Journal
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
Volume 45, Issue 51, Pages 26929-26937Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ijhydene.2020.05.235
Keywords
Ex-situ; Co-pyrolysis; Aromatic hydrocarbons; BTX; Alkali treatment
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Funding
- National Natural Science Foundation of China [31670599]
- State Forestry Bureau 948 project, China [2013-4-08]
- Major Project of Scientific Research Foundation
- Department of Education, Yunnan Province [ZD2014012, 201803270033]
- Chinese Scholarship Council (CSC)
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To improve the effective hydrogen-to-carbon ratio (H/Ceff) of a substrate, ex-situ catalytic co-pyrolysis of hydrogen donors and wood over ZSM-5 was conducted. The co-feeding of methanol and wood greatly increased the total aromatic content from 79.00% to 91.79% and the BTX content from 21.62% to 61.63%. To further improve the catalytic properties of ZSM-5, desilication with a Na2CO3 solution was applied. Treatment with the Na2CO3 solution gently removed the Si from ZSM-5, decreased the Bronsted site density, but created more mesopores, improving the accessibility of Bronsted sites in the pores and the diffusion properties of ZSM-5. Desilication of ZSM-5 with a 0.4 mol/L Na2CO3 solution increased the desirable BTX content from 61.63% to 66.35% and reduced the polycyclic aromatic content from 11.92% to 9.72%. (C) 2020 Published by Elsevier Ltd on behalf of Hydrogen Energy Publications LLC.
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