利用水热法合成了形貌相似、硅铝摩尔比不同的HZSM-5分子筛，通过XRD、SEM、XRF、N₂-吸附/脱附、NH₃-TPD和FT-IR方法对其进行表征，并在固定床反应器中对其催化裂解Lurgi甲醇制丙烯（MTP）工艺副产轻质油性能进行了评价。结果表明，硅铝摩尔比低的HZSM-5分子筛具有更多的B酸酸量、L酸酸量及总酸酸量，这是其具有低温高活性及较低的乙烯和丙烯产率的主因。提高HZSM-5分子筛催化剂的硅铝摩尔比，有利于增加乙烯和丙烯的产率，且芳烃产率降低。反应温度和重时空速对Lurgi MTP副产轻质油催化裂解产物有明显影响。乙烯和丙烯产率随着反应温度的提高先增加后降低。增加重时空速，催化裂解中间产物组成上也发生了较大变化。低的重时空速有利于多产低碳烯烃，适宜的重时空速在1.5~3.0 h^-1左右，乙烯和丙烯产率达到最高值55.36%。

In conventional hydrothermal system, HZSM-5 molecular sieves with similar morphology and different SiO₂/Al₂O₃ molar ratios are synthesized and characterized by means of XRD, SEM, XRF, nitrogen adsorption/desorption, NH₃-TPD and FT-IR, respectively.Their performance in catalytic cracking by-product light oil from Lurgi methanol to propylene (MTP) process are evaluated in a fixed bed reactor.The results indicate that HZSM-5 catalyst with lower SiO₂/Al₂O₃ molar ratio has more Brönsted (B) and Lewis (L) acid sites, as well as total acid sites, which is the main reason that such catalyst has the advantages of high reaction activity at low temperature and the disadvantages of low ethylene and propylene yields.The yields of ethylene and propylene over HZSM-5 catalyst with higher SiO₂/Al₂O₃ molar ratio are higher than that of HZSM-5 catalyst with lower SiO₂/Al₂O₃ molar ratio, while the yield trend of aromatics is contrary.The reaction temperature and the weight hourly space velocity (WHSV) can affect significantly the product distributions.The yields of ethylene and propylene passes through a maximum with increasing reaction temperature.The increase of WHSV also has impact on the composition of the intermediate products.A low WHSV is beneficial to producing low carbon olefins.The suitable WHSV is in the range of 1.5-3.0 h^-1, which can make the maximum combining yield of ethylene and propylene achieve 55.36%.