Ultrasonic pretreatment of wheat straw in oxidative and nonoxidative conditions aided with microwave heating

M.J. Bussemaker, X. Mu, Dongke Zhang

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

Ultrasound was shown to enhance pretreatment of lignocellulose for biofuel and biorefinery applications and can augment oxidative processes, yet few studies have combined ultrasound with an oxidative environment for the pretreatment of lignocellulose. In the present contribution, pretreatment of a wheat straw using a combination of ultrasound with two oxidative pretreatments, peracetic acid and hydrogen peroxide, as well as water and acetic acid was tested. The experimentation was conducted in an ultrasonic-microwave reactor with a comparison to silent pretreatment with microwave heating alone. In addition, thermal heating was compared to microwave heating for the water pretreatment. Ultrasound produced a higher purity solid residue for all chemical pretreatments. However, ultrasound pretreatment reduced the delignification efficacy by up to 50%, attributed to lignin condensation. The chemical treatments were affected by sonolysis reactions and altered the recoverability of the solubilized carbohydrates. © 2013 American Chemical Society.
Original languageEnglish
Pages (from-to)12514-12522
JournalIndustrial and Engineering Chemistry Research
Volume52
Issue number35
DOIs
Publication statusPublished - 2013

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