resistance to carbon deposition. Tar compounds could be completely converted into light fuel gases over 10% Ni/MgO/Al2O3 at 775 °C and S/C=0.7. The effect experiments of sulphur were performed by adding 1000 and 2500 ppm H2S in the feed. The used catalysts were characterized by XRD and TG analyses. It was first found that addition of H2S in the feed could greatly inhibit the carbon formation on the catalyst surface and lead to significant improvement in the activity and stability of the catalyst. This phenomenon has never been reported previously in the tar steam reforming.
机译：选择高浓度（1.3％（体积））的1-甲基萘作为焦油模型化合物，以研究在大气压力下，Ni / MgO / Al2O3催化剂在较低的蒸汽含量下从热焦炉煤气（COG）中催化转化焦油的方法。通过用硝酸镁和硝酸镍的水溶液浸渍勃姆石（AlOOH）来制备催化剂。详细讨论了镍负载量，反应温度，水蒸气/碳（S / C）摩尔比对催化剂催化性能的影响。催化剂表现出优异的活性，稳定性和抗碳沉积性。在775°C和S / C = 0.7的条件下，焦油化合物可以在10％Ni / MgO / Al2O3中完全转化为轻质燃料气体。通过在进料中添加1000和2500 ppm H2S进行硫的效果实验。通过XRD和TG分析来表征所使用的催化剂。首先发现在进料中添加H 2 S可以极大地抑制催化剂表面上的碳形成并导致催化剂的活性和稳定性的显着改善。以前从未在焦油蒸汽重整中报道过这种现象。

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