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Open AccessArticle

Performance Enhanced SAPO-34 Catalyst for Methanol to Olefins: Template Synthesis Using a CO2-Based Polyurea

1
The Key Laboratory of Low-Carbon Chemistry & Energy Conservation of Guangdong Province/State Key Laboratory of Optoelectronic Materials and Technologies, Sun Yat-Sen University, Guangzhou 510275, China
2
School of Chemical Engineering and Technology, Sun Yat-Sen University, Guangzhou 510275, China
*
Authors to whom correspondence should be addressed.
Catalysts 2019, 9(1), 16; https://doi.org/10.3390/catal9010016
Received: 20 November 2018 / Revised: 9 December 2018 / Accepted: 17 December 2018 / Published: 28 December 2018
(This article belongs to the Special Issue Heterogeneous Acid Catalyst)
Introducing mesopores into the channels and cages of conventional micropores CHA (Chabazite) topological structure SAPO-34 molecular sieves can effectively improve mass transport, retard coke deposition rate and enhance the catalytic performance for methanol to olefins (MTO) reaction, especially lifetime and olefins selectivity. In order to overcome the intrinsic diffusion limitation, a novel CO2-based polyurea copolymer with affluent amine group, ether segment and carbonyl group has been firstly applied to the synthesis of SAPO-34 zeolite under hydrothermal conditions. The as-synthesized micro-mesoporosity SAPO-34 molecular sieve catalysts show heterogeneous size distribution mesopores and exhibit slightly decrease of BET surface area due to the formation of defects and voids. Meanwhile, the catalysts exhibit superior catalytic performance in the MTO reaction with more than twice prolonged catalytic lifespan and improvement of selectivity for light olefins compared with conventional microporous SAPO-34. The methodology provides a new way to synthesize and control the structure of SAPO-34 catalysts. View Full-Text
Keywords: molecular sieves; SAPO-34; MTO; CO2-based polyuria; mesoporogen molecular sieves; SAPO-34; MTO; CO2-based polyuria; mesoporogen
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MDPI and ACS Style

Yu, Y.; Qin, J.; Xiao, M.; Wang, S.; Han, D.; Meng, Y. Performance Enhanced SAPO-34 Catalyst for Methanol to Olefins: Template Synthesis Using a CO2-Based Polyurea. Catalysts 2019, 9, 16.

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