Hot Compressed Water Extraction of Lignin by Using a Flow-Through Reactor

Siti Machmudah; Wahyudiono Wahyudiono; Hideki Kanda; Mitsuru Sasaki; Motonobu Goto

doi:10.4186/ej.2015.19.4.25

Hot Compressed Water Extraction of Lignin by Using a Flow-Through Reactor

Authors

Siti Machmudah Sepuluh Nopember Institute of Technology
Wahyudiono Wahyudiono Nagoya University
Hideki Kanda Nagoya University
Mitsuru Sasaki Kumamoto University
Motonobu Goto Nagoya University

DOI:

https://doi.org/10.4186/ej.2015.19.4.25

Keywords:

Biomass, Extraction, Lignin, Rice straw, Subcritical.

Abstract

Japanese rice straw, an agricultural by-product, was utilized for the extraction of lignin by hot compressed water at temperatures of 443 - 503 K and a pressure of 4.0 MPa using a flow-through system, a simple and environmentally friendly extraction method requiring no chemicals other than water. Under these conditions, thermal softening of the Japanese rice straw occurred, allowing the removal of lignin via depolymerization reactions. Lignin as an extraction product was analyzed using utraviolet-visible (UV-vis) spectrophotometry. Lignin recovery approached 85% when the extraction was performed at 443 and 473 K with a flow rate of 4.67 ml min^-1. At a constant residence time, recovery amounts increased with increasing flow rate at each temperature. The results suggested that this process may result in an advanced plant biomass components extraction technology.

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Author Biographies

Siti Machmudah
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Department of Chemical Engineering, Sepuluh Nopember Institute of Technology, Kampus ITS, Surabaya 60111, Indonesia

Wahyudiono Wahyudiono
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Department of Chemical Engineering, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8603, Japan

Hideki Kanda
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Department of Chemical Engineering, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8603, Japan

Mitsuru Sasaki
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Graduate School of Science and Technology, Kumamoto University, 2-39-1 Kurokami, Kumamoto 860-8555, Japan

Motonobu Goto
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Department of Chemical Engineering, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8603, Japan

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Published In

Vol 19 No 4, Jul 31, 2015

How to Cite

[1]

S. Machmudah, W. Wahyudiono, H. Kanda, M. Sasaki, and M. Goto, “Hot Compressed Water Extraction of Lignin by Using a Flow-Through Reactor”, Eng. J., vol. 19, no. 4, pp. 25-44, Jul. 2015.

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