IMPROVEMENT OF SULFIDATION AND HYDRODESULFURIZATION PERFORMANCE FOR HYDROTREATING CATALYSTS WITH CARBON ADDITION
IntroductionHydrotreating catalysts of high performance are essential to meet of the increasingly stringent legislations for low sulfur transport fuels. Molybdenum sulfides supported on alumina and promoted by Co or Ni are widely used as the hydrotreating catalysts; under hydrotreating conditions, the stabilized active phase may be carbonized 1. However, the role of carbon in the catalyst performance is still in controversy in the literature. Hallie 2 found that the catalyst activity in hydrodesulfurization (HDS) of a vacuum gas oil can be enhanced by using dimethydisulfide (DMDS) instead of H2/H2S as sulfiding agent. Chianelli et al. 1 ascribed this enhancement to the formation of carbide-like species on the surface of the active phase. However, Texier et al. 3 suggested that organosulfides diluted the exothermicity of the oxide-sulfide transformation. Glasson et al. 4 proposed a geometrical effect, I.e. Carbon deposit isolates sulfide particles from each other, which is beneficial to maintain a high dispersion of active phase.
Hui Ge Feixue Liang Xuekuan Li Zhangfeng Qin Jianguo Wang
State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, T State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, T
国际会议
The 7th China-Korea Workshop on Clean Energy Technology(第七届中韩清洁能源技术研讨会)
太原
英文
211-212
2008-06-25（万方平台首次上网日期，不代表论文的发表时间）