TY - JOUR
T1 - Light-driven transformation of biomass into chemicals using photocatalysts – Vistas and challenges
AU - Rao, Vempuluru Navakoteswara
AU - Malu, Thayil Jayakumari
AU - Krishnan, Cheralathan Kanakkampalayam
AU - Sakar, Mohan
AU - Pitchaimuthu, Sudhagar
AU - Rodríguez-González, Vicente
AU - Kumari, Murikinati Mamatha
AU - Shankar, Muthukonda Venkatakrishnan
N1 - Funding Information:
The author KKC acknowledges seed grant received from VIT, Vellore, India. MVS gratefully acknowledges the financial support from the Ministry of New and Renewable Energy ( MNRE ), New Delhi, India (No. 103/227/2014-NT ). V. N. Rao thanks the Council of Scientific and Industrial Research ( CSIR-SRF ), New Delhi, India for the financial support provided through fellowship ( 09/1076(0005)/2019-EMR-1 ) to carryout Ph.D. research. S.P. thanks the European Regional Development Fund and Welsh Government for support through Ser Cymru-II Rising Star Fellowship. V. R.-G. thanks to National Council of Science and Technology ( CF-2019-101703-CONACyT ), Mexico.
Funding Information:
The author KKC acknowledges seed grant received from VIT, Vellore, India. MVS gratefully acknowledges the financial support from the Ministry of New and Renewable Energy (MNRE), New Delhi, India (No.103/227/2014-NT). V. N. Rao thanks the Council of Scientific and Industrial Research (CSIR-SRF), New Delhi, India for the financial support provided through fellowship (09/1076(0005)/2019-EMR-1) to carryout Ph.D. research. S.P. thanks the European Regional Development Fund and Welsh Government for support through Ser Cymru-II Rising Star Fellowship. V. R.-G. thanks to National Council of Science and Technology (CF-2019-101703-CONACyT), Mexico.
Publisher Copyright:
© 2021 Elsevier Ltd
PY - 2021/4/15
Y1 - 2021/4/15
N2 - Lignocellulosic biomass has become an important sustainable resource for fuels, chemicals and energy. It is an attractive source for alternative fuels and green chemicals because it is non-edible and widely available in the planet in huge volumes. The use of biomass as starting material to produce fuels and chemicals leads to closed carbon cycle and promotes circular economy. Although there are many thermo-chemical methods such as pyrolysis, liquefaction and gasification close at hand for processing lignocellulosic biomass and transforming the derived compounds into valuable chemicals and fuels, the photocatalytic method is more advantageous as it utilizes light and ambient conditions for reforming the said compounds. Appraisal of recent literature indicates a variety of photocatalytic systems involving different catalysts, reactors and conditions studied for this purpose. This article reviews the recent developments on the photocatalytic oxidation of biomass and its derivatives into value-added chemicals. The nature of the biomass and derived molecules, nature of the photocatalysts, efficiency of the photocatalysts in terms of conversion and selectivity, influence of reaction conditions and light sources, effect of additives and mechanistic pathways are discussed. Importance has been given also to discuss the complementary technologies that could be coupled with photocatalysis for better conversion of biomass and biomass-derived molecules to value-added chemicals. A summary of these aspects, conclusions and future prospects are given in the end.
AB - Lignocellulosic biomass has become an important sustainable resource for fuels, chemicals and energy. It is an attractive source for alternative fuels and green chemicals because it is non-edible and widely available in the planet in huge volumes. The use of biomass as starting material to produce fuels and chemicals leads to closed carbon cycle and promotes circular economy. Although there are many thermo-chemical methods such as pyrolysis, liquefaction and gasification close at hand for processing lignocellulosic biomass and transforming the derived compounds into valuable chemicals and fuels, the photocatalytic method is more advantageous as it utilizes light and ambient conditions for reforming the said compounds. Appraisal of recent literature indicates a variety of photocatalytic systems involving different catalysts, reactors and conditions studied for this purpose. This article reviews the recent developments on the photocatalytic oxidation of biomass and its derivatives into value-added chemicals. The nature of the biomass and derived molecules, nature of the photocatalysts, efficiency of the photocatalysts in terms of conversion and selectivity, influence of reaction conditions and light sources, effect of additives and mechanistic pathways are discussed. Importance has been given also to discuss the complementary technologies that could be coupled with photocatalysis for better conversion of biomass and biomass-derived molecules to value-added chemicals. A summary of these aspects, conclusions and future prospects are given in the end.
KW - Added-value chemicals
KW - Alcohols
KW - Biomass
KW - Cellulose
KW - Lignin
KW - Photobiorefinery
KW - Photocatalysis
KW - Sugars
UR - http://www.scopus.com/inward/record.url?scp=85100050055&partnerID=8YFLogxK
U2 - 10.1016/j.jenvman.2021.111983
DO - 10.1016/j.jenvman.2021.111983
M3 - Article
C2 - 33529884
AN - SCOPUS:85100050055
VL - 284
JO - Journal of Environmental Management
JF - Journal of Environmental Management
SN - 0301-4797
M1 - 111983
ER -