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2024 | Book

The Lignin Macromolecule

A Compendium of Sustainable Technologies

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About this book

This book covers lignin, a renewable source of carbonaceous material derived from biomass, which is a subject of research, development and innovation in both academia and industry.

From lignin we can obtain chemicals (e.g., aromatics, phenols), materials (e.g., fibres, engineered plastics, modified polymers), specialties (e.g., additives as antioxidant), among other products in diverse levels of technology readiness. However, there are challenges to overcome in terms of chemical structure, industrial yields of conversion processes, and the quality of raw material in order to reach the best uses and applications according to the sustainability vision for products and processes. This book deals with the main biochemical pathways of synthesis; advanced analytical techniques; extraction strategies; chemical, biochemical, biological, and physical processing for chemicals and materials; circularity and sustainability aspects for actual and future production chains, allied to life cycle assessment and industrial ecology.

Table of Contents

Frontmatter
Chapter 1. Introduction to the Lignin Subject
Abstract
Lignin, a macromolecule obtained from lignocellulosic biomass, is a residue or coproduct from industrial sectors as cellulose pulp and paper and second-generation ethanol. It is classified as sulfur containing lignin and sulfur-free lignin, that depends on the extraction process. In this chapter aspects related to an overview of the lignin production, its global availability, market, and products and applications are treated in order to introduce the relevance of lignin as an industrial renewable macromolecule with several usages.
Silvio Vaz Jr.
Chapter 2. The Biochemical Pathways in Plants
Abstract
As the most abundant plant biomass when compared to the other classes, lignocellulosic biomass is formed by cellulose, hemicellulose, and lignin, which are the three components of the cell wall and the morphological structure of plants, been lignin a phenolic macromolecule. This chapter describes the physicochemical considerations of the lignin macromolecule, the metabolic pathways related to its biosynthesis, and differences between hardwoods and softwoods in order to understand the biochemistry aspects behind the natural production of lignin.
Silvio Vaz Jr.
Chapter 3. Advanced Analytical Techniques for Lignin
Abstract
The understanding of the physicochemical properties and the chemical composition of the lignin macromolecule is of fundamental importance for its technological usage. However, it will depend on the application of a large set of analytical techniques for these purposes. This chapter treats about the description of the most used advanced analytical chemistry, a critical application of these analytical techniques for Kraft lignin as a case study, and new analytical approaches in order to generate analytical information for the macromolecule usages.
Silvio Vaz Jr.
Chapter 4. Extraction Processes
Abstract
For laboratory study and industrial exploration of lignin as a carbonaceous raw material or an end-product, it is desirable a high-purity with absence of impurities, which is not so easy to reach, mainly in the industry. Furthermore, it is of great interest to preserve the original chemical structure and conformation, which is even more difficult. This chapter discuss the main extraction processes to obtain lignin-types native, Kraft, Organosolv, soda and Klason, and recent advances as LignoBoost and LignoForce. Additionally, Kraft and Organosolv processes are evaluated according to green chemistry principles. And the LignoBoost process is presented as a case study.
Silvio Vaz Jr.
Chapter 5. Chemical Processing and Their Products
Abstract
Conversion processes generally related to chemocatalysis, molecular deconstruction or depolymerization, thermochemistry, and structural modifications can boost the development of high-value products from lignin. In this chapter, these classes of chemical conversion processes will be treated in order to explore all possibilities to achieve several organic chemicals. A case study base on lignin cracking is also presented. And the evaluation of advantages and disadvantages according the green chemistry principles is considered.
Silvio Vaz Jr.
Chapter 6. Biochemical and Biological Processing and Their Products
Abstract
Enzymes and microbe agents (i.e., yeasts, fungi, and bacteria), followed by posterior biosynthesis of bioproducts, are the basis for the biochemical processing of lignin according to industrial biotechnology. It is worth to consider that the main purpose of bioprocesses is to replace raw materials and products of fossil origin by their renewable counterparts derived from biomass and their constituents. Thus, this chapter treats about enzymatic catalysis and microbes application to produce several organic chemicals. Furthermore, the vanillin production by fungi and the green chemistry principles application are also explored.
Silvio Vaz Jr.
Chapter 7. Chemical and Physical Processing for Materials and Their Products
Abstract
Carbon-based materials obtained from lignins are a subject to be explored in order to create new high-value products for pulp and paper and biofuel industries. New products as battery components, polymeric materials, additive for pellets, and carbon fiber are presented and discussed in this chapter in order to demonstrate the technological opportunities for these lignin-based materials. Furthermore, a case study will provide the potential of carbon fibers, and the evaluation of advantages and disadvantages according green chemistry principles.
Silvio Vaz Jr.
Chapter 8. Aspects of Circularity and Sustainability to be Addressed for the Lignin Uses
Abstract
Circularity and sustainability are concepts to be strategically incorporated to the lignin processing and end-use in order to confer environmental, social, and economic gains. In this chapter these concepts are explored, allied to bioeconomy, life cycle assessment, and industrial ecology in order to promote sustainable technologies. Additionally, know the biobased content is paramount to guarantee the origin and the sustainability of products and processes assisted by the E-factor. Furthermore, the decarbonization promoted by the lignin-based carbon fibers are discussed as a case study.
Silvio Vaz Jr.
9. Correction to: Advanced Analytical Techniques for Lignin
Silvio Vaz Jr.
Metadata
Title
The Lignin Macromolecule
Author
Silvio Vaz Jr.
Copyright Year
2024
Electronic ISBN
978-3-031-75511-8
Print ISBN
978-3-031-75510-1
DOI
https://doi.org/10.1007/978-3-031-75511-8

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