Depolymerization of cellulosic biomass catalyzed by activated carbons

Hirokazu Kobayashi, Mizuho Yabushita, Atsushi Fukuoka

Research output: Chapter in Book/Report/Conference proceedingChapter

1 Citation (Scopus)

Abstract

Efficient hydrolysis of cellulosic biomass to glucose is a grand challenge for the realization of a nonfood biorefinery. In recent years, solid catalysts have attracted significant attention for biomass conversion, as they can be separated from product solutions and their functions can be designed. In this chapter, we describe activated carbons that can hydrolyze cellulose and real biomass to glucose in yields up to 88 % in the presence of a trace amount of hydrochloric acid. Creating contacts between the solid catalyst and the solid substrate by ball-milling is the key to realizing the potential of this catalytic system. Activated carbon adsorbs cellulosic molecules by van der Waals forces, CH-Π hydrogen bonds, and hydrophobic interactions between the polyaromatic surface of the carbon and the axial planes of glucans, namely, hydrophobic groups. Subsequently, the weakly acidic groups of the carbon surface such as carboxylic acids cleave the glycosidic bonds of cellulose via oxocarbenium intermediates, for which the salicylic acid structure is especially effective.

Original languageEnglish
Title of host publicationReaction Pathways and Mechanisms in Thermocatalytic Biomass Conversion I
Subtitle of host publicationCellulose Structure, Depolymerization and Conversion by Heterogeneous Catalysts
PublisherSpringer Singapore
Pages15-26
Number of pages12
ISBN (Electronic)9789812876881
ISBN (Print)9789812876874
DOIs
Publication statusPublished - 2015 Sep 25
Externally publishedYes

Keywords

  • Activated carbon
  • Ball-milling
  • Cellulose
  • Depolymerization
  • Hydrolysis

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)
  • Energy(all)
  • Biochemistry, Genetics and Molecular Biology(all)
  • Environmental Science(all)

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