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首页> 外文期刊>Energy Science and Technology >Properties Analysis of Spent Commercial Residue Hydrotreating Catalyst: Surface Property Changes of Spent Catalysts in Commercial Residue Hydrotreating Unit
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Properties Analysis of Spent Commercial Residue Hydrotreating Catalyst: Surface Property Changes of Spent Catalysts in Commercial Residue Hydrotreating Unit

机译：商业废加氢废催化剂的性能分析：商业废加氢处理单元中废催化剂的表面性能变化

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摘要

In this study, the changes of the surface properties of 14 spent catalysts, which were sampled from a commercial residue hydrotreating unit at the end of an operation cycle, were analyzed and compared with the corresponding fresh catalysts. It was found that the changes in the surface properties do not have change laws along the bed height. Furthermore, the pore size, pore volume and surface area of most of the catalysts decreased after reaction and the number of micropores of the spent catalysts increased, due to the fact that the coke and metals deposited in the catalyst to alter the pore distribution. But some catalysts with high coke content, the pore size and pore volume decreased with the increase of surface area, which was a result of the forming of massive micro/mesopores (the pore size is mainly ranged from 3 to 10 nm), when partial soft coke desorbed under the action of the deposited active metals and micro/mesopores were formed in macropores or large mesopores. The surface properties of the spent catalysts were not only related to the deposition amounts, but also to the deposition configurations of the coke and metals on the catalysts.
机译：在这项研究中，分析了14种废催化剂的表面性质的变化，这些废催化剂是在操作周期结束时从商业残余物加氢处理装置中取样的，并与相应的新鲜催化剂进行了比较。发现表面特性的变化沿床高度没有变化规律。此外，由于焦炭和沉积在催化剂中的金属改变了孔的分布，大多数催化剂在反应后的孔径，孔体积和表面积减小，而用过的催化剂的微孔数量增加。但是，一些焦炭含量较高的催化剂，其孔径和孔体积随表面积的增加而减小，这是由于形成大量的微孔/中孔（孔径主要在3至10 nm范围内）所致。在沉积的活性金属的作用下解吸的软焦炭，在大孔或大中孔中形成了微/中孔。废催化剂的表面性质不仅与沉积量有关，而且与焦炭和金属在催化剂上的沉积构型有关。

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