scholarly journals Development of ‘Lignin-First’ Approaches for the Valorization of Lignocellulosic Biomass

Molecules ◽  
2020 ◽  
Vol 25 (12) ◽  
pp. 2815 ◽  
Author(s):  
Tamás I. Korányi ◽  
Bálint Fridrich ◽  
Antonio Pineda ◽  
Katalin Barta
Keyword(s):  
Lignocellulosic Biomass ◽  
Structural Modification ◽  
Complex Structure ◽  
Value Added ◽  
Original Structure ◽  
Reaction Conditions ◽  
The Past ◽  
Pulp Paper ◽  
New Strategy ◽  
Value Added Products

Currently, valorization of lignocellulosic biomass almost exclusively focuses on the production of pulp, paper, and bioethanol from its holocellulose constituent, while the remaining lignin part that comprises the highest carbon content, is burned and treated as waste. Lignin has a complex structure built up from propylphenolic subunits; therefore, its valorization to value-added products (aromatics, phenolics, biogasoline, etc.) is highly desirable. However, during the pulping processes, the original structure of native lignin changes to technical lignin. Due to this extensive structural modification, involving the cleavage of the β-O-4 moieties and the formation of recalcitrant C-C bonds, its catalytic depolymerization requires harsh reaction conditions. In order to apply mild conditions and to gain fewer and uniform products, a new strategy has emerged in the past few years, named ‘lignin-first’ or ‘reductive catalytic fractionation’ (RCF). This signifies lignin disassembly prior to carbohydrate valorization. The aim of the present work is to follow historically, year-by-year, the development of ‘lignin-first’ approach. A compact summary of reached achievements, future perspectives and remaining challenges is also given at the end of the review.

Whey Utilization: Sustainable Uses and Environmental Approach

2021 ◽  
Vol 59 (2) ◽  
Author(s):  
Elizabeta Zandona ◽  
Marijana Blažić ◽  
Anet Režek Jambrak
Keyword(s):  
Whey Proteins ◽  
Organic Matter Content ◽  
Value Added ◽  
Edible Films ◽  
Matter Content ◽  
Raw Material ◽  
Sustainable Utilization ◽  
The Past ◽  
Food Applications ◽  
Value Added Products

The dairy industry produces large amounts of whey as a by- product or co-product, which has led to considerable environmental problems due to its high organic matter content. Over the past decades, possibilities of more environmentally and economically efficient whey utilisation have been studied, primarily to convert unwanted end products into a valuable raw material. Sustainable whey management is mostly oriented to biotechnological and food applications for the development of value-added products such as whey powders, whey proteins, functional food and beverages, edible films and coatings, lactic acid and other biochemicals, bioplastic, biofuels and similar valuable bioproducts. This paper provides an overview of the sustainable utilization of whey and its constituents, considering new refining approaches and integrated processes to covert whey, or lactose and whey proteins to high value-added whey-based products.

scholarly journals New Generation Urban Biorefinery toward Complete Utilization of Waste Derived Lignocellulosic Biomass for Biofuels and Value-Added Products

2019 ◽  
Vol 158 ◽  
pp. 918-925 ◽  
Author(s):  
Chengyu Dong ◽  
Ying Wang ◽  
Huaimin Wang ◽  
Carol Sze Ki Lin ◽  
Hsien-Yi Hsu ◽  
...  
Keyword(s):  
Lignocellulosic Biomass ◽  
Value Added ◽  
Complete Utilization ◽  
New Generation ◽  
Value Added Products

Catalytic Sulfone Upgrading Reaction with Alcohols via Ru(II)

2019 ◽  
Author(s):  
Tomas Vojkovsky ◽  
Shubham Deolka ◽  
Saiyyna P. Stepanova ◽  
Michael C. Roy ◽  
Eugene Khaskin
Keyword(s):  
Functional Groups ◽  
Secondary Alcohol ◽  
Value Added ◽  
Catalytic Dehydrogenation ◽  
Reaction Conditions ◽  
Stoichiometric Amount ◽  
Reaction Proceeds ◽  
One Step ◽  
Value Added Products

<a>Sulfones and sulfonamides with an α-CH bond can be easily alkylated by aliphatic alcohols to add the carbon skeleton of the alcohol via a one-step, Ru(II) catalyzed redox neutral reaction. The reaction requires a sub-stoichiometric amount of base and produces only water as a byproduct. A number of pharmaceutically relevant functional groups such as piperidine, morpholine, etc. are well tolerated under the reaction conditions to give higher value-added products in one step from widely available substrates. The reaction proceeds through a sulfone carbanion addition to an in-situ generated aldehyde formed via catalytic dehydrogenation and subsequent catalyst mediated replacement of the secondary alcohol by hydrogen.</a>

