title: Optimization of hydrous ferrous sulfate dehydration by microwave heating using response surface methodology.
abstract: The work relates to assessing the ability of the microwave for dehydration of large amount of waste hydrous ferrous sulfate generated from the titanium pigment process industry. The popular process optimization tool of response surface methodology with central composite design was adopted to estimate the effect of dehydration. The process variables were chosen to be power input, duration of heating and the bed thickness, while the response variable being the weight loss. An increase in all the three process variables were found to significantly increase the weight loss, while the effect of interaction among the parameters were found to be insignificant. The optimized process conditions that contribute to the maximum weight loss were identified to be a power input of 960 W, duration of heating of 14 min and bed thickness of 5 cm, resulting in a weight loss of 31.44%. The validity of the optimization process was tested with the repeat runs at optimized conditions.
authors.affiliation: Key Laboratory of Unconventional Metallurgy, Ministry of Education, Kunming University of Science and Technology, Kunming 650093, China.
authors.forename: Yan-Tao
authors.initials: YT
authors.lastname: Yu
authors.affiliation: Key Laboratory of Unconventional Metallurgy, Ministry of Education, Kunming University of Science and Technology, Kunming 650093, China.
authors.forename: Bing-Guo
authors.initials: BG
authors.lastname: Liu
authors.affiliation: Key Laboratory of Unconventional Metallurgy, Ministry of Education, Kunming University of Science and Technology, Kunming 650093, China.
authors.forename: Guo
authors.initials: G
authors.lastname: Chen
authors.affiliation: Key Laboratory of Unconventional Metallurgy, Ministry of Education, Kunming University of Science and Technology, Kunming 650093, China.
authors.forename: Jin-Hui
authors.initials: JH
authors.lastname: Peng
authors.affiliation: Chemical Engineering Program, The Petroleum Institute, P.O. Box 2533, Abu Dhabi, United Arab Emirates.
authors.forename: C
authors.initials: C
authors.lastname: Srinivasakannan
mesh_terms: D020650:Combinatorial Chemistry Techniques / Q000379:methods*; D003198:Computer Simulation; D003890:Desiccation / Q000379:methods*; D005296:Ferrous Compounds / Q000737:chemistry* / Q000302:isolation & purification* / Q000528:radiation effects; D006361:Heating / Q000379:methods*; D007220:Industrial Waste / Q000517:prevention & control*; D008422:Materials Testing; D008956:Models, Chemical; D015233:Models, Statistical; D014867:Water / Q000737:chemistry*
chemical_list: D005296:Ferrous Compounds; D007220:Industrial Waste; D014867:Water; C020748:ferrous sulfate