Kinetic Study of Dilute Acid Hydrolysis of Cowpea Seed Husk for Production of Glucose

Madu Ebere Okechukwu *

Department of Chemical Engineering, Nnamdi Azikiwe University, Awka, Anambra State, Nigeria.

Nwabanne Joseph Tagbo

Department of Chemical Engineering, Nnamdi Azikiwe University, Awka, Anambra State, Nigeria.

Onu Chijioke Elijah

Department of Chemical Engineering, Nnamdi Azikiwe University, Awka, Anambra State, Nigeria.

Ifeanyi Chinwuba Edwin Umeghalu

Department of Agriculture and Bioresource Engineering, Nnamdi Azikiwe University, Awka, Anambra State, Nigeria.

*Author to whom correspondence should be addressed.


Abstract

Acid hydrolysis of Cowpea seed husk was carried out using sulphuric acid with the concentrations of 0.1 M and 0.5 M at a reaction time of 10 to 90 minutes and temperatures of 130ºC to 170ºC. The substrates were characterised using proximate analysis. The effects of process parameters that were studied on glucose yield were; time, temperature, substrate concentration, and acid concentration. The experimental data obtained for glucose yield were fitted into the Saeman’s model and Two –fraction models. The result obtained from the proximate analysis shows that cowpea seed husk has a cellulose content of 31.7%, hemicelluloses of 26.7% and lignin 6.1%. The maximum glucose yield of 27.1% was obtained at temperature of 150ºC, a reaction time of 50 minutes, 0.02 g/ml substrate concentration, and 0.5 M acid concentration. The two-fraction model gave a better fit of the experimental data over saeman’s model. From the study it is concluded that cowpea seed husk can be a good source for glucose production.

Keywords: Acid hydrolysis, cowpea seed husk, kinetics parameters, glucose concentration, seaman model, two-fraction model.


How to Cite

Okechukwu, M. E., Joseph Tagbo, N., Chijioke Elijah, O., & Edwin Umeghalu, I. C. (2020). Kinetic Study of Dilute Acid Hydrolysis of Cowpea Seed Husk for Production of Glucose. Journal of Materials Science Research and Reviews, 2(4), 564–573. Retrieved from https://journaljmsrr.com/index.php/JMSRR/article/view/63

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