摘要
在温度为390-440℃的条件下，对催化油浆在不同反应时间的减粘裂化进行了研究，探讨了裂化反应产物（裂化气体、不同馏程的馏分）和缩合反应产物（正庚烷不溶物）与反应时间、反应温度的关系，研究了催化油浆的减粘裂化反应动力学，建立了裂化反应、缩合反应的动力学数学模型，同时初步研究了减压蒸馏残留物对道路沥青性质的影响，并对掺兑不同比例蒸馏残油的渣油沥青性能进行了研究．实验结果表明：随着反应程度的增加，裂化转化率和缩合转化率都提高，并且催化油浆减粘裂化产物的粘度随裂化转化率的上升呈先减小后增大的趋势；裂化反应的反应级数为2．5，裂化反应活化能为161．42kJ／mol；缩合反应的反应级数为1．7，缩合反应的活化能为264．73kJ／mol；在渣油中掺兑一定比例的油浆减粘蒸馏残油，可提高渣油的软化点，降低针入度，并对作为道路沥青重要性能指标的低温延度有明显的改善作用．
The visbreaking of catalytic cracking oil slurry under the temperature from 390 ℃ to 440 ℃ and various reaction times were investigated. The relationships between the yields of cracking reaction products （gases,distillates）, condensation reaction products （heptane insolubles） and temperature, reaction time were discussed. The kinetics of thermal cracking reaction and condensation reaction of catalytic cracking oil slurry was also discussed, and the kinetic models of cracking and condensation reaction were established. Simultaneously the influence for reduced pressure distillation residuum mixed with the asphaltic according to the different proportion exchanges residue oil were studied. The results showed that the conversions of visbreaking and condensation reaction would increase with the increase of the reaction extend, and the viscosity of visbreaking product of catalytic cracking oil slurry showed a minimum value point. The reaction orders and activation energies of cracking reaction and condensation reaction were 2.5 and 161.42 kJ/mol, 1. 7 and 264. 73 kJ/mol, respectively. The preliminary study indicated that mixes in the residual oil exchanged the certain proportion distillation residuum, the softening point of residual oil enhanced, the penetration reduced, and as the path asphalt important performance index, low temperrature ductility has the distinct improvement.
出处
《武汉工程大学学报》
CAS
2007年第2期16-19,22,共5页
Journal of Wuhan Institute of Technology
关键词
催化裂化
油浆
减粘
catalytic cracking
oil slurry
visbreaking
