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In fixed-bed bench scale unit, hydrocracking of hydrotreated coal-derived distillate with 3825 catalyst(Ni-Mo/SiO_2-Al_2O_3) was performed to produce gasoline and BTX reforming stocks. Effect of reaction temperature (350℃-390℃ on hydrocracking conversion, hydrogen consumption, product distribution and properties were examined under conditions of pressure 14.7 MPa, LHSV 1.5 h~(-1) and H_2/oil 1600 vol/vol. Experimental results showed that 385℃ was the suitable temperature for production of gasoline. At this temperature,... In fixed-bed bench scale unit, hydrocracking of hydrotreated coal-derived distillate with 3825 catalyst(Ni-Mo/SiO_2-Al_2O_3) was performed to produce gasoline and BTX reforming stocks. Effect of reaction temperature (350℃-390℃ on hydrocracking conversion, hydrogen consumption, product distribution and properties were examined under conditions of pressure 14.7 MPa, LHSV 1.5 h~(-1) and H_2/oil 1600 vol/vol. Experimental results showed that 385℃ was the suitable temperature for production of gasoline. At this temperature, conversion of>180℃ distillate reached 89w%, and a 87w% yield of gasoline fraction was obtained with 2.9 w% hydrogen consumption.The composition and properties of hydrocracking products were also analyzed in detail. The quality of the gasoline fraction met RQ-75(GB484-77) specificatio(?0 substantially with octane number 75. The gasoline fraction is capable of producing high-octane blend by reforming.Possessing more than 75w% of potential aromatic content and less than 0.5ppm of nitrogen content, the C_6-145℃ product is an excellent BTX reforming stocks. 采用镍、钼催化剂,在实验室固定床反应装置上考察了反应温度对煤液化中油馏分加氢裂化转化率、产品分布和组成以及氢耗的影响。制取汽油产品的适宜反应温度为385℃,在此温度下,大于180℃馏分的转化率为90w%,汽油收率可达87w%,辛烷值为74.9,化学氢耗量为2.9w%。本文对加氢裂化产品的组成和性质进行了分析,产品C_6—145℃馏分中的芳烃潜含量高达77w%,是理想的重整原料。 This paper presents the experimen results of the catalytic cracking/reforming of a heary crude oil over the HZSM-5 catalyst. The conversion of the crude oil reached 60~80%within the reaction temperature range of 450~550℃and 1.8~4.2h~(-1) WHSV at atmospheric pressure. The yields of the gasoline range products reached 40~55%, which contained 70~85% aromatics. This paper also discussed the reaction mechanism and proposed a two-step reaction for the catalytic cracking/reforming of heavy hydrocarbons over the HZSM-5... This paper presents the experimen results of the catalytic cracking/reforming of a heary crude oil over the HZSM-5 catalyst. The conversion of the crude oil reached 60~80%within the reaction temperature range of 450~550℃and 1.8~4.2h~(-1) WHSV at atmospheric pressure. The yields of the gasoline range products reached 40~55%, which contained 70~85% aromatics. This paper also discussed the reaction mechanism and proposed a two-step reaction for the catalytic cracking/reforming of heavy hydrocarbons over the HZSM-5 catalyst. 本文考察了重质原油在HZSM-5分子筛催化剂上直接催化裂解/重整反应的试验情况.在反应温度为400℃~600℃,重量空速为1.0~5.0h~(-1),常压下原油的转化率可达60~80%,汽油产品的收率可达40~55%,它的芳烃含量高达70~85%,焦炭产率在5%以下.同时也探讨了重质油品在HZSM-5分子筛催化剂上的两步式裂解/重整反应机理. This article describes an explosion-proof saturated vapor pressure on-line analyzer,type ZXZ-Ⅰ, which is suitable for use in refineries to continuously monitor the va- por pressure of gasoline or other light fractions. Several years of field application has verified that the performance of this analyzer has reached or exceeded the technical level of the same kind analyzers available both in China and abroad. It has passed the technical appraisal of SINOPEC and is important for refineries to assure the quality... This article describes an explosion-proof saturated vapor pressure on-line analyzer,type ZXZ-Ⅰ, which is suitable for use in refineries to continuously monitor the va- por pressure of gasoline or other light fractions. Several years of field application has verified that the performance of this analyzer has reached or exceeded the technical level of the same kind analyzers available both in China and abroad. It has passed the technical appraisal of SINOPEC and is important for refineries to assure the quality of their gasoline product and to increase the yield of light fractions. 本文介绍了一种适用于炼油厂,对汽油或轻质组分的饱和蒸气压进行连续监测的防爆型在线分析仪表ZXZ-1。经多年的现场运行实践证明,该分析仪各项技术性能指标均达到并超过了当前国内外同类仪表的水平,通过了中国石化总公司技术鉴定。该仪器对保证汽油产品的质量,提高轻质油收率均有重要意义。
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