Valorisation of lignocellulosic biomass to value-added products: Paving the pathway towards low-carbon footprint

Fuel ◽  
2021 ◽  
pp. 122678
Author(s):  
G. Velvizhi ◽  
Chandamita Goswami ◽  
Nagaraj P. Shetti ◽  
Ejaz Ahmad ◽  
Kamal Kishore Pant ◽  
...  
Keyword(s):  
Lignocellulosic Biomass ◽  
Carbon Footprint ◽  
Value Added ◽  
Low Carbon ◽  
Value Added Products

scholarly journals Agricultural and Forest Residues towards Renewable Chemicals and Materials Using Microwave Liquefaction

2019 ◽  
Vol 2019 ◽  
pp. 1-16 ◽  
Author(s):  
Huijuan Shao ◽  
Hongli Zhao ◽  
Jiulong Xie ◽  
Jinqiu Qi ◽  
Todd F. Shupe
Keyword(s):  
Lignocellulosic Biomass ◽  
Raw Materials ◽  
Value Added ◽  
Polyurethane Foams ◽  
Environmental Benefits ◽  
Forest Residues ◽  
Phenolic Resins ◽  
Renewable Raw Materials ◽  
Renewable Chemicals ◽  
Value Added Products

Microwave-assisted liquefaction is regarded as a promising thermochemical approach to produce renewable and sustainable chemicals and materials from lignocellulosic biomass. Agricultural and forest residues as sources of lignocellulosic biomass have great potential in this regard. With process optimizations, several biomass types have been subjected to liquefaction in different solvents with various catalysts. The products from recent microwave liquefaction with and without further fractionation have been thoroughly analyzed and used for the synthesis of biomaterials. Renewable chemicals, polyurethane foams with partial use of renewable raw materials, and phenolic resins have been the main products from microwave-liquefied products. Further research on microwave liquefaction mechanisms and scalable production should be enhanced to fully evaluate the economic and environmental benefits. This work presents an overview on achievements using liquefaction in combination with microwave energy to convert lignocellulosic biomass into value-added products and chemicals.

scholarly journals Economic Forces Influencing Value-Added Food Industries: Implications for Southern Agriculture

1989 ◽  
Vol 21 (1) ◽  
pp. 13-22 ◽  
Author(s):  
Ralph D. Christy ◽  
John M. Connor
Keyword(s):  
Labor Force ◽  
Value Added ◽  
Economic Activities ◽  
Food Industries ◽  
The Past ◽  
Important Link ◽  
Economic Forces ◽  
Production Agriculture ◽  
Value Added Products

During the past few decades, U. S. agriculture has experienced remarkable gains in productivity and efficiency. While the number of farms has declined, the economic activities supporting production agriculture continue to comprise a major sector of the U. S. economy. The value-added food and fiber complex serves as an important link between production agriculture and the larger U. S. economy. Value-added products from agriculture have a retail value of more than $700 billion annually and engage about 20 percent of the U. S. labor force (ESCOP).

scholarly journals Biorefinery of lignocellulosic biopolymers

2016 ◽  
Vol 2 (1) ◽  
pp. 79 ◽  
Author(s):  
Bruna Steil Boneberg ◽  
Grazielle Dias Machado ◽  
Davi Friedrich Santos ◽  
Fernando Gomes ◽  
Douglas José Faria ◽  
...  
Keyword(s):  
Physicochemical Properties ◽  
Lignocellulosic Biomass ◽  
Value Added ◽  
Renewable Sources ◽  
Renewable Source ◽  
Different Types ◽  
Historic Background ◽  
Made In ◽  
Value Added Products

Lignocellulosic biomass has been widely investigated as a natural renewable source of feedstocks to produce high value added products which can replace energy and materials obtained from non-renewable sources. Polymers are products largely employed in industry in many different applications, which nowadays are mostly produced from petrochemical derivatives, generating huge amounts of waste of difficult treatment prior to disposal. In order to replace these polymers derived from petroleum, efforts have been made in the development of biopolymers, in the biorefinery context, derived from biomass possessing physicochemical properties similar to those derived from petroleum so that they can successfully replace these materials. A review on the different types of biopolymers obtained from biomass, as polysaccharides, lipids, proteins, polyesters produced by plants and microorganisms, and other assorted biopolymers is accomplished. An evaluation of physicochemical properties and applications of different types of biopolymers is approached. It is also discussed about the degradability of biopolymers differentiating oxo-degradability and biodegradability. A brief historic background about biopolymers is also exposed.

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