重油接触裂解制乙烯集总反应动力学模型研究

Study on Lumped Kinetic Reaction Network of Heavy Oil Contact Cracking Process

从重油接触裂解 (HCC)工艺特点出发 ,在分析HCC工艺原料油结构族组成、考察不同原料油HCC反应行为的基础上 ,利用集总的方法 ,建立了HCC工艺 1 6集总反应动力学网络 (物理模型 ) ,并推导建立了数学模型。该模型体现了反应温度、反应压力、剂油比、水油比及催化剂活性等因素的影响 ,能够比较准确地描述HCC工艺的反应行为。采用分层测定和多参数估算方法 ,求取了反应网络中 70个反应速率常数和相应的活化能 ,并对该模型进行了实验验证。结果表明 ,模型计算值与实测值吻合良好 ,各产品产率计算值与实测值的绝对偏差一般在 0 5%左右 。

Based on characteristics of heavy oil contact cracking(HCC) process, analytical compositions of structural groups,as well as cracking performance of different feedstocks,a sixteen lumped kinetic reaction network and its corr e spondent mathematical model were established for HCC process.Taking into accou n t influences of reaction temperature,pressure,catalyst to oil ratio,water to oil ratio and activity of catalyst,the model could describe reaction performan c e of HCC process rather accurately.Seventy reaction velocity constants and cor r espondent apparent activation energy data in HCC model were determined by layer -divided measurement and multi-parameter estimation method,namely HCCLK,for sim ulating and predicting HCC process developed according to the determined reactio n parameters.The product yields were calculated and compared with exprimental y ields.Comparison showed product yields calculated by HCCLK were very close to experimental yields.Absolute differences were generally about 0 5%.The HCCL K software has a good calculation precision and prediction ability.