Imperial College London
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Dr Roberto Rinaldi FRSC

Faculty of Engineering, Department of Chemical Engineering

Reader in Applied Chemistry
 
 
 
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Contact

 

+44 (0)20 7594 1302r.rinaldi1 Website

 
 
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Location

 

523ACE ExtensionSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Rinaldi:2019:10.21577/0103-5053.20180231,
author = {Rinaldi, R and Woodward, RT and Ferrini, P and Rivera, HJE},
doi = {10.21577/0103-5053.20180231},
journal = {Journal of the Brazilian Chemical Society},
pages = {479--491},
title = {Lignin-first biorefining of lignocellulose: the impact of process severity on the uniformity of lignin oil composition},
url = {http://dx.doi.org/10.21577/0103-5053.20180231},
volume = {30},
year = {2019}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - In lignin-first biorefining via reductive processes, lignocellulosic materials are deconstructed by the solvent extraction of lignin in the presence of a hydrogenation catalyst. This approach provides a route to the successful extraction and reductive passivation of lignin fragments to produce low molar mass lignin oils together with high-quality pulps. Herein, we present an investigation into the impact of process severity (i.e., cooking temperature) on the reductive processes taking place on the lignin fragments and uniformity of the product mixture. In addition to improving overall delignification yields (up to 87%) and producing low molar mass fragments, higher process temperatures led to the  preferential  cleavage  of  hydroxyl  groups  in  monolignol  sidechains  via  hydrodeoxygenation,  yielding oils with lower oxygen content. By comparing products from both lignin-first biorefining and organosolv processes at various temperatures, we elucidate key performance differences and outline routes to increased chemical uniformity in lignin streams. Overall, this study outlines clearly the importance of process temperature in the deconstruction of lignocellulose by lignin-first biorefining when producing highly depolymerized lignin products. This study points out a trade-off in the effect of temperature upon delignification and increase in product mixture complexity, which needs to be carefully optimized for the scale-up of lignin-first technologies.
AU  - Rinaldi,R
AU  - Woodward,RT
AU  - Ferrini,P
AU  - Rivera,HJE
DO  - 10.21577/0103-5053.20180231
EP  - 491
PY  - 2019///
SN  - 0103-5053
SP  - 479
TI  - Lignin-first biorefining of lignocellulose: the impact of process severity on the uniformity of lignin oil composition
T2  - Journal of the Brazilian Chemical Society
UR  - http://dx.doi.org/10.21577/0103-5053.20180231
UR  - http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000457461000007&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=1ba7043ffcc86c417c072aa74d649202
UR  - http://hdl.handle.net/10044/1/69115
VL  - 30
ER  -
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