Work

Removal of hemicelluloses by NaOH pre-extraction from aspen chips prior to mechanical pulping

Year: 2011

Type: article

Abstract: chips prior to mechanical pulping, which would offer new feedstocks for the production of chemicals and fuels. The aim of this study was to evaluate pre-extraction to maximize pre-extraction yield, while minimizing negative impacts on wood chips. The effects of three independent process variables (NaOH charge, pre-extraction temperature, and time) on three dependent variables (pre-extraction yield, xylan extraction yield, and cellulose content based on original wood) were studied using a Box-Behnken experimental design. The mathematical models were obtained and validated well. It was found that NaOH charge, time, interaction between NaOH charge and time, and interaction between temperature and time have significant effects on xylan extraction yield. The xylan extraction yield was 22.55%; i.e., about 37.3 kg of xylan could be extracted from one ton of oven-dried aspen chips under the conditions of 5.68% NaOH charge, 100 °C, and 35 min.

Source: BioResources

DOI: 10.15376/biores.6.3.3469-3480

Authors: Wei Liu, Zhirun Yuan, Changbin Mao, Qingxi Hou, Kecheng Li

Institutions: University of New Brunswick, Tianjin University of Science and Technology, FPInnovations

Language: English

Topic: Lignin and Wood Chemistry

Subfield: Process Chemistry and Technology

Field: Chemical Engineering

Domain: Physical Sciences

SDG: Responsible consumption and production

Open Access status: gold

Estimated APC paid: $1,452