Jump to main content
Jump to site search

Issue 32, 2011
Previous Article Next Article

Selective sequestration of carboxylic acids from biomass fermentation by surface-functionalized mesoporous silica nanoparticles

Author affiliations

Abstract

Carboxylic acids produced by acid fermentation have attracted much attention recently as promising chemical feedstock. The feasibility of the acid fermentation as a high-value added bioconversion process depends on the selective separation of carboxylic acids from the bulk solution. The authors synthesized an aminopropyl-functionalized mesoporous silica nanoparticle (MSN) material with the MCM-41 type, parallel channel porous structure via a co-condensation method. The adsorption isotherms were analyzed with an extended Langmuir model using an overloading term. The highest acid adsorption capacity was 3.38 mol kg−1 for 1 : 1 complexation at an amine density of 3.14 mol N kg−1. Positive isosteric heat showed the reaction was exothermic and favored at low temperature. Desorption/regeneration by increasing the pH to 10.5 was completed within 1 min, and the regenerated MSN showed an adsorption capacity equivalent to the original. MSN had a high selectivity for carboxylic acid over ethanol, glucose, and protein. The pseudo-second-order rate constant for acetic acid adsorption on MSN was 0.41 kg mol−1 min, significantly higher than those of an anion exchange resin (0.14 kg mol−1 min) and activated carbon (0.06 kg mol−1 min). We envision that the MSN material could serve as an efficient adsorbent for selective sequestration of biomass-derived carboxylic acids for various applications.

Graphical abstract: Selective sequestration of carboxylic acids from biomass fermentation by surface-functionalized mesoporous silica nanoparticles

Back to tab navigation
Please wait while Download options loads

Supplementary files

Publication details

The article was received on 26 Mar 2011, accepted on 26 May 2011 and first published on 11 Jul 2011


Article type: Paper
DOI: 10.1039/C1JM11299F
Citation: J. Mater. Chem., 2011,21, 12103-12109
  •   Request permissions

    Selective sequestration of carboxylic acids from biomass fermentation by surface-functionalized mesoporous silica nanoparticles

    S. Kim, Y. Huang, C. Sawatdeenarunat, S. Sung and V. S.-Y. Lin, J. Mater. Chem., 2011, 21, 12103
    DOI: 10.1039/C1JM11299F

Search articles by author