Imperial College London
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Prof Jason P. Hallett

Faculty of Engineering, Department of Chemical Engineering

Professor of Sustainable Chemical Technology
 
 
 
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Contact

 

+44 (0)20 7594 5388j.hallett Website

 
 
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Location

 

228bBone BuildingSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Anuchi:2022:10.1038/s41598-022-09629-4,
author = {Anuchi, S and Campbell, K and Hallett, J},
doi = {10.1038/s41598-022-09629-4},
journal = {Scientific Reports},
title = {Effective pretreatment of lignin-rich coconut wastes using a low-cost ionic liquid},
url = {http://dx.doi.org/10.1038/s41598-022-09629-4},
volume = {12},
year = {2022}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - Coconut husks and shells are underutilised agricultural feedstocks in the bio-based industry. These biomass wastes have a higher lignin content than other woody biomass and have excellent potential as raw materials for the production of lignin-based materials. This work demonstrates the performance of a low-cost protic ionic liquid, N,N,N-dimethylbutylammonium hydrogen sulfate ([DMBA][HSO4]), for ionoSolv pretreatment of coconut husk and shell at 150 °C for 45 – 90 minutes and 170 °C for 15 - 60 minutes. Optimum pretreatment conditions were observed at 170 °C and 45 minutes for both feedstocks. At these conditions, [DMBA][HSO4] was able to remove almost 77 wt.% of the lignin from the husk; leaving a cellulosic rich pulp behind, which released 82 % of the theoretical maximum glucose after enzymatic saccharification. The pretreated shell, by comparison, achieved 82 wt.% lignin removal and 89 % glucose yield and these higher values could be attributed to the highly porous structure of coconut shell cell walls. The cleavage of the β-O-4 aryl ether linkages of lignin followed by extensive C-C condensation in the lignin at longer pretreatment times was shown by HSQC NMR analysis. This extensive condensation was evidenced by molecular weights > 10 000 g/mol exhibited by lignin precipitated after pretreatment at high temperature and long times. The high degree of lignin removal and high glucose release from both feedstocks demonstrate that [DMBA][HSO4] is an excellent ionic liquid for fractionation of very lignin-rich biomass.
AU  - Anuchi,S
AU  - Campbell,K
AU  - Hallett,J
DO  - 10.1038/s41598-022-09629-4
PY  - 2022///
SN  - 2045-2322
TI  - Effective pretreatment of lignin-rich coconut wastes using a low-cost ionic liquid
T2  - Scientific Reports
UR  - http://dx.doi.org/10.1038/s41598-022-09629-4
UR  - http://hdl.handle.net/10044/1/96051
VL  - 12
ER  -
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