The Promotional Effect of Initiators in Hydro-thermal Cracking of Resids
注意：本论文已在《ACS Prepr. Div. Fuel Chem., New Orleans, USA,》 44 (4), pp.801.发表
使用者请注明论文出处
Jie Chang, Li
Fan and Kaoru Fujimoto
Department of Applied Chemistry, School of Engineering, The University of
Tokyo
Introduction
With growing worldwide demand for transport fuels and other middle distillates, much attention has been paid to the upgrading of heavy oil feedstock. It was forecasted that up to early 2000, the petroleum product slate will continue to shift from fuel oil to transportation fuels, distillate and jet will be the products with the strongest growth, and the conversion will be increased worldwide to meet this trend (Sonnemans, 1995). Based on cracking mechanism, there are three main industrial processes to produce middle distillate from resid, thermal cracking, catalytic cracking and hydrocracking. Hydro-thermal cracking, the combination of thermal cracking and catalytic hydrogenating, is a novel method developed by Fujimoto laboratory to upgrade resids aiming at maximum middle distillate (Fujimoto et al., 1988; Aimoto et al., 1991; Yang et al., 1998). The following elementary steps are important during hydro-thermal cracking reactions: (1) Initiation free radical (homolytic cleavage of a hydrocarbon molecule into two free radicals). (2) Free radical dissociation (βscission). (3) Hydrogen transfer (between H2, radical and hydrocarbon). H transfer from H2 to radical may suppress the secondary cracking of hydrocarbon. It was supposed that some effective initiators could probably enhance the conversion of resids by increasing the concentration of free radicals. Much research has been carried out on catalyst development, reaction mechanism, process design and optimization in the above refinery processes in the last half century. But the issue of adding initiators in the cracking of resids was very rarely addressed. The present work showed the promotional effect of initiators in hydro-thermal cracking of resids and its model compound.
1、浏览PDF格式全文需要使用软件－－Abode Acrobat(由于软件较大并常见,我站不提供下载)
2、下载论文全文请点击(22KB)
作者点评：
从反应机理上可以将石油炼制工艺分为两大类：加氢和脱碳。加氢工艺包括加氢处理和加氢裂化等。脱碳工艺包括催化裂化、热裂化和焦化等。但其目的都是提高产品的H/C比，脱除硫、氮、氧和金属等杂原子。针对国际上对中间馏分油需求量不断增大的趋势，我们创造性的提出了以多产中间馏分油为目标的加氢热裂化新方法。
本文采用模型化合物十二烷基苯(1-phenyldodecane)和二苯基丙烷对加氢裂化、热裂化和加氢热裂化反应进行比较，采用色谱－质谱联用对反应产物进行了表征。2003.5.
本站收录的本文作者的其他论文：
1、Elemental sulfur as an effective promoter for the catalytic hydrocracking of Arabian vacuum residue
2、Kinetics of resid hydrotreating reactions
3、Hydrothermal cracking of residual oils
4、生物质废弃物制氢技术
5、Enhancement effect of free radical initiator on hydro-thermal cracking of heavy oil and model compound
更多相关论文请点击本站的<<<站内全文搜索>>>查找
|
