RESPONSE SURFACE OPTIMIZATION STUDIES OF THE ACID-CATALYSED HYDROLYSIS OF HAZELNUT SHELLS

Year 2015, Volume: 3 Issue: 3, 51 - 61, 12.03.2015

Yeşim Arslan

Abstract

The utilization of hazelnut shells as a renewable and low cost lignocellulosic biomass for bioethanol production requires  the optimization  of hydrolysis step. A comprehensive, experimental and modeling study on the acid hydrolysis of hazelnut shells is reported at variable sulfuric acid concentrations (0.1-0.7 M) and temperatures (100-120 ^oC) where a solid to liquid ratio is 1/7. The influence of the acid concentration, the temperature and reaction time on reducing sugar as well as the degradation product furan levels were evaluated by performing a 3³ full factorial experimental design. The analysis of the optimum combinations of independent variables indicates that a high acid concentration and a moderate temperature may provide the optimum acid hydrolysis conditions for hazelnut shells. 

Keywords

Hazelnut shells, hemicellulose, acid hydrolysis, factorial experimental design

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