Shreya Tripathi

Bio: Shreya Tripathi is an academic researcher from Indian Institute of Technology Delhi. The author has contributed to research in topics: Hemicellulose & Biorefining. The author has an hindex of 2, co-authored 3 publications receiving 11 citations.

Catalytic conversion of lignocellulosic polysaccharides to commodity biochemicals: a review

Abstract: The applications of green chemistry and industrial bioprocessing are becoming more popular to address concerns of pollution, climate change, global warming, circular bioeconomy, sustainable development goals and energy security. Both biological and thermochemical routes can play vital roles in transforming waste lignocellulosic biomass to high-value bioproducts. Lignocellulosic biomass contains essential building blocks that could be tapped to generate biofuels, biochemicals and biomaterials to replace petroleum-derived fuels and chemicals. Besides containing extractives and ash, lignocellulosic feedstocks are made up of cellulose, hemicellulose and lignin typically in the ranges of 35–55 wt%, 20–40 wt% and 10–25 wt%, respectively. Catalytic thermochemical approaches are effective for biomass conversion with a significant yield of various platform chemicals, such as furfural, 5-hydroxymethylfurfural, levulinic acid and other furan or non-furan-based chemicals. These chemicals play a crucial part in the synthesis of different fuel-based materials, which can successfully replace petroleum-based chemicals or fuels. Lignocellulosic biomass and their derived monomeric sugars can be catalytically converted into various platform chemicals using different homogeneous and heterogeneous catalysts. In this review paper, we have highlighted some promising catalysts such as mineral acids, mesoporous silica materials, zeolites, metal–organic frameworks, metal oxides and ionic liquids used in biorefining to generate biochemicals. We have also reviewed a few pieces of notable literature presenting the catalytic conversion of cellulose, hemicellulose, cellobiose, glucose, fructose and xylose into various high-value chemicals.

Volume tables for azadirachta indica for gujarat region

Abstract: In this article volume tables of Neem based on data collected by felling 25 sample trees from different plantations in Gandhinagar Division of Gujarat State are presented. Different models were tried. Equations having the best fit on the basis of minimum Furnival Index, minimum standard error of estimate and maximum correlation coefficient have been selected for volume calculations.

Volume Tables for Acacia tortilis Plantations Based on Data Collected from KJD Abadi Plantation of Khajuwala Range Chattergarh Division, IGPN Area Rajasthan

Abstract: In this article tables are based on the data collected from Acacia tortilis plantations at KJD Abadi planations of Khajuwala Range, Chattergarh Division of IGNP area. The tables are based on 40 fulled trees. Different models were tried. The equation having the best fit on the basis of minimum Furnival Index have been selected for volume calculations.

Innovations in applications and prospects of bioplastics and biopolymers: a review

Abstract: Non-biodegradable plastics are continually amassing landfills and oceans worldwide while creating severe environmental issues and hazards to animal and human health. Plastic pollution has resulted in the death of millions of seabirds and aquatic animals. The worldwide production of plastics in 2020 has increased by 36% since 2010. This has generated significant interest in bioplastics to supplement global plastic demands. Bioplastics have several advantages over conventional plastics in terms of biodegradability, low carbon footprint, energy efficiency, versatility, unique mechanical and thermal characteristics, and societal acceptance. Bioplastics have huge potential to replace petroleum-based plastics in a wide range of industries from automobiles to biomedical applications. Here we review bioplastic polymers such as polyhydroxyalkanoate, polylactic acid, poly-3-hydroxybutyrate, polyamide 11, and polyhydroxyurethanes; and cellulose-based, starch-based, protein-based and lipid-based biopolymers. We discuss economic benefits, market scenarios, chemistry and applications of bioplastic polymers.