The biggest concern of households in our different municipalities remains access to stable, quality energy, respect for the environment, and above all a lower cost. The increase in oil prices and greenhouse gas emissions have led to the search for substitutes for fossil fuels. In Cameroon, the abundance of lignocellulosic resources is inherent to agricultural activity. Production of bioethanol remains a challenge given the crystallinity of cellulose and the presence of the complex. The pretreatment aimed to solubilize the lignin fraction and to make cellulose more accessible to the hydrolytic enzymes was done using the organosolv process. Mathematical modeling was performed to point out the effect of the temperature on the kinetics of the release of the reducing sugars during the pretreatment. The aim of the study is to optimize the pretreatment of the mixture of cassava peelings and pineapple fibers for bioethanol production. Two mathematical models such as SAEMAN's model and Response surface methodology were used. The first shows that the kinetic parameters of the hydrolysis of the cellulose and reducing sugar are: 0.05089 min-1, 5358.1461 J.mol-1, 1383.03691 min-1, 51577.6100 J.mol-1 respectively. In order to better control this pre-treatment step, modeling by the second model was used. Temperature is the factor having the most positive influence whereas, ethanol concentration is not an essential factor. The model equation reveals that this positive contribution is significant on the Response surface and not significant on the cellulose. To release the maximum, an organosolv pre-treatment of this substrate should be carried out at 209.08°C for 47.60 min with an ethanol-water ratio of 24.02%. Organosolv pre-treatment is an effective process for the delignification of the lignocellulosic structure. To improve this work, it would be wise to carry out a technical-economic analysis of the process and make an energy assessment of the installation.
Author (s) Details
Jeanne Atchana
Department of Chemical Engineering, at the Higher Teacher’s Training
School, University of Douala, Cameroon.
Paul Nestor Djomou
Djonga
Department of Textile and Leather Engineering, National Advanced School of
Engineering of Maroua, Maroua, Cameroon and Department of Environmental Engineering,
National Advanced School of Public Works, PO Box 510 Yaoundé, Cameroon.
Judith Ngbara
Department of Physics, Faculty of Science, University of Bangui PO Box 908,
Bangui, Central African Republic.
André Talla
Department of Environmental Engineering, National Advanced School of Public
Works, PO Box 510 Yaoundé, Cameroon and Department of Energy Engineering,
National Advanced School of Engineering, University of Yaoundé, Cameroon.
George Elambo Nkeng
Department of Environmental Engineering, National Advanced School of Public
Works, PO Box 510 Yaoundé, Cameroon.
Doumbia Awa Seronfe
Centre de Recherche et de Formation pour l’Industrie Textile (CERFITEX),
BP: 323 Ségoul, Mali.
Please see the book here:- https://doi.org/10.9734/bpi/srnta/v2/1015
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