Woody biomass pretreatment for cellulosic ethanol production: Technology and energy consumption evaluation.

Abstract:

:This review presents a comprehensive discussion of the key technical issues in woody biomass pretreatment: barriers to efficient cellulose saccharification, pretreatment energy consumption, in particular energy consumed for wood-size reduction, and criteria to evaluate the performance of a pretreatment. A post-chemical pretreatment size-reduction approach is proposed to significantly reduce mechanical energy consumption. Because the ultimate goal of biofuel production is net energy output, a concept of pretreatment energy efficiency (kg/MJ) based on the total sugar recovery (kg/kg wood) divided by the energy consumption in pretreatment (MJ/kg wood) is defined. It is then used to evaluate the performances of three of the most promising pretreatment technologies: steam explosion, organosolv, and sulfite pretreatment to overcome lignocelluloses recalcitrance (SPORL) for softwood pretreatment. The present study found that SPORL is the most efficient process and produced highest sugar yield. Other important issues, such as the effects of lignin on substrate saccharification and the effects of pretreatment on high-value lignin utilization in woody biomass pretreatment, are also discussed.

journal_name

Bioresour Technol

journal_title

Bioresource technology

authors

Zhu JY,Pan XJ

doi

10.1016/j.biortech.2009.11.007

subject

Has Abstract

pub_date

2010-07-01 00:00:00

pages

4992-5002

issue

13

eissn

0960-8524

issn

1873-2976

pii

S0960-8524(09)01511-9

journal_volume

101

pub_type

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