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Dissertation
Acid hydrolysis of corn stover in a concentrated slurry system
Doctor of Philosophy (Ph.D.), Drexel University
1984
DOI:
https://doi.org/10.17918/00007240
Abstract
The objective of this research was to characterize the hydrolysis kinetics of corn stover using sulfuric acid as the catalyst in a concentrated slurry. The kinetic data were obtained in a specially constructed continuous flow reactor with an in-line sampling system. The scope and range of experimental variables included temperature (200 to 220(DEGREES)C), acid concentration (0.3 to 1.4 N), liquid-to-solid ratio (1.75:1 to 7:1 ml/g) and reaction time (0 to 35 s). It is found that glucan hydrolysis follows a zero order kinetic in the range of experimental variables investigated. Both acid concentration and temperature increase the rate of glucan hydrolysis. A rate expression for glucan hydrolysis is developed both on the basis of adsorbed acid and bulk acid concentration. A kinetic model is proposed for the reaction: Glucan (-[right arrow]) Glucose (-[right arrow]) 5-hydroxymethyl-2-furaldehyde (-[right arrow]) Levulinic Acid and for the reaction: Glucose (-[right arrow]) Other degradation products. An integral approach is used to determine the parameters in the kinetic model and their numerical values are found to be comparable to those reported in the literature. It is found that at a given temperature, acid concentration and glucan conversion, there is an optimum liquid-to-solid ratio which maximizes glucose concentration. It is shown experimentally that glucan hydrolysis is not mass transfer limited at as low a liquid-to-solid ratio as 2.5:1.
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Details
- Title
- Acid hydrolysis of corn stover in a concentrated slurry system
- Creators
- Kwuang-Fo Teng
- Awarding Institution
- Drexel University
- Degree Awarded
- Doctor of Philosophy (Ph.D.)
- Publisher
- Drexel University; Philadelphia, Pennsylvania
- Number of pages
- xiii, 230 pages
- Resource Type
- Dissertation
- Language
- English
- Academic Unit
- College of Engineering (1970-2026); Drexel University
- Other Identifier
- 991021888875404721