Preprint Article Version 1 This version is not peer-reviewed

Critical Point Drying: An Effective Tool for Direct Measurement of the Surface Area of Pretreated Cellulosic Biomass

Version 1 : Received: 24 May 2018 / Approved: 25 May 2018 / Online: 25 May 2018 (11:57:19 CEST)

A peer-reviewed article of this Preprint also exists.

Kang, K.-Y.; Hwang, K.-R.; Park, J.-Y.; Lee, J.-P.; Kim, J.-S.; Lee, J.-S. Critical Point Drying: An Effective Drying Method for Direct Measurement of the Surface Area of a Pretreated Cellulosic Biomass. Polymers 2018, 10, 676. Kang, K.-Y.; Hwang, K.-R.; Park, J.-Y.; Lee, J.-P.; Kim, J.-S.; Lee, J.-S. Critical Point Drying: An Effective Drying Method for Direct Measurement of the Surface Area of a Pretreated Cellulosic Biomass. Polymers 2018, 10, 676.

Journal reference: Polymers 2018, 10, 676
DOI: 10.3390/polym10060676

Abstract

Surface area and pore size distribution of Eucalyptus samples pretreated by different methods were determined by the Brunauer-Emmett-Teller (BET) technique. Three methods were applied to prepare cellulosic biomass samples for BET measurements: air, freeze, and critical point drying (CPD). Air and freeze drying caused severe collapse of biomass pore structures, but CPD effectively preserved biomass morphology. Surface area of CPD prepared Eucalyptus samples was determined to be 58–161 m2/g, whereas air and freeze dried samples were 0.5–1.3 and 1.0–2.4 m2/g, respectively. Average pore diameter of CPD prepared Eucalyptus samples were 61–70Å. CPD preserved Eucalyptus sample morphology by replacing water with a non-polar solvent, CO2 fluid, which prevented hydrogen bond reformation in the cellulose.

Subject Areas

pretreated cellulosic biomass; critical point drying; surface area; pore size distribution; Brunauer-Emmett-Teller; cellulose; hornification

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