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Argyropoulos DDS, Crestini C, Dahlstrand C, Furusjö E, Gioia C, Jedvert K, Henriksson G, Hulteberg C, Lawoko M, Pierrou C, Samec JSM, Subbotina E, Wallmo H, Wimby M. Kraft Lignin: A Valuable, Sustainable Resource, Opportunities and Challenges. CHEMSUSCHEM 2023:e202300492. [PMID: 37493340 DOI: 10.1002/cssc.202300492] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/06/2023] [Revised: 07/24/2023] [Accepted: 07/25/2023] [Indexed: 07/27/2023]
Abstract
Kraft lignin, a by-product from the production of pulp, is currently incinerated in the recovery boiler during the chemical recovery cycle, generating valuable bioenergy and recycling inorganic chemicals to the pulping process operation. Removing lignin from the black liquor or its gasification lowers the recovery boiler load enabling increased pulp production. During the past ten years, lignin separation technologies have emerged and the interest of the research community to valorize this underutilized resource has been invigorated. The aim of this Review is to give (1) a dedicated overview of the kraft process with a focus on the lignin, (2) an overview of applications that are being developed, and (3) a techno-economic and life cycle asseeements of value chains from black liquor to different products. Overall, it is anticipated that this effort will inspire further work for developing and using kraft lignin as a commodity raw material for new applications undeniably promoting pivotal global sustainability concerns.
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Affiliation(s)
- Dimitris D S Argyropoulos
- Departments of Chemistry and Forest Biomaterials, North Carolina State University, 431 Dan Allen Drive, Raleigh, North Carolina, 27695, USA
| | - Claudia Crestini
- Department of Molecular Sciences and Nanosystems, Ca' Foscari University of Venice, Via Torino 155, 30170, Venezia-Mestre, Italy
| | | | - Erik Furusjö
- Division of Bioeconomy and Health, RISE Research Institutes of Sweden, Lindholmspiren 7 A, SE-41756, Göteborg, Sweden
- Division of Energy Science, Luleå University of Technology, Universitetsområdet Porsön, SE-971 87, Luleå, Sweden
| | - Claudio Gioia
- Department of physics, University of Trento, Via Sommarive 14, 38123, Trento, Italy
| | - Kerstin Jedvert
- Division of Materials and Production, RISE Research Institutes of Sweden, Lindholmspiren 7 A, SE-41756, Göteborg, Sweden
| | - Gunnar Henriksson
- Wallenberg Wood Science Center (WWSC), KTH, Royal Institute of Technology, 100 44, Stockholm, Sweden
| | - Christian Hulteberg
- Department of Chemical Engineering, Faculty of Engineering, Lund University, 221 00, Lund, Sweden
| | - Martin Lawoko
- Wallenberg Wood Science Center (WWSC), KTH, Royal Institute of Technology, 100 44, Stockholm, Sweden
| | - Clara Pierrou
- RenFuel Materials AB, Rapsgatan 25, SE-754 50, Uppsala, Sweden
| | - Joseph S M Samec
- Ren Fuel K2B AB, Rapsgatan 25, SE-754 50, Uppsala, Sweden
- RenFuel Materials AB, Rapsgatan 25, SE-754 50, Uppsala, Sweden
- Department of Organic Chemistry, Stockholm University, Svante Arhenius väg 16 C, 10691, Stockholm, Sweden
- Department of Chemistry, Faculty of Science, Chulalongkorn University, Pathumwan, 10330, Bangkok, Thailand
| | - Elena Subbotina
- Center for Green Chemistry and Green Engineering, Yale University, 370 Prospect St, New Haven, CT 06511, USA
| | | | - Martin Wimby
- Valmet AB, Regnbågsgatan 6, 41755, Göteborg, Sweden
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Kumar A, Jindal M, Rawat S, Kumar J, Sripadi P, Yang B, Thallada B. Upgradation of sugarcane bagasse lignin: Fractionation to cyclic alcohols production. Catal Today 2022. [DOI: 10.1016/j.cattod.2022.05.037] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
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Lu X, Gu X. Fabrication of a bi-hydroxyl-bi-DOPO compound with excellent quenching and charring capacities for lignin-based epoxy resin. Int J Biol Macromol 2022; 205:539-552. [PMID: 35217079 DOI: 10.1016/j.ijbiomac.2022.02.103] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/25/2021] [Revised: 02/01/2022] [Accepted: 02/16/2022] [Indexed: 11/27/2022]
Abstract
In this study, lignin-based epoxy resins (EP) were fabricated using lignin, phenol and glyoxal as crosslinking reagents. For improving the flame retardancy, a bi-DOPO compound with bi-hydroxyl structure was successfully synthesized, containing excellent quenching and charring capacities. Good pyrolysis behaviors of as-synthesized flame retardant resulted in significant quenching effect via structure decomposition to release PO and PO2 free radicals for capturing reactive H and OH radicals produced from epoxy combustion. With addition of 0.18 wt% phosphorus, epoxy composite (10% LPG-ER-4) passed V-0 rating with high limited oxygen index (LOI) value of 35.2%. Cone calorimeter tests showed that heat release (including heat release rate (HRR) and total heat release (THR)) from combustion was reduced with assistance of flame retardant. Char residue analyses illustrated that bi-hydroxyl structure in DOPO-based flame retardant benefited the formation of char layer with higher compactness and integrity to serve as a protective shell of interior epoxy matrix. Furthermore, exterior pore size of char residue was narrowed or blocked to avoid the release of heat and volatiles generated from combustion. This study provided a feasible method to improve flame retardancy of lignin-based EP and proposed flame-retardant mechanism both in gaseous and solid phases.
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Affiliation(s)
- Xinyu Lu
- Co-Innovation Center for Efficient Processing and Utilization of Forest Products, College of Chemical Engineering, Nanjing Forestry University, 159 Longpan Road, Nanjing 210037, PR China
| | - Xiaoli Gu
- Co-Innovation Center for Efficient Processing and Utilization of Forest Products, College of Chemical Engineering, Nanjing Forestry University, 159 Longpan Road, Nanjing 210037, PR China.
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