Journal
CHEMICAL ENGINEERING SCIENCE
Volume 250, Issue -, Pages -Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ces.2022.117426
Keywords
Olefins transformation; Light olefins; MTO; SAPO-34; Kinetic model
Categories
Funding
- National Natural Science Foundation of China [22008152]
- Key Technology Project of Inner Mongolia, China [2019GG311]
Ask authors/readers for more resources
This study investigates the transformation mechanism of C3-C6 olefins on SAPO-34 catalyst without methanol co-feeding. A reaction network is constructed and validated, providing accurate predictions of product distribution.
The current studies on SAPO-34 catalyzed MTO process are generally based on the hydrocarbon-pool mechanism, in which the individual olefin is generated in parallel by the competing reactions without interconversion of the resulted olefins. This situation is surely oversimplified and makes the reaction mechanism confusing. In this work, we investigated C-3-C-6 olefins transformation over SAPO-34 without methanol co-feeding to examine whether the oligomerization-cracking mechanism is applicable. Conversion pathways for individual olefin were discriminated with dimer-, trimer-, even tetramerization, by using Delplot analysis. The final reaction network was constructed with 11 reactions and a satisfactory correlation was achieved. Further validation tests were carried out by feeding C-4 and C-5 olefins mixture with excellent prediction performance obtained for the main product distribution, and comparison between SAPO-34 and ZSM-5 was done for a C-4. olefin feeding case, showing that SAPO-34 was much superior to ZSM-5 for higher olefin cracking.(C) 2022 Elsevier Ltd. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available