Abstract: The aromatization of the butylenes in C4 liquefied petroleum gas (LPG) over a nano-sized ZSM-5 zeolite catalyst, denoted DLG-1, was studied at a mild temperature. Emphasis was given to the influence of feed impurities and reaction conditions,such as reaction temperature, pressure, weight hourly space velocity of LPG(WHSV LPG) on the activity and stability of the aromatization catalyst. The results showed that, both diene and alkaline nitrogen-containing compounds had negative influence on the aromatization stability of the catalyst. Comparatively, the negative influence of the alkaline nitrogen-containing compounds (mainly in the manner of strong chemisorption on the acid sites) was much stronger than that of diene. On the other hand, reaction temperature, pressure and WHSV LPG also showed significant influence on the performance of the catalyst. The optimum reaction conditions were 450℃, 2. 0 MPa and WHSV LPG 0. 83 h-1. A high coking rate of the catalyst was observed when higher temperature,higher pressure and higher WHSV LPG were used.

摘要： 用小型固定床加压反应器研究了液化石油气（C4 LPG）中的丁烯在纳米ZSM-5型催化剂DLG-1上的低温芳构化反应，重点考察了原料中二烯烃和碱性氮杂质，以及反应温度、压力和C4 LPG进料重量空速（WHSV LPG）条件对催化剂芳构化反应活性及稳定性的影响。结果表明：原料中的二烯烃和碱性氮杂质都能加速催化剂失活，其中碱性氮的失活作用比二烯烃大。反应温度、压力和进料重量空速都对催化剂性能有显著影响，最佳反应条件为450℃、2. 0 MPa和WHSV LPG=0. 83 h-1。反应温度、压力和进料空速过高都会导致催化剂积炭失活速度加快。