低碳烃在Ga/HZSM-5型催化剂上转化为芳烃的研究Ⅱ不同金属改性的Ga/HZSM-5催化剂  

STUDY ON AROMATIZATION OF LIGHT HYDROCARBONS OVER Ga/HZSM-5 CATALYSTS Ⅱ Ga/HZSM-5 MODIFIED BY VARIOUS METAL IONS

作　　者：朱华青[1] 翟效珍[1] 刘盛楹[1] 高志贤[1] 王建国[1] 

机构地区：[1]中国科学院山西煤炭化学研究所煤转化国家重点实验室,太原030001

出　　处：《燃料化学学报》1999年第S1期71-74,共4页Journal of Fuel Chemistry and Technology

摘　　要：采用Zn、Ni、Ag第二组分浸渍改性Ga/HZSM-5催化剂,并对其正己烷芳构化过程进行了研究。Ni作为第二组分使催化剂失活速度加快,而Zn、Ag的加入改善了催化剂的稳定性。Ag既有抑制与裂解活性和氢转移活性相关的酸性中心的作用,也有促进催化剂脱氢芳构化活性的作用,合适的Ag含量为05%。对GaAgZ(05)上催化重整抽余油芳构化过程的研究也表明Ag促进了催化剂的脱氢芳构化能力,提高了芳烃选择性。GaAgZ(05)在550℃,WHSV=05h-1下,以试剂正己烷为原料时,80h平均液体收率6963%,芳烃收率684%,氢产率47%,燃料气2567%;以催化重整抽余油为原料时,70h平均液体产品收率641%,芳烃收率为557%,H229%,燃料气330%。The aromatization of n-hexane on Ga/HZSM-5 catalysts modified by Zn, Ni, Ag was studied The addition of Zn and Ag improved the stability of the catalysts, while Ni accelerated the deactivation of Ga/HZSM-5 The loading of Ag not only inhibited the hydrocarcking and hydrogen transfer activity on acid sites but also promoted the dehydrogenation ability of Ga The best results were obtained with Ag content 0 5w% At reaction temperature 550℃ and WHSV 0 5h -1 , the following average yields were found on GaAg/HZSM-5(0 5) within 80 h on-stream: liquid products 69 63w%, aromatics 68 4w%, hydrogen 4 7% and fuel gas 25 67% For extractive raffinate oil conversion, the results were 64 1%, 55 7%, 2 9% and 33 0% respectively within 70 h on-stream

关 键 词：正己烷 重整抽余油 Ga/HZSM-5 浸渍改性 芳构化 

分 类 号：TQ241[化学工程—有机化工]