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Reactivity of glucan and xylan in corn stover: Effect of pelleting and deacetylation on dilute acid pretreatment


  • Godin, B. , Nagle, N. , Delcarte, J. & Wolfrum, E. (2016). Reactivity of glucan and xylan in corn stover: Effect of pelleting and deacetylation on dilute acid pretreatment. Proceedings in: «La chimie verte, une industrie d’avenir», 12 May 2016, Gembloux, Belgium,
Type Conference Proceedings
Year of conference 2016
Title Reactivity of glucan and xylan in corn stover: Effect of pelleting and deacetylation on dilute acid pretreatment
Conference name «La chimie verte, une industrie d’avenir», 12 May 2016, Gembloux, Belgium
Label U13-Godin-2016
Abstract It is essential to maximize the production of monomeric carbohydrates from glucan (cellulose) and xylan (hemicelluloses) of feedstock for biofuel processes to be economically efficient. It is also important to improve the logistics of these processes by increasing the density of feedstock. The maximization of the monomeric carbohydrate production can be accomplished by using a pretreatment enhancing the reactivity such as deacetylation. It is a dilute NaOH pretreatment enabling to remove the acetyl groups of xylan. The densification of feedstock can be achieved by pelleting. A laboratory-scale screening tool (ASE350) working at relevant biofuel process conditions has been used to evaluate the effect on the combined reactivity of glucan and xylan of corn stover (Zea mays L.) made by pelleleting and by deacetylation. Three different temperatures of dilute acid pretreatment have been studied: 130°C, 150°C and 170°C. Two different acid concentration of dilute acid pretreatment have been studied: 0.5% H2SO4 and 1.0% H2SO4. Deacetylation before dilute acid pretreatment enables a major improvement of corn stover reactivity. When corn stover is deacetylated, temperature and acid concentration of dilute acid pretreatment, and pelleting don’t affect its reactivity. Pelleting doesn’t improve the reactivity of deacetylated corn stover. However, pelleting enables a minor improvement of reactivity of none deacetylated corn stover. When corn stover is not deacetylated, temperature and acid concentration of dilute acid pretreatment, and pelleting improve its reactivity. Higher pretreatment severity reduces the differences in recalcitrance among feedstocks and the effect of additional preprocessing.
Fichier Reactivity of glucan and xylan in corn stover: Effect of pelleting and deacetylation on dilute acid pretreatment
Authors Godin, B. , Nagle, N. , Delcarte, J. & Wolfrum, E.