Hydrogen production by the electrolysis of saline water

(1992) Hydrogen production by the electrolysis of saline water. Masters thesis, King Fahd University of Petroleum and Minerals.

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English Abstract

In this research, the electrolysis of sea water is carried out for the production of hydrogen. Natural as well as synthetic sea water with a concentration of 0.14-2 times that of sea water is electrolyzed. A modified Hoffman electrolysis cell is used. Both electric energy (DC) and solar energy are used to electrolyze the water. A number of parameters are investigated including current density, voltage, and quantity of electricity in the range of : 25-126 mA/cm, 6-20 v, and 500-1500 c respectively. Their effects on the cell performance are studied and reported as follows. Hydrogen is produced at a current efficiency of 99%. Its production is current density dependent, and increases with the salinity (T.D.S.) for a given voltage. Precipitates consisting mainly of Mg(OH)2, are formed at the cathode and their rate of formation is found to be proportional to T.D.S. Samples of the precipitate are analyzed and results are reported. Chlorine on the other hand, results at the anode. Typical molar ratios for hydrogen, chlorine and oxygen obtained for sea water in the range of 500-1500 C are :H/Total C1? is 1.2-1,4, H?/ (C1? in gas phase) is 7-215, C1?/O? is 3-4.6. Similar results for other salinities are reported in the text.

Item Type: Thesis (Masters)
Subjects: Chemical Engineering
Divisions: College Of Engineering Sciences > Chemical Engineering Dept
Committee Advisor: Abdel-Aal, H. K.
Committee Members: Al-Saleh, Muhammad A. and Abderrahman, Walid
Depositing User: Mr. Admin Admin
Date Deposited: 22 Jun 2008 16:53
Last Modified: 01 Nov 2019 16:53
URI: http://eprints.kfupm.edu.sa/id/eprint/9984