焦化/LDH复合材料作为轻型烯酸生产的添加剂,采用重油碎片的催化裂解方法
Chadatip Rodaum1, Chularat Wattanakit1, Avelino Corma2
1Department of Chemical and Biomolecular Engineering, School of Energy Science and Engineering, Vidyasirimedhi Institute of Science and Technology, Rayong 21210, Thailand.
一种新的Z5-LDH复合材料增强了重油催化裂变中的轻烯酸生产. 这种添加剂通过降低酸度和增加度来提高对C3-C4烯的选择性,优于纯ZSM-5.
科学领域:
- 催化和化学工程 催化和化学工程
- 材料科学 材料科学 材料科学
背景情况:
- 重油的催化裂变对于生产轻油脂至关重要.
- 功能添加剂可以增强烯的选择性.
- 基于多层双氧化物 (LDH) 的材料具有可调节的特性.
研究的目的:
- 开发和评估ZSM-5和LDH复合物 (Z5-LDH) 作为重油催化裂解的新增剂.
- 调查Z5-LDH复合物的对轻烯 (C3-C4) 生产和选择性的影响.
- 了解管理增强性能的结构-活动关系.
主要方法:
- 一个核心外Z5-LDH复合材料的合成.
- 复合物的结构,酸度和基本度的表征.
- 在真空燃油 (VGO) 裂变中使用Z5-LDH作为添加剂的催化性能评估.
- 与纯ZSM-5和商用USY催化剂进行比较.
主要成果:
- 与纯ZSM-5相比,Z5-LDH复合材料的Brønsted酸度降低,表面基本度提高.
- 与商业催化剂 (11.3%) 相比,Z5-LDH添加剂显著增加了C3-C4烯酸含量 (17.2 wt%).
- 烯/和丁烯/丁烯的比率与Z5-LDH相比,与纯ZSM-5.
结论:
- Z5-LDH复合物有效地提高了重油催化裂变中的轻烯选择性.
- 减少的酸强度和表面基本性有助于最大限度地减少二次反应和氨酸再吸收.
- Z5-LDH复合物作为各种重型料的流体催化裂变 (FCC) 添加剂具有前景.
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