改性HZSM-5对油田轻烃的催化芳构化

Catalytic Aromatization of Light Hydrocarbons over Modified HZSM 5

介绍了非贵金属改性ＨＺＳＭ５催化剂用于油田轻烃芳构化的结果．ＨＺＳＭ５中Ｇａ的质量分数存在最佳值，此时芳烃和氢气收率最大．向Ｇａ／ＨＺＳＭ５中分别添加Ｃｒ，Ｎｉ和Ｚｎ后，芳构化效果提高；Ｃｒ，Ｚｎ的脱氢功能比Ｎｉ强，但氢解活性从强到弱依次为Ｎｉ，Ｃｒ，Ｚｎ．研制了非贵金属改性的ＨＺＳＭ５油田轻烃芳构化催化剂Ｄ７６９，以含硫质量分数为２．９７×１０－４的油田轻烃为原料，在１０ｍＬ反应装置上运行１００ｈ，芳烃平均收率为５３．３％，表明芳构化催化剂Ｄ７６９有良好的活性稳定性、芳构化活性及抗硫能力．

To present the results of aromatization of light hydrocarbons from oil field over HZSM 5 modified with non noble metals. With respect to the yields of aromatic hydrocarbons and hydrogen, there is an optimum loading amount of Ga on HZSM 5. The yield of aromatic hydrocarbons is increased with loading Cr, Zn and Zi on Ga/HZSM 5 respectively. Dehydrogenating activities of these metals follow Ni>Cr>Zn. A catalyst is prepared for aromatization of the light hydrocarbons. With the catalyst (denoted as D769), a run of 1 000 h was carried out on a 10 mL scale unit with the light hydrocarbons as the feed. The average yield of aromatic hydrocarbons is 53.3%, indicating the catalyst has good properties of stable activity, aromatizibility and anti poisoning by sulfur containing compounds.