Selective depolymerization of industrial lignin-containing stillage obtained from cellulosic bioethanol processing

Beatriz Gomez-Monedero, M. Pilar Ruiz, Fernando Bimbela, Jimmy Faria (Corresponding Author)

Research output: Contribution to journalArticleAcademicpeer-review

1 Citation (Scopus)

Abstract

Reductive depolymerization of lignin-containing stillage (LA lignin) from 2nd generation bioethanol industrial plants have been studied over two different families of catalysts: conventional porous Ru catalysts supported on ZrO2 or activated carbon, and 1-dimensional Ru catalysts supported on multi-walled carbon nanotubes (MWCNT). The lignin depolymerization degree using conventional porous catalysts resulted in values of 42 and 53%, for Ru/ZrO2 and Ru/C, respectively. Strikingly, when using 1D-supported catalysts (Ru/MWCNT and Ru/ZrO2/MWCNT), the extent of lignin depolymerization measured by 1H13C HSQC NMR, reached values of c.a. 80% of β-O-4 bond disappearance and a reduction of the average molecular weight from 3600 Da to ~ 1900 Da. The higher accessibility of the lignin agglomerates to the 1-D catalyst nanoparticles substantially improves the lignin depolymerization degree, which make this approach of great interest in the production of fine chemicals and fuel additives.
Original languageEnglish
Pages (from-to)165-172
Number of pages8
JournalFuel processing technology
Volume173
DOIs
Publication statusPublished - 1 May 2018
Externally publishedYes

Keywords

  • Lignin
  • Hydrogenolysis
  • Stillage
  • Carbon nanotubes
  • Depolymerization
  • 1-D catalyst

Cite this

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title = "Selective depolymerization of industrial lignin-containing stillage obtained from cellulosic bioethanol processing",
abstract = "Reductive depolymerization of lignin-containing stillage (LA lignin) from 2nd generation bioethanol industrial plants have been studied over two different families of catalysts: conventional porous Ru catalysts supported on ZrO2 or activated carbon, and 1-dimensional Ru catalysts supported on multi-walled carbon nanotubes (MWCNT). The lignin depolymerization degree using conventional porous catalysts resulted in values of 42 and 53{\%}, for Ru/ZrO2 and Ru/C, respectively. Strikingly, when using 1D-supported catalysts (Ru/MWCNT and Ru/ZrO2/MWCNT), the extent of lignin depolymerization measured by 1H13C HSQC NMR, reached values of c.a. 80{\%} of β-O-4 bond disappearance and a reduction of the average molecular weight from 3600 Da to ~ 1900 Da. The higher accessibility of the lignin agglomerates to the 1-D catalyst nanoparticles substantially improves the lignin depolymerization degree, which make this approach of great interest in the production of fine chemicals and fuel additives.",
keywords = "Lignin, Hydrogenolysis, Stillage, Carbon nanotubes, Depolymerization, 1-D catalyst",
author = "Beatriz Gomez-Monedero and {Pilar Ruiz}, M. and Fernando Bimbela and Jimmy Faria",
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Selective depolymerization of industrial lignin-containing stillage obtained from cellulosic bioethanol processing. / Gomez-Monedero, Beatriz; Pilar Ruiz, M.; Bimbela, Fernando; Faria, Jimmy (Corresponding Author).

In: Fuel processing technology, Vol. 173, 01.05.2018, p. 165-172.

Research output: Contribution to journalArticleAcademicpeer-review

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AU - Gomez-Monedero, Beatriz

AU - Pilar Ruiz, M.

AU - Bimbela, Fernando

AU - Faria, Jimmy

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N2 - Reductive depolymerization of lignin-containing stillage (LA lignin) from 2nd generation bioethanol industrial plants have been studied over two different families of catalysts: conventional porous Ru catalysts supported on ZrO2 or activated carbon, and 1-dimensional Ru catalysts supported on multi-walled carbon nanotubes (MWCNT). The lignin depolymerization degree using conventional porous catalysts resulted in values of 42 and 53%, for Ru/ZrO2 and Ru/C, respectively. Strikingly, when using 1D-supported catalysts (Ru/MWCNT and Ru/ZrO2/MWCNT), the extent of lignin depolymerization measured by 1H13C HSQC NMR, reached values of c.a. 80% of β-O-4 bond disappearance and a reduction of the average molecular weight from 3600 Da to ~ 1900 Da. The higher accessibility of the lignin agglomerates to the 1-D catalyst nanoparticles substantially improves the lignin depolymerization degree, which make this approach of great interest in the production of fine chemicals and fuel additives.

AB - Reductive depolymerization of lignin-containing stillage (LA lignin) from 2nd generation bioethanol industrial plants have been studied over two different families of catalysts: conventional porous Ru catalysts supported on ZrO2 or activated carbon, and 1-dimensional Ru catalysts supported on multi-walled carbon nanotubes (MWCNT). The lignin depolymerization degree using conventional porous catalysts resulted in values of 42 and 53%, for Ru/ZrO2 and Ru/C, respectively. Strikingly, when using 1D-supported catalysts (Ru/MWCNT and Ru/ZrO2/MWCNT), the extent of lignin depolymerization measured by 1H13C HSQC NMR, reached values of c.a. 80% of β-O-4 bond disappearance and a reduction of the average molecular weight from 3600 Da to ~ 1900 Da. The higher accessibility of the lignin agglomerates to the 1-D catalyst nanoparticles substantially improves the lignin depolymerization degree, which make this approach of great interest in the production of fine chemicals and fuel additives.

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