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By: Niranjana Arivalagan and Indra Neel Pulidindi.
MBBS Student, Department of Ear, Nose and Throat, Saveetha Medical College (SMC) and Saveetha Institute of Medical and Technical Sciences (SIMATS), Saveetha Nagar, Thandalam 602105, Tamil Nadu, India.
Assistant Professor, Department of Ear, Nose and Throat, Saveetha Medical College (SMC) and SaveethaInstitute of Medical and Technical Sciences (SIMATS), Saveetha Nagar, Thandalam 602105, Tamil Nadu, India.
The new avenue in the realm of catalysis and in chemical industry is the paradigm shift from fossil based to biobased inventory, including the feedstock. Biomass is found to be a promising substitute to petroleum- based feedstock. Almost all the chemicals that could be derived from the conventional petro-refinery can be obtained from the bio-refinery with the intelligent use of Catalysis for the conversion of biomass selectively to the target product in an atom and energy efficient way. Conversion of glucose to 2,5-furandicarboxylic acid is such a challenge to catalyst chemists. There are two key steps involved in the conversion of biomass (cellulose) to 2,5-FDCA. One is to stop the conversion of cellulose at the intermediate stage of the formation of 5-hydroxymethylfurfural avoiding the most feasible product, i.e., the levulinic acid and then converting the key intermediate of the cellulose hydrolysis process via glucose isomerization and dehydration, namely, the 5-HMF to 2,5-FDCA using a potential redox catalyst. Of course, we all know that noble metals (Pt, Pd, Au on carbon or TiO2 or some other inert support) are the best for this purpose. But chemical industry does not have the luxury of using noble metal catalyst for producing 2,5-FDCA. So, the obvious next choice is to go for non-noble metal-based metal oxides. Enormous work is done on this issue and such efforts are highlighted. An insight into the significant progress in the understanding of the catalytic pathways and the reaction mechanisms for the selective conversion of glucose to 2,5-FDCA is provided. Essentially, a fine balance between the basicity (alkalinity) and redox property of the catalyst appears to be the key for the selective conversion of glucose to 2,5-FDCA. Novel catalytic system, like the ammonium salt of molybdophosphoric acid, remains to be explored for the application.
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Citation:
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