摘要
在 4 0 0～ 5 0 0℃温度范围内 ,利用升降温度快、控温平稳的特制ZP -II型重油热反应评价装置 ,对管输减压渣油进行了热反应试验。利用气相色谱分析裂化气的组成 ;液相反应产物通过色谱模拟实沸点蒸馏分析 ,以30℃的馏程范围划分成窄馏分 ;利用索式抽提对残渣油的缩合产物进行分析。假定裂解和缩合反应均为一级反应且反应产物不参加二次反应 ,不考虑缩合反应的连串过程 ,假定缩合产物为甲苯不溶物。通过开发的重油热裂解产物分布模型和编制的模型软件 ,得到了管输渣油热反应模型参数 ,由相关系数R检验结果表明 ,关联出的模型常数具有较好的相关性 ;由F检验可看出 ,关联的模型常数置信度在 99%以上。偏差分析表明拟合结果与实验数据吻合较好。在转化率较低时 ,该结果可以用来预测管输渣油裂解及缩合反应行为。
The thermal conversion of the pipe vacuum residue was carried out by using special equipment which can be temperature programmed quickly and smoothly in the range of 400 ℃ to 500 ℃. The composition of cracking gas was analyzed by gas chromatography, and the reacted residue was separated into toluene soluble and insoluble by Soxhlet apparatus. The narrow cut of reactant and product was determined by chromatography distillation with the boiling point of 30 ℃ according to mass fraction. It is assumed that both cracking and condensation reactions are the first order reaction, and there is no secondary reaction produced by the products. A lumped model for product distribution in thermal conversion of heavy oil was proposed. Reaction apparent activation energy and frequency factor were calculated by special model software. The coefficient R and F test shows that the model is fit to the experimental data. Therefore, when the conversion is low, the model can be used to predict the cracking condensation reaction of the pipe vacuum inner tube of coking heater.
出处
《石油化工高等学校学报》
CAS
2004年第3期44-47,共4页
Journal of Petrochemical Universities
基金
中国石化总公司项目 (30 0 0 18)
关键词
减压渣油
热反应
动力学
Vacuum residue
Thermal conversion
Kinetics
