Insights into reductive depolymerization of Kraft lignin to produce aromatics in the presence of Pt/HZSM-23 catalyst

Lignin is one of the primary residues obtained after the processing of lignocellulosic biomass. However, most residual lignin is burnt directly to get rid of it, albeit one of the few biorenewable waste resources that can yield aromatics. Therefore, the present study investigates reductive depolymer...

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Autores principales:	Akshay R. Mankar, Ejaz Ahmad, Kamal K. Pant
Formato:	article
Lenguaje:	EN
Publicado:	KeAi Communications Co., Ltd. 2021
Materias:	Kraft lignin Reductive depolymerization Phenols Aromatics Bio-oil Pt/HZSM-23 Materials of engineering and construction. Mechanics of materials TA401-492 Energy conservation TJ163.26-163.5
Acceso en línea:	https://doaj.org/article/1ac568add6294195adffcbebc5ff1c74
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spelling	oai:doaj.org-article:1ac568add6294195adffcbebc5ff1c742021-11-30T04:17:12ZInsights into reductive depolymerization of Kraft lignin to produce aromatics in the presence of Pt/HZSM-23 catalyst2589-299110.1016/j.mset.2021.08.006https://doaj.org/article/1ac568add6294195adffcbebc5ff1c742021-01-01T00:00:00Zhttp://www.sciencedirect.com/science/article/pii/S2589299121000331https://doaj.org/toc/2589-2991Lignin is one of the primary residues obtained after the processing of lignocellulosic biomass. However, most residual lignin is burnt directly to get rid of it, albeit one of the few biorenewable waste resources that can yield aromatics. Therefore, the present study investigates reductive depolymerization of Kraft lignin into aromatics in the presence of Pt/HZSM-23 catalyst. In this regard, the lignin conversion experiments were performed under mild reaction conditions at a temperature range of 100 °C to 200 °C for 1 h to 12 h in a high-pressure batch reactor. Besides, a comparative study was done on the effect of the supply of external hydrogen and in-situ hydrogenation. Eventually, 87.3% lignin conversion was measured yielding 65.1% bio-oil, primarily aromatics at optimized experimental conditions. It was observed that the mesopores in the Pt/HZSM-23 catalyst facilitate the transfer of larger molecules derived from the Kraft lignin, thus causing an overall improvement in the catalytic activity. A mechanistic study based on experimental conditions and products detected using GC-MS revealed that the in-situ hydrogen transfer route is more favorable for lignin depolymerization than externally supplied hydrogen.Akshay R. MankarEjaz AhmadKamal K. PantKeAi Communications Co., Ltd.articleKraft ligninReductive depolymerizationPhenolsAromaticsBio-oilPt/HZSM-23Materials of engineering and construction. Mechanics of materialsTA401-492Energy conservationTJ163.26-163.5ENMaterials Science for Energy Technologies, Vol 4, Iss , Pp 341-348 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Kraft lignin Reductive depolymerization Phenols Aromatics Bio-oil Pt/HZSM-23 Materials of engineering and construction. Mechanics of materials TA401-492 Energy conservation TJ163.26-163.5
spellingShingle	Kraft lignin Reductive depolymerization Phenols Aromatics Bio-oil Pt/HZSM-23 Materials of engineering and construction. Mechanics of materials TA401-492 Energy conservation TJ163.26-163.5 Akshay R. Mankar Ejaz Ahmad Kamal K. Pant Insights into reductive depolymerization of Kraft lignin to produce aromatics in the presence of Pt/HZSM-23 catalyst
description	Lignin is one of the primary residues obtained after the processing of lignocellulosic biomass. However, most residual lignin is burnt directly to get rid of it, albeit one of the few biorenewable waste resources that can yield aromatics. Therefore, the present study investigates reductive depolymerization of Kraft lignin into aromatics in the presence of Pt/HZSM-23 catalyst. In this regard, the lignin conversion experiments were performed under mild reaction conditions at a temperature range of 100 °C to 200 °C for 1 h to 12 h in a high-pressure batch reactor. Besides, a comparative study was done on the effect of the supply of external hydrogen and in-situ hydrogenation. Eventually, 87.3% lignin conversion was measured yielding 65.1% bio-oil, primarily aromatics at optimized experimental conditions. It was observed that the mesopores in the Pt/HZSM-23 catalyst facilitate the transfer of larger molecules derived from the Kraft lignin, thus causing an overall improvement in the catalytic activity. A mechanistic study based on experimental conditions and products detected using GC-MS revealed that the in-situ hydrogen transfer route is more favorable for lignin depolymerization than externally supplied hydrogen.
format	article
author	Akshay R. Mankar Ejaz Ahmad Kamal K. Pant
author_facet	Akshay R. Mankar Ejaz Ahmad Kamal K. Pant
author_sort	Akshay R. Mankar
title	Insights into reductive depolymerization of Kraft lignin to produce aromatics in the presence of Pt/HZSM-23 catalyst
title_short	Insights into reductive depolymerization of Kraft lignin to produce aromatics in the presence of Pt/HZSM-23 catalyst
title_full	Insights into reductive depolymerization of Kraft lignin to produce aromatics in the presence of Pt/HZSM-23 catalyst
title_fullStr	Insights into reductive depolymerization of Kraft lignin to produce aromatics in the presence of Pt/HZSM-23 catalyst
title_full_unstemmed	Insights into reductive depolymerization of Kraft lignin to produce aromatics in the presence of Pt/HZSM-23 catalyst
title_sort	insights into reductive depolymerization of kraft lignin to produce aromatics in the presence of pt/hzsm-23 catalyst
publisher	KeAi Communications Co., Ltd.
publishDate	2021
url	https://doaj.org/article/1ac568add6294195adffcbebc5ff1c74
work_keys_str_mv	AT akshayrmankar insightsintoreductivedepolymerizationofkraftlignintoproducearomaticsinthepresenceofpthzsm23catalyst AT ejazahmad insightsintoreductivedepolymerizationofkraftlignintoproducearomaticsinthepresenceofpthzsm23catalyst AT kamalkpant insightsintoreductivedepolymerizationofkraftlignintoproducearomaticsinthepresenceofpthzsm23catalyst
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Insights into reductive depolymerization of Kraft lignin to produce aromatics in the presence of Pt/HZSM-23 catalyst

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