Five-Factor Response Surface Optimisation of Hydrochloric Acid Dissolution of Alumina from a Nigerian Clay

Arid Zone Journal of Engineering, Technology and Environment

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Title Five-Factor Response Surface Optimisation of Hydrochloric Acid Dissolution of Alumina from a Nigerian Clay
 
Creator Orugba, H. O.
Onukwuli, O. D.
Babayemi, A. K.
Umezuegbu, J. C.
 
Subject Clay
Leaching
Alumina
Optimization
hydrochloric acid
 
Description The major challenge encountered in the process of making the acid dissolution of alumina from clays economically viable is the determination of the optimum conditions of the key process variables in order to enhance efficient recovery. High alumina recovery from clays can be achieved by determining the optimum conditions of the process variables during optimization. In this research, using the experimental design, the combined effects of five independent variables (calcination temperature, leaching temperature, acid concentration, stirring speed and liquid/solid ratio) on the yield of alumina from the local clay was studied and the second order polynomial regression equation was developed to evaluate the influence of the five independent variables on alumina yield. Model adequacy test was performed using the analysis of variance (ANOVA) and 0.9209 was obtained as the correlation value between the experimental responses and the predicted responses.  The optimum yield of alumina was obtained as 80.07% at 677.27°C heat of activation; 65.18°C leaching temperature; 1.9mol/cm3HCl concentration; 10.36 liquid-solid weight ratio and 442.92rpm stirring speed.
 
Publisher FACULTY OF ENGINEERING, UNIVERSITY OF MAIDUGURI, NIGERIA
 
Date 2020-12-07
 
Type info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
Peer-reviewed Article
 
Format application/pdf
 
Identifier https://azojete.com.ng/index.php/azojete/article/view/384
 
Source ARID ZONE JOURNAL OF ENGINEERING, TECHNOLOGY AND ENVIRONMENT; Vol. 16 No. 4 (2020); 821-832
2545-5818
1596-2490
 
Language eng
 
Relation https://azojete.com.ng/index.php/azojete/article/view/384/269
 
Rights Copyright (c) 2020 Arid Zone Journal of Engineering, Technology and Environment published by University of Maiduguri, Nigeria.
https://creativecommons.org/licenses/by-nc-nd/4.0
 

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