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- Title
Reaction characteristics of maximizing light olefins and decreasing methane in C<sub>5</sub> hydrocarbons catalytic pyrolysis.
- Authors
Mei-Jia Liu; Gang Wang; Shun-Nian Xu; Tao-Ran Zheng; Zhong-Dong Zhang; Sheng-Bao He
- Abstract
When converting C5 hydrocarbons to light olefins by catalytic pyrolysis, the generation of low valueadded methane will affect the atomic utilization efficiency of C5 hydrocarbons. To improve the atomic utilization efficiency, different generation pathways of light olefins and methane in the catalytic pyrolysis of C5 hydrocarbons were analyzed, and the effects of reaction conditions and zeolite types were investigated. Results showed that light olefins were mainly formed by breaking the C2-C3 bond in the middle position, while methane was formed by breaking the C1-C2 bond at the end. Meanwhile, it was discovered that the hydrogen transfer reaction could be reduced by about 90% by selecting MTT zeolite with 1D topology and FER zeolite with 2D topology under high weight hourly space velocity (WHSV) and high temperature operations, thus leading to the improvement of the light olefins selectivity for the catalytic pyrolysis of n-pentane and 1-pentene to 55.12% and 74.60%, respectively. Moreover, the fraction ratio of terminal C1-C2 bond cleavage was reduced, which would reduce the selectivity of methane to 6.63% and 1.83%. Therefore, zeolite with low hydrogen transfer activity and catalytic pyrolysis process with high WHSV will be conducive to maximize light olefins and to decrease methane.
- Subjects
ALKENES; HYDROGEN transfer reactions; PYROLYSIS; HYDROCARBONS; METHANE; COORDINATION polymers
- Publication
Petroleum Science (KeAi Communications Co.), 2023, Vol 20, Issue 3, p1909
- ISSN
1672-5107
- Publication type
Article
- DOI
10.1016/j.petsci.2022.11.026