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{Kessler:2018:10.1002/cssc.201702060,
author = {Kessler, M and Woodward, RT and Wong, N and Rinaldi, R},
doi = {10.1002/cssc.201702060},
journal = {ChemSusChem},
pages = {552--561},
title = {Kinematic Modeling of Mechanocatalytic Depolymerization of Α-Cellulose and Beechwood},
url = {http://dx.doi.org/10.1002/cssc.201702060},
volume = {11},
year = {2018}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - Mechanocatalytic depolymerization of lignocellulose presents a promising method for the solidstate transformation of acidified raw biomass into watersoluble products (WSPs). However, the mechanisms underlining the utilization of mechanical forces in the depolymerization are poorly understood. A kinematic model of the milling process is applied to assess the energy dose transferred to cellulose during its mechanocatalytic depolymerization under varied conditions (rotational speed, milling time, ball size, and substrate loading). The data set is compared to the apparent energy dose calculated from the kinematic model and reveals key features of the mechanocatalytic process. At low energy doses, a rapid rise in the WSP yield associated with the apparent energy dose is observed. However, at a higher energy dose obtained by extended milling duration or high milling speeds, the formation of a substrate cake layer on the mill vials appear to buffer the mechanical forces, preventing full cellulose conversion into WSPs. By contrast, for beechwood, there exists a good linear dependence between the WSP yield and the energy dose provided to the substrate over the entire range of WSP yields. As the formation of a substrate cake in depolymerization of beechwood is less severe than that for the cellulose experiments, the current results verify the hypothesis regarding the negative effect of a substrate layer formed on the mill vials upon the depolymerization process. Overall, the current findings provide valuable insight into relationships between the energy dose and the extent of cellulose depolymerization effected by the mechanocatalytic process.
AU  - Kessler,M
AU  - Woodward,RT
AU  - Wong,N
AU  - Rinaldi,R
DO  - 10.1002/cssc.201702060
EP  - 561
PY  - 2018///
SN  - 1864-5631
SP  - 552
TI  - Kinematic Modeling of Mechanocatalytic Depolymerization of Α-Cellulose and Beechwood
T2  - ChemSusChem
UR  - http://dx.doi.org/10.1002/cssc.201702060
UR  - http://hdl.handle.net/10044/1/58446
VL  - 11
ER  -
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