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Cellulose pretreatment and dissolution: Selection of solvent and processing conditions

Ghasemi, Mohammad; Vargas-Aponte, Luz V.; Tsianou, Marina and Alexandridis, Paschalis (2017) Cellulose pretreatment and dissolution: Selection of solvent and processing conditions. Speech at: 2017 AIChE Annual Meeting, Minneapolis, MN, United States, 29 Oct - 03 Nov 2017.

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Document available online at: https://aiche.confex.com/aiche/2017/meetingapp.cgi/Paper/500694


Efficient utilization of biomass is hindered by the recalcitrance to dissolution of semicrystalline cellulose. Pretreatment is often used to alter the structure of cellulosic biomass in order to make cellulose more accessible to solvents and enzymes. The pretreatment involves physical and/or chemical processing which affects the degree of crystallinity and size of biomass particles. We examine here the effects of (i) solvent properties, pretreatment steps and temperature, and (ii) fiber diameter and degree of crystallinity, on the kinetics of cellulose swelling and dissolution. To this end we have combined (a) experimental results on cotton fiber swelling, change in crystallinity and dissolved amount when treated under different solvent conditions, with (b) a phenomenological model that accounts for the phenomena governing the dissolution of solid cellulose, e.g., solvent penetration, transformation from crystalline to amorphous domains, specimen swelling, and polymer chain untangling [1]. The insights obtained from this analysis would facilitate the rational selection of solvents and the design of pretreatment processes to reduce the size and degree of crystallinity of cellulosic biomass particles, leading to enhanced biomass utilization [2]. References: [1] Ghasemi, M.; Singapati, A. Y.; Tsianou, M.; Alexandridis, P., Dissolution of semicrystalline polymer fibers: Numerical modeling and parametric analysis. AIChE Journal 2017, 63 (4), 1368-1383. DOI: 10.1002/aic.15615. [2] Ghasemi, M.; Tsianou, M.; Alexandridis, P., Assessment of solvents for cellulose dissolution. Bioresource Technol. 2017, 228, 330-338. DOI: 10.1016/j.biortech.2016.12.049.

EPrint Type:Conference paper, poster, etc.
Type of presentation:Speech
Subjects:"Organics" in general
Knowledge management > Research methodology and philosophy > Research communication and quality
Environmental aspects
Research affiliation:USA
Deposited By: Ghasemi, Mohammad
ID Code:33554
Deposited On:24 Sep 2018 08:14
Last Modified:24 Sep 2018 08:14
Document Language:English
Refereed:Peer-reviewed and accepted

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