@article {46739,
	title = {Advances in solid catalysts for selective hydrogenolysis of glycerol to 1,3-propanediol},
	journal = {Catalysis Reviews-Science and Engineering},
	year = {2021},
	month = {JAN},
	type = {Review},
	abstract = {<p>Glycerol is one of the top 12 platform chemicals obtained from biomass. Its surplus availability as a by-product of biodiesel, fat-splitting and soap manufacturing industries and affordable price lends significant opportunity for its valorization, using solid catalysts, into propanediols (PDOs), particularly to 1,3-propanediol (1,3-PDO), by selective hydrogenolysis. 1,3-PDO is an important chemical with wide applications including that as a precursor in polymers manufacturing. However, the synthesis of 1,3-PDO by selective cleavage of the secondary C-O bond of glycerol in the presence of hydrogen (instead of the primary C-O bond yielding 1,2-PDO) is highly challenging. Of late, supported Pt and Ir catalysts in combination with a reducible oxide (WO(x)or ReOx) were found selective for 1,3-PDO formation. Support, metals composition and additives (co-added metals) affect the performance of these catalysts. Detailed investigations revealed that metal dispersion, electronic connectivity between metal and metal oxide/support, hydrogen activation/spillover and Bronsted acidity are some parameters that influence the activity and selectivity of these bi-functional, metal-metal oxide catalysts. This review summarizes the latest advances in these solid catalysts for selective hydrogenolysis of glycerol to 1,3-PDO, a monomer for advanced polymers.</p>
},
	keywords = {1, 3-Propanediol, bifunctional metal-metal oxide catalyst, biomass valorization, Glycerol, Hydrogenolysis},
	issn = {0161-4940},
	doi = {10.1080/01614940.2020.1794737},
	author = {Bhowmik, Susmita and Darbha, Srinivas}
}
@article {47135,
	title = {Energy and life cycle impact assessment for xylitol production from corncob},
	journal = {Journal of Cleaner Production},
	volume = {278},
	year = {2021},
	month = {JAN },
	pages = {123217},
	type = {Article},
	abstract = {<p>The conversion of biobased feedstocks into energy and value-added chemicals is one main approach to address the current global challenge for waste mitigation through the biorefinery mode. Corncob biomass which is one of the most abundant agricultural residue in India with a high hemicellulose content, can serve as a potential low-cost raw material for food-grade xylitol production. The present study demonstrates a process for xylitol production from corncob biomass with detailed energy and life cycle analysis for viability assessment. The major highlight of the process is the use of microbial fermentation, where biomass-derived D-xylose is converted to xylitol with high selectivity. Overall, 0.502 kg of xylitol crystals could be produced from 3.5 kg of corncob biomass. Simulation analysis revealed that the evaporators are the primary consumers of energy, and the process of heat integration can significantly reduce the energy requirements of the overall process. Environmental impacts of the system evaluated showed emission results of 8.68 kg CO2 equivalent and revealed that marine aquatic and freshwater eco-toxicity are the only possible contributors to the environment. The results suggest that the process would have favourable energy balances, which can be used in pilot plant and heat exchanger network design and operation for xylitol production scale up to 500 L. (C) 2020 Elsevier Ltd. All rights reserved.</p>
},
	keywords = {biomass valorization, Life cycle impact assessment, simulation, xylitol},
	issn = {0959-6526},
	doi = {10.1016/j.jclepro.2020.123217},
	author = {Dasgupta, Diptarka and Sidana, Arushdeep and Ghosh, Prasenjit and Sharma, Tripti and Singh, Jasvinder and Prabhune, Asmita and More, Snehal and Bhaskar, Thallada and Ghosh, Debashish}
}
@article {47753,
	title = {Supported MoOx and WOx solid acids for biomass valorization: interplay of coordination chemistry, acidity, and catalysis},
	journal = {ACS Catalysis},
	volume = {11},
	year = {2021},
	month = {NOV},
	pages = {13603-13648},
	type = {Article},
	abstract = {Supported molybdenum oxide (MoOx) and tungsten oxide (WOx) materials are a vital class of solid acid catalysts for the chemical industry because of their nontoxic nature, strong acidity, remarkable stability in water, hydrogen, and oxygen atmospheres, and excellent reusability performance. These fascinating solid acids play a pivotal role in developing sustainable catalytic routes for renewable biomass processing to produce value-added fuels, chemicals, and platform molecules. The coordination chemistry of MoOx and WOx on the support materials (oxides, carbons, or zeolites) controls their acidic strength, active site accessibility, and catalytic activity. Hence, significant efforts have been made toward optimizing the conditions used for catalyst synthesis and biomass processing to tune the coordination chemistry of MoOx and WOx with the substrate molecules and, thus, their acid-activity/selectivity performance. This Review provides a comprehensive overview of supported MoOx and WOx solid acids for biomass valorization. The importance of the biomass and the role of solid acids for biomass valorization were emphasized, followed by a brief discussion of supported MoOx and WO(x )solid acids. Afterward, the interplay of coordination chemistry, acidic strength, and catalytic activity of supported MoOx and WOx solid acids was discussed. Finally, their catalytic applications for the valorization of several biomass substrates and their derivatives were summarized. This Review will provide valuable insights for developing advanced supported WOx and MoOx solid acids for catalytic biomass valorization and other challenging acid-catalyzed processes.},
	keywords = {Acidity, biomass valorization, catalysis, Coordination chemistry, molybdenum oxide, tungsten oxide},
	issn = {2155-5435},
	doi = {10.1021/acscatal.1c03326},
	author = {Sudarsanam, Putla and Gupta, Navneet Kumar and Mallesham, Baithy and Singh, Nittan and Kalbande, Pavan Narayan and Reddy, Benjaram M. and Sels, Bert F.}
}
