在HTO过程中,一个简单的策略来制备基于ZSM-5的复合材料,在HTO过程中增强轻olefin选择性和稳定性
Maryam Ghazimoradi1, Saeed Soltanali1, Hamid Karami1
1Catalysis Technologies Development Division, Research Institute of Petroleum Industry (RIPI) Tehran Iran soltanalis@ripi.ir.
RSC advances
|July 6, 2023
概括
A2催化剂,ZSM-5与γ-合物的复合物,显著增强了n-hexane裂变为olefins的作用. 由于稳定性和酸度的提高,它实现了高转换率和较轻的烯酸产量.
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:
- ZSM-5复合材料对于n-hexane催化裂变至关重要.
- 优化催化剂成分是改善烯酸产量和选择性的关键.
- 了解支持材料对ZSM-5性能的影响至关重要.
研究的目的:
- 研究各种ZSM-5复合材料在n-hexane催化裂变中的性能.
- 确定最佳的ZSM-5复合物,以最大限度地提高轻型烯的产量.
- 阐明结构-活动关系控制催化剂性能.
主要方法:
- 使用XRD,FT-IR,NH3-TPD,BET,FE-SEM和TG进行催化剂表征.
- 在550°C的固定床微反应器中进行n-hexane催化裂变实验.
- 分析产品的分布,转化,选择性和焦炭的形成.
主要成果:
- A2催化剂 (用γ-的ZSM-5) 呈现出最高的n-hexane转化率 (98.89%).
- 甲2催化剂显示出优越的烯选择性 (68.92%) 和轻的烯产量 (83.84%).
- γ-的支持增强了热水稳定性,酸度和中等度,从而减少了焦化.
结论:
- 作为支材料的γ-显著提高了ZSM-5在n-hexane裂变中的性能.
- 催化剂的物理化学特性,受成分和挤出的影响,决定了产品的分布.
- A2催化剂是从n-hexane中选择性轻型烯生产的高效材料.
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