通过对改性ZSM-5进行兴奋剂对n-hexane的催化裂变来增强轻烯的选择性
Muhammad Faryad Ali1, Mu He1, Muhammad Rizwan1
1School of Chemical Engineering, East China University of Science and Technology, Shanghai, China.
这项研究用和修改了ZSM-5催化剂,从n-hexane中选择性地产生轻烯酸. 双金属增强有效调整酸性部位,增强氨酸的选择性,同时最大限度地减少不必要的,和 (BTX) 生产.
科学领域:
- 催化剂是一种催化剂.
- 材料科学 材料科学 材料科学
- 化学工程是化学工程的重要组成部分.
背景情况:
- 纳夫塔是轻烯的关键原料,对于满足日益增长的需求至关重要.
- 使用ZSM-5进行n-hexane的催化裂变是一种能源高效的途径,可以轻松烯酸.
- 调整ZSM-5的酸性质对于优化选择性和催化剂性能至关重要.
研究的目的:
- 通过合兰 (La) 和 (P) 来修改ZSM-5,以调整其酸性质.
- 通过使用修改后的ZSM-5.5来研究n-hexane的选择性催化裂变,以产生轻烯酸.
- 为了优化催化剂组合,提高轻烯的选择性,减少,和 (BTX) 的形成.
主要方法:
- 采用湿浸方法修改了ZSM-5热带石,其中含有不同量的La和P.
- 鉴定技术包括XRD,NMR,NH3-TPD,Py-FTIR,ICP-OES,N2吸附-脱落,XPS和SEM. 这些技术是最重要的.
- 通过n-hexane裂变实验评估催化性能,分析转化和产品选择性.
主要成果:
- 添加兰 (0.25-1重量%) 改善了催化剂寿命和n-hexane转化 (高达99.7%),但较高的数量增加了BTX分数.
- 兴奋剂 (1重量%) 实现了64%的轻烯选择性,将BTX降低到2.3%,并将69%的n-hexane转化.
- 通过调整易斯酸位,双重修饰 (1P0.25LaZ5) 通过调整易斯酸位,产生了62%的轻olefin选择性和77%的n-hexane转化,只有3%的BTX.
结论:
- 通过P和La的双金属增强调节ZSM-5的酸度,有效控制BTX的生产.
- 在ZSM-5上优化的P和La负载增强了轻烯的选择性,同时保持了稳定的n-hexane转化.
- 这种方法提供了一个有前途的策略,可以从n-hexane有效地和选择性地生产轻型烯酸.
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