摘要
使用模型化合物在微型反应釜中研究了载体炭黑对渣油内部氢转移反应的影响。结果表明,炭黑可以明显地促进四氢萘到蒽的氢转移反应。使用等体积浸渍法制备了Fe/炭黑、Ni/炭黑催化剂并对Fe/炭黑催化剂进行了XRD、SEM表征,结果表明,金属硫化物附着在炭黑颗粒的表面,直径为1μm左右。在高压反应釜中研究了载体炭黑和以炭黑为载体的催化剂对克拉玛依常压渣油430℃加氢反应的影响,并于传统的水溶性分散型催化剂的抑焦性能进行了对比。结果表明,Fe/炭黑、Ni/炭黑催化剂可以明显地抑制渣油加氢反应的生焦,水洗后的催化剂效果比未经水洗的催化剂抑制生焦的效果好;Ni/炭黑催化剂抑焦效果比Fe/炭黑催化剂好;Fe/炭黑催化剂比同等浓度的水溶性Fe催化剂抑焦效果好。对反应产物馏分的分析表明,Fe/炭黑催化剂可以有效地抑制渣油缩合生焦,同时在一定程度上抑制裂化反应。
The effects of the carrier carbon black on the interior hydrogen-transferring reactions of residual oil were studied in a miniature batch reactor.The results indicated that carbon black could promote the hydrogen transfer from tetralin to anthracene.Fe/carbon black and Ni/carbon black catalysts were prepared using equal volume impregnation method and characterized by X-ray diffraction and scanning electron microscope.The results showed that metal sulfides were attached on the surface of carbon black.The average diameter of metal sulfide crystals was about 1 μm.The thermal reactions of Karamay residual oil with carbon black,Fe/carbon black,or Ni/carbon black catalyst were carried out in a batch reactor in hydrogen atmosphere to investigate their effects which then were compared with those of traditional water-soluble dispersed catalysts.The reaction temperature was 430 ℃ and the catalyst content was 1%.It was found that on coke formation restricting,waterwashed catalyst was better than unwashed catalyst,Ni/carbon black was better than Fe/carbon black,and Fe/carbon black was better than water-soluble dispersed catalyst.The fraction distribution analysis of products showed that Fe/carbon black could restrict the cracking and condensation of residue.
出处
《燃料化学学报》
EI
CAS
CSCD
北大核心
2007年第5期558-562,共5页
Journal of Fuel Chemistry and Technology
关键词
催化剂载体
炭黑
渣油
生焦
catalyst support
carbon black
residue
coke
