Progress Report on Research on Methanol to Olefins Catalysts Published by Dalian Institute of ChemicalsRecently, Liu Zhongmin and Tian Peng, the National Engineering Laboratory for Methanol to Olefins of the Dalian Institute of Chemical Physics, Chinese Academy of Sciences, published a progress report entitled Recent Progress in Methanol-to-Olefins (MTO) Catalysts.
Methanol to olefins (MTO), as an important C1 chemical reaction, provides an efficient way to produce basic chemicals for non-oil resources such as coal and natural gas. MTO catalyst is one of the key elements of the process development, which directly determines the process flow, reactor form and profitability of MTO technology. Since 2010, the team led by Liu Zhongmin has completed the industrialization and industrialization of millions of tons of methanol-to-olefin (DMTO) technology, and promoted the development of China's coal-to-olefins strategic industry. In recent years, the team's research work has focused on an in-depth understanding of the methanol olefins reaction mechanism, the development of a new generation of DMTO catalysts and a new generation of DMTO technology. The progress report first reviewed the development process of DMTO catalysts in Dalian Institute of Chemical Physics, and proposed the scientific problems and challenges in developing high-performance MTO catalysts. Based on the understanding of the methanol-to-olefin reaction mechanism, the optimized MTO catalysts were analyzed and summarized, especially Feasible pathways and latest research progress of SAPO-34 molecular sieve catalyst. The report also describes the research progress of catalysts with high propylene or high ethylene selectivity molecular sieves. Finally, the report summarizes and forecasts the development prospects and efforts of the MTO catalyst.
In recent years, the research team has developed new methods for the synthesis of various SAPO molecular sieve catalysts. For the first time, the synthesis of SAPO molecular sieves by amine thermal method was carried out, and a variety of new template reagents for synthesizing SAPO-34 were found (J. Mater. Chem. A, 2013); the synthesis of Top-down method, double template method and reconstruction method was developed. Nanocrystalline and multi-stage porous SAPO molecular sieves with special morphology (Chem. Commun., 2014; J. Mater. Chem. A, 2015; Chem. Commun., 2016; Chem. Commun., 2017; Chem. Commun. , 2018), significantly improved the MTO catalytic performance of molecular sieves (ACS catalysis, 2015; ACS catalysis, 2019). Based on the above work, the research team completed the development of a new generation of DMTO catalysts, which was industrialized in October 2018 and successfully applied to a million-ton DMTO unit, showing a significantly improved yield of low-carbon olefins.
The above work was funded by the National Natural Science Foundation of China and the Frontier Science Key Research Project of the Chinese Academy of Sciences, and was recently published in Advanced Materials.