银、镧改性混合型吸热碳氢燃料裂解分子筛催化剂的研究

为提高吸热型碳氢燃料的吸热能效，制备了吸热型碳氢燃料NNJ-150和银、镧 离子交换改性USY，ZSM-5分子筛及混合分子筛，考察了NNJ-150在USHY，HZSM-5和 二者混合物以及银、镧改性混合分子筛催化剂上的裂解情况。结果表明，NNJ-150 在Ag-LaUSY + Ag-LaZSM-5（75：25）混合分子筛上裂解时，低碳烯烃选择性较高 （600 ℃，47.92%），催化剂寿命较长(35 min以上），催化性能比较稳定，可满 足冷却高超音速飞行器的要求。

Study of Cracking Catalysts of Mixed Zeolites Modified by Ag and La to Endothermic Hydrocarbon Fuels

In order to improve endothermic ability of endothermic hydrocarbon fuel, the endothermic hydrocarbon fuel NNJ-150 and the catalysts mixed with USY and ZSM-5 which have been modified by La~(3+) and Ag~+ were prepared. NNJ-150 cracked on USHY, HZSM-5, their mixture and mixed zeolite catalysts modified by Ag~+ and La~(3+) was studied. Results show that the selectivity of light olefins is high (600 ℃, 47.92%), the lifetime of catalyst is long (above 35 min, 500 ℃), and the performance of catalyst is stable when NNJ-150 is cracked on Ag-LaUSY + Ag-LaZSM-5 (75:25). It can satisfy the need of cooling high supersonic craft.