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首页> 外文期刊>Catalysis Surveys From Japan >ZSM-5 Zeolite Based Additive in FCC Process: A Review on Modifications for Improving Propylene Production
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ZSM-5 Zeolite Based Additive in FCC Process: A Review on Modifications for Improving Propylene Production

机译：FCC工艺中ZSM-5沸石基添加剂：改进丙烯生产的改性研究综述

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摘要

Propylene is a very essential building block in the petrochemical industry. There is a fast growing in its demand that is steadily expanding its market. Fluid catalytic cracking units is the second largest propylene source for petrochemical application. FCC units are primarily used in the production of gasoline. However, refiners have taken advantage with the aim of producing and recovering large amounts of propylene from their Fluid catalytic cracking unit by raising the severity of reaction through riser temperature, installation of a propylene recovery unit and addition of a catalyst that is shape selectivity. ZSM-5 is nowadays used as a very efficient fluid catalytic cracking additive for increasing light olefins production i.e. propylene. This short review will be exclusively focused on ZSM-5-containing additives and look at the main strategies used in the design and modifications of ZSM-5 catalysts to increase the propylene production in the FCC units. The review will highlight the most important and the recent modification methods used in enhancing ZSM-5 performance in the FCC process to maximize the yield of light olefins in general, and in particular that of propylene. These methods include particle size and acidity modification, phosphorus treatment, mesoporous/hierarchical structure creation, incorporation alkali metals and some selected transition metals and introduction of rare-earth metal.
机译：丙烯是石化工业中非常重要的组成部分。它的需求快速增长，正在稳步扩大其市场。流化催化裂化装置是石油化工应用中的第二大丙烯来源。 FCC装置主要用于生产汽油。然而，精炼商已经利用通过通过提升管温度提高反应的严重性，安装丙烯回收单元和添加形状选择性的催化剂来从其流化催化裂化单元生产和回收大量丙烯的目的。如今，ZSM-5用作提高轻质烯烃（即丙烯）产量的非常有效的流化催化裂化添加剂。这篇简短的评论将专门针对含ZSM-5的添加剂，并探讨设计和改进ZSM-5催化剂以增加FCC装置中丙烯产量的主要策略。审查将重点介绍在FCC工艺中用于增强ZSM-5性能的最重要和最新的改性方法，以使一般的轻质烯烃（尤其是丙烯）的收率最大化。这些方法包括粒径和酸度改性，磷处理，中孔/层级结构生成，掺入碱金属和某些选定的过渡金属以及引入稀土金属。

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