Imperial College London
Portrait Picture

Dr Agnieszka Brandt-Talbot

Faculty of Natural Sciences, Department of Chemistry

Lecturer in Chemistry
 
 
 
//

Contact

 

+44 (0)20 7594 1172agi Website

 
 
//

Location

 

401MMolecular Sciences Research HubWhite City Campus

//

Summary

 

Publications

Citation

BibTex format

@article{Bukowski:2020:10.1002/cplu.202000025,
author = {Bukowski, A and Esau, D and Rafat, Said AA and BrandtTalbot, A and Albert, J},
doi = {10.1002/cplu.202000025},
journal = {ChemPlusChem},
pages = {373--386},
title = {Combining costefficient cellulose and shortchain carboxylic acid production: the polyoxometalate (POM)Ionosolv concept},
url = {http://dx.doi.org/10.1002/cplu.202000025},
volume = {85},
year = {2020}
}
Download

RIS format (EndNote, RefMan)

TY  - JOUR
AB  - Full costeffective exploitation of all wood components is key to growing a commercially successful biorefining industry. An innovative process is reported that combines fractionation of lignocellulosic biomass using a lowcost ionic liquid (Ionosolv) and production of bioderived formic acid using polyoxometalates and molecular oxygen (OxFA process). We show that the hemicellulose and part of the lignin were selectively dissolved into the ionic liquid triethylammonium hydrogen sulfate and oxidised in situ to shortchain, distillable carboxylic acids by a Keggintype polyoxometalate with high yields and selectivities. Characterization by several techniques, including ICPOES, FTIR, GC, HPLC and NMR spectroscopy confirmed stability of the catalyst over three consecutive POMIonosolv recycles and stable formic acid yields.High formic acid yields of 26 % (pine chips), 23 % (beech chips), and 18 % (Miscanthus ) were obtained with respect to the initial carbon content of the biomass, with unprecedented oxidation selectivities for formic acid of 54–62 % depending on vanadium substitution in the polyoxometalate, the processing temperature and the water content in the reaction mixture.. We also demonstrate that the cellulose rich pulp is a suitable source of glucose via enzymatic saccharification. We report cellulose yields of 37% for Miscanthus (from originally 48% glucan content), 33% for pine (from originally 49%) and 31% for beech (from originally 41%) were achieved, and a saccharification yield of up to 25% without optimisation. With further optimisation, this concept has the potential to generate two chemical products directly from lignocellulose in high yields and selectivities and hence a novel avenue for full utilisation of cellulose, hemicellulose and lignin.
AU  - Bukowski,A
AU  - Esau,D
AU  - Rafat,Said AA
AU  - BrandtTalbot,A
AU  - Albert,J
DO  - 10.1002/cplu.202000025
EP  - 386
PY  - 2020///
SN  - 2192-6506
SP  - 373
TI  - Combining costefficient cellulose and shortchain carboxylic acid production: the polyoxometalate (POM)Ionosolv concept
T2  - ChemPlusChem
UR  - http://dx.doi.org/10.1002/cplu.202000025
UR  - http://hdl.handle.net/10044/1/79358
VL  - 85
ER  -
Download