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Characterization of lignin at pre-pyrolysis temperature to investigate its melting problem
KTH Royal Institute of Technology, Sweden.
KTH Royal Institute of Technology, Sweden.
KTH Royal Institute of Technology, Sweden ; Nippon Paper Industries Co., Japan.
KTH Royal Institute of Technology, Sweden.
Vise andre og tillknytning
2019 (engelsk)Inngår i: Fuel, ISSN 0016-2361, E-ISSN 1873-7153, Vol. 235, s. 1061-1069Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

Technical lignin particles melt under relatively low temperature. This results in the problem in the continuous feeding and fluidization during lignin pyrolysis, which in turn limits its utilization on a large scale. In this study, two most available types of lignin have been used to investigate the lignin melting problem, which are Kraft lignin (KL) from pulping process and hydrolysis lignin (HL) from bio-ethanol production process. Elemental composition, thermal property and thermally decomposed derivatives of each sample are tested by elemental analyzer, TGA, DSC, and Py-GC/MS. Morphology, structure and crystal change before and after heat treatment are tested by microscopy, FTIR and XRD. All results suggest that lignin structure determines its melting properties. Kraft lignin from pulping process contains a less cross-linked structure. It melts under heating. On the other hand, hydrolysis lignin from hydrolysis process contains a highly crossed-linked and condensed structure. It does not melt before decomposition under heat treatment. Modifying lignin structure is suggested for the resolution of technical lignin melting problem.

sted, utgiver, år, opplag, sider
2019. Vol. 235, s. 1061-1069
Emneord [en]
Hydrolysis lignin (HL), Kraft lignin (KL), Melting properties, Structure
HSV kategori
Identifikatorer
URN: urn:nbn:se:ri:diva-35219DOI: 10.1016/j.fuel.2018.08.120Scopus ID: 2-s2.0-85052512069OAI: oai:DiVA.org:ri-35219DiVA, id: diva2:1254799
Tilgjengelig fra: 2018-10-10 Laget: 2018-10-10 Sist oppdatert: 2018-10-10bibliografisk kontrollert

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