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Received April 11, 2018
Accepted May 16, 2018
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초본계 바이오매스의 물리-화학적 유기용매 전처리 공정
Physico-Chemical Pretreatment of Herbaceous Biomass by Organosolv Flow-Through Process
경기대학교 화학공학과, 16227 경기도 수원시 영통구 광교산로 154-42
Department of Chemical Engineering, Kyonggi University, 154-42, Gwanggyosan-ro, Yeongtong-gu, Suwon-Si, Gyeonggi-Do, 16227, Korea
Korean Chemical Engineering Research, August 2018, 56(4), 441-446(6), 10.9713/kcer.2018.56.4.441 Epub 2 August 2018
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Abstract
초본계 바이오매스는 목본계 바이오매스에 비해 구조가 견고하지 않아 화학적 전환이 용이하다. 하지만 당질계 바이오매스에 비해 리그닌이 많아 전처리가 필수적으로 요구된다. 오르가노솔브는 리그닌과 같은 효소당화에 저해가 되는 물질을 분별하기 쉬우며 특히 에탄올과 같은 낮은 분자량의 용매는 증류를 통해 재사용이 용이하다는 장점이 있다. 한편 침출식 전처리 공정은 기존의 회분식 공정에서 문제점으로 언급되었던 분별된 성분들의 재결합 현상을 방지할 수있고 고-액 분리가 용이하다는 장점이 있으며, 향후 스케일업에도 유리하다. 아직까지는 바이오알코올 생산 공정 중 전처리 과정에서 소모되는 에너지 비용이 크기 때문에 본 연구의 전처리에서는 촉매 없이 에탄올만을 이용해 부가공정의 발생을 줄이려고 했다. 침출식 전처리는 150~190 °C에서 30~99.5 wt% 에탄올을 이용하여 20~60분 동안 수행되었다. 높은 반응온도와 긴 반응시간은 에너지 소모가 크기 때문에 물리적 전처리 방법과의 연계를 적용하여 에너지 저감의 가능성을 알아보았다.
Herbaceous biomass is easier at chemical conversion than woody biomass. However, pretreatment must be needed because it has substantially lignin. Organsolv is good at fractionation of enzymatic hydrolysis inhibitors such as lignin and it is reusable by distillation when it has low molecular weight. Flow-through process can prevent recondensation of fractionated components and easily separate liquid from the biomass. In this study, the pretreatment was performed for decreasing additional process by using ethanol without catalyst because this process has a lot of operation expense at bio-alcohol production process. Flow-through pretreatment was performed at 150~190 °C with 30~99.5 wt% ethanol during 20~60 minutes. Also the phsyco-chemical pretreatment was performed for decreasing reaction time and temperature.
Keywords
References
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