摘要
从原料油和煤的主要物化特征入手,描述了它们的热解和加氢热解化学过程,尽管差异众多,但自由基反应这点是共同的,在此基础上提出油煤共炼采用两个反应器的新的工艺流程。油、煤热解过程有大量小分子烃类产生,从过程机理出发,选择合适的煤种,采取适当的措施便可以得到一定产率的轻质燃料油。油和煤的物化结构特征有差别,它们加氢热解生成的轻质燃油的组成不同,油加氢裂化生成的轻质燃油主要是大分子侧链及部分烷烃裂解产物;而来自煤的轻质燃油主要是单环、双环、三环芳烃,链烷烃量较少。油煤加氢共炼需要妥善应对原料油中胶质、沥青质热裂解带来的影响,避免其对煤热解造成负面影响。
This paper first described known thermal decomposition and hydrocracking processes using heavy oil and coal as feedstock respectively, where the characteristic and structural difference between crude and coal were presented. Studies showed that though fundamental differences observed between heavy oil and coal based thermal decomposition processes,the principle of free radical chain reactions was shared,which was the theoretical basis of oil-coal co-processing. It was reported that aromatics up to three-ring was mostly found in the hydrocracked products from coal feed; whereas segments from long paraffinic chain or aliphatic suhstituents in polycyclic aromatic hydrocarbons were the major components of oil based hydrocracked products. It Should be noted that asphaltene and gum in heavy oil could favor the formation of coke and lower light oil yield during oil-coal co-processing,and the selection of suitable coal species was also significant. Based on the discussions,a two-stage reactors design was proposed for the co-processing process.
出处
《石油炼制与化工》
CAS
CSCD
北大核心
2011年第6期1-5,共5页
Petroleum Processing and Petrochemicals
关键词
油煤共炼
加氢裂化
热解
工艺过程
oil and coal co-processing
hydrocracking
pyrolysis
process
