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本文介绍我们研制的一种具有大孔径、高强度、高水热稳定性的载体。这种载体系用浸渍—沉淀法在其表面铺上约三个分子层的稀土和土族混合氧化物进行改性。由它制成的烃类蒸汽转化催化剂,经催速老化并在中试装置转化管的不同位置投样试验表明,其强度、比表面和甲烷转化活性的衰减速率及镍晶粒的增长速率等都明显低于工业上现用的同类催化剂。
This article describes a carrier that we have developed with a large pore size, high strength, high hydrothermal stability. The carrier is modified by impregnation-precipitation method with rare earths and mixed-state oxides mixed with about three molecular layers on its surface. The hydrocarbon steam reforming catalyst made from it has been subjected to accelerated aging and sample injection tests at different positions of the pilot tube in the pilot plant. The results show that the strength, specific surface area, methane decay rate and the growth rate of nickel grains Are significantly lower than similar catalysts currently available in the industry.