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Abstract
Background: The literature does not contain any systematic study on the effects of operating variables in dilute acid pretreatment of poplar wood. Results & discussion: This article reports experimental-determined effects of operating variables on energy consumption, water usage, sugar yield and pretreatment energy efficiency (PEE) in dilute acid pretreatment of poplar wood. As pretreatment time increased, energy consumption, water usage and sugar yield increased; PEE first increased and then decreased. As pretreatment temperature increased, energy consumption and water usage increased; sugar yield and PPE first increased and then became constant or decreased. As acid concentration increased, energy consumption and water usage did not change noticeably; sugar yield and PEE first increased and then decreased. Conclusion: Pretreatment conditions resulting in higher sugar yield in hydrolysis normally consumed more electric power in pretreatment.
Financial & competing interests disclosure
The authors acknowledge the China Scholarship Council for providing scholarships for X Song and M Zhang. The authors also acknowledge K Zhang and F Xu in the Department of Biological and Agricultural Engineering at Kansas State University, USA, for their assistance in sugar analysis using high-performance liquid chromatography. This study is partly supported by National Science Foundation Award No. CMMI-0970112. The authors have no other relevant affiliations or financial involvement with any organization or entity with a financial interest in or financial conflict with the subject matter or materials discussed in the manuscript apart from those disclosed.
No writing assistance was utilized in the production of this manuscript.