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用程序升温脱附技术对比研究了加和未加稀土的Ni/α-Al_2O_3.催化剂对水蒸汽的吸附特性。结果表明.单浸稀土和加有稀土的镍催化剂对水蒸汽的吸附有3个显著不同的吸附位,吸附能力主要是稀土的贡献。由于镍晶粒对稀土氧化物有复盖作用,故镍的存在削弱了对水蒸汽的吸附能力。催化剂浸渍方式不同,其镍晶粒对催化剂水蒸汽吸附能力的削弱程度也不同。添加稀土的镍催化剂不仅抗炭性能好,而且耐硫能力增强。
The temperature-programmed desorption technique was used to study the adsorption of water vapor on Ni / α-Al_2O_3 catalysts with and without addition of rare earth. The results show that there are three different adsorption sites for the adsorption of water vapor on single-rare earth and rare earth-added nickel catalysts, and the adsorption capacity is mainly the contribution of rare earth. The presence of nickel weakens the ability to adsorb water vapor because nickel grains have an effect on the rare earth oxides. The impregnation method of catalyst is different, and its nickel crystal grain has a different degree of weakening on the ability of catalyst to adsorb water vapor. Addition of rare earth nickel catalyst not only anti-carbon performance, but also enhance the ability of sulfur.