Analysis of secondary reactions in concentrated sulfuric acid hydrolysis of hollocellulose by 1H-NMR spectroscopy

Jai-Sung Lee; Soo-Jeong Shin

doi:10.7584/ktappi.2014.46.3.037

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2014 Vol.46, Issue 3 Preview Page Next Page

Analysis of secondary reactions in concentrated sulfuric acid hydrolysis of hollocellulose by ¹H-NMR spectroscopy ¹H-NMR 분광분석을 통한 진한 산 가수분해 반응 2차 반응 조건 분석

30 June 2014. pp. 37-43

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Abstract

Kinetics of holocellulose hydrolysis in concentrated sulfuric acid was analyzed using ¹H-NMR spectroscopy with different reaction time, temperature and acid concentration in secondary hydrolysis. In this work, reaction condition of secondary hydrolysis was similar to concentrated sulfuric acid process with electrodialysis or simulated moving bed chromatography process for sulfuric acid recycling. By ¹H-NMR spectroscopy, acid hydrolyzates from higher secondary acid hydrolysis (25-35% acid concentration) was successfully analyzed without any difficulties in neutralization or adsorption of acid hydrolyzate to solid salt. Higher acid concentration, higher temperature and longer reaction time led to more cellulose for glucose conversion but accompanied with glucose to galactose isomerization, glucose to unknown compounds and degradation of glucose to organic acid via furans.

Keywords

glucose

¹H-NMR

concentrated acid

Avicel

hydrolysis

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Information

Publisher :Korea Technical Association of The Pulp and Paper Industry
Publisher(Ko) :한국펄프종이공학회
Journal Title :Journal of Korea TAPPI
Journal Title(Ko) :펄프종이기술
Volume : 46
No :3
Pages :37-43
Received Date : 2014-05-20
Revised Date : 2014-06-10
Accepted Date : 2014-06-11
DOI :https://doi.org/10.7584/ktappi.2014.46.3.037

Journal of Korea TAPPI ISSN:0253-3200(Print) 펄프종이기술

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