alexa Dissolution Model of Ball Milled Rice Straw Particles in 1-Ethyl-3-Methyl Imidazolium Acetate at Elevated Temperature
ISSN: 2155-9821

Journal of Bioprocessing & Biotechniques
Open Access

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Research Article

Dissolution Model of Ball Milled Rice Straw Particles in 1-Ethyl-3-Methyl Imidazolium Acetate at Elevated Temperature

Hlaing Hlaing Myint1,2, Winarto Kurniawan1, Hirofumi Hinode1, Ni Ni Sein2, Chris Salim3 and Jeffrey S Cross1*
1Department of International Development Engineering, Tokyo Institute of Technology, Meguro-Ku Tokyo, Japan
2Department of Chemistry, University of Yangon, 11041 Kamayut, Yangon, Myanmar
3Environmental Engineering, Surya University, Tangerang, Indonesia
Corresponding Author : Jeffrey S Cross
Department of International Development Engineering
Tokyo Institute of Technology
2-12-1 Ookayama, Meguro-Ku Tokyo, Japan
Tel: +81-3-5734-3723
E-mail: [email protected]
Received November 09, 2015; Accepted November 23, 2015; Published November 27, 2015
Citation: Myint HH, Kurniawan W, Hinode H, Sein NN, Salim C, et al. (2015) Dissolution Model of Ball Milled Rice Straw Particles in 1-Ethyl-3-Methyl Imidazolium Acetate at Elevated Temperature. J Bioprocess Biotech 5:260 doi:10.4172/2155-9821.1000260
Copyright: © 2015 Myint HH, et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
 

Abstract

In Asia, rice straw residue left in fields after harvest is often burned which causes air pollution or anaerobically digested in the rice patty moist soil to yield methane a greenhouse gas. Effective and efficient process strategies are needed to convert straw into fuels and feedstock’s which do not harm the environment. As a result, this study was undertaken to liquefy Japanese rice straw (RS) an abundant agricultural residue into a liquid after pre-treatment by ball-milling at various temperatures and develop a bioprocess model. Specifically, RS was ball milled into 75-100 μm size particles at temperatures of 60°C, 25°C, and -196°C (cryogenically) and dissolved by heating in 1-ethyl-3- methylimidazolium acetate [Emim][OAc] at different temperatures between 120° 140° and 160°C to understand the interactions between the process parameters. The milled RS powder particles were characterized by FTIR, XRD, BET analyzer and dissolution follow using optical microscopy. The particle dissolution was analyzed by measuring the particle light intensity ratio and particle cross-sectional area as a function of heating time. Higher milling temperature leads to amorphization of the RS cellulose accelerating dissolution. Measurement of the particle light intensity ratio was used to estimate the rice straw particles dissolution endpoint. A particle dissolution model indicated that ball milling temperature and [Emim][OAc] heating temperature strongly interacts influencing the dissolution time. To dissolve RS in [Emim][OAc] quickly, it important to reduce the crystallinity of the cellulose and increase the particle surface area by milling at higher temperature. It is believed this model would have applications to other biomass dissolution processes.

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