Journal
MOLECULAR CATALYSIS
Volume 445, Issue -, Pages 240-247Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.mcat.2017.11.032
Keywords
Hydrolysis; alpha-Cellulose; HZSM-5; Si/Al ratio; Ultrasonic
Categories
Funding
- National Natural Science Foundation of China [21433001, 21406251, 21403265, 31470609]
- 13th Five-Year the National key RD projects [2017YFD0600805]
- Young Taishan Scholars Program of Shandong Province [tsqn20161052]
Ask authors/readers for more resources
The catalytic behavior of a series of MFI catalysts with different Si/Al ratio (25-300) in the direct aqueous-phase hydrolysis of alpha-cellulose was studied. The effects ultrasonic pretreatment time, ZnCl2 content, zeolite pore structure and acid-basic properties on catalyst activity and products distribution were systematically investigated. The results indicated that HZSM-5 with lower Si/AI ratio was beneficial for production of glucose and LA from alpha-cellulose. Ultrasonic pretreatment could decrease the degree of crystallinity and polymerization of alpha-cellulose, enhance the accessibility of acid sites and ZnCl2 to the loosened amorphous regions of alpha-cellulose in water, and improve the hydrolysis efficiency of alpha-cellulose. The desilicated ZSM-5 (HZSM-5-DS(0.2)) showed much higher catalytic activities as compared to commercial ZSM-5 and alpha-cellulose conversion reached 76.5% over HZSM-5-DS(0.2) at 200 degrees C. Catalytic conversion of alpha-cellulose consisted of at least three important parallel reactions under the present hydrothermal conditions and a plausible pathway was proposed. Effective control of these reactions would be helpful to further maximize the target product yield during the catalytic conversion of alpha-cellulose. (C) 2017 Elsevier B.V. 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