Enhancement of efficiency of water electrolysis for hydrogen production

In this thesis, after analyzing the properties of hydrogen in analogy to a number of common fuels, its productions methods and advantages of water electrolysis are introduced briefly. The frequency response of a water electrolysis cell is analyzed in order to examine the possibilities of reaching hi...

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Main Author:	Mazloomi, Seyedkaveh
Format:	Thesis
Language:	English
Published:	2013
Subjects:	Hydrogen Water-pipes Water - Electrolysis
Online Access:	http://psasir.upm.edu.my/id/eprint/56157/1/FK%202013%20109RR.pdf
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id	my-upm-ir.56157
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spelling	my-upm-ir.561572017-07-20T11:46:26Z Enhancement of efficiency of water electrolysis for hydrogen production 2013-03 Mazloomi, Seyedkaveh In this thesis, after analyzing the properties of hydrogen in analogy to a number of common fuels, its productions methods and advantages of water electrolysis are introduced briefly. The frequency response of a water electrolysis cell is analyzed in order to examine the possibilities of reaching higher production efficiencies in other methods of power application than steady DC mode. Conductance of such cells was observed to reach a maximum value at a certain frequency depending on the physical cell characteristics. As a result, a series of experiments were continued in order to examine the possibility of enhancing the process efficiency. Laboratory tests were performed on a cell in different voltages ranging between 2 V and 10 V, frequencies ranging between DC and 20 MHz and duty cycles varying in the range of 10% to 100%. The efficiency value was recorded for each case and the results were compared with those of DC mode. The gathered data shows water electrolysis process will be more efficient when the power is applied to the cell in the form of pulses. According to the experimental results, an efficiency enhancement of up to 14% can be achieved by applying short pulses to the system instead of a DC voltage. The result of the latter is prevention of the formation of retarding phenomena such as electrical double layers and diffusion layer in the vicinity of the electrodes. However, the production rate decreases in pulsating power application since the total amount of energy application to an electrolytic bath is remarkably reduced in pulsating voltage application mode. In other words, the time requirement of producing the same amount of hydrogen can be longer as much as near 3 times of that of low efficiency process. Hydrogen Water-pipes Water - Electrolysis 2013-03 Thesis http://psasir.upm.edu.my/id/eprint/56157/ http://psasir.upm.edu.my/id/eprint/56157/1/FK%202013%20109RR.pdf application/pdf en public masters Universiti Putra Malaysia Hydrogen Water-pipes Water - Electrolysis
institution	Universiti Putra Malaysia
collection	PSAS Institutional Repository
language	English
topic	Hydrogen Water-pipes Water - Electrolysis
spellingShingle	Hydrogen Water-pipes Water - Electrolysis Mazloomi, Seyedkaveh Enhancement of efficiency of water electrolysis for hydrogen production
description	In this thesis, after analyzing the properties of hydrogen in analogy to a number of common fuels, its productions methods and advantages of water electrolysis are introduced briefly. The frequency response of a water electrolysis cell is analyzed in order to examine the possibilities of reaching higher production efficiencies in other methods of power application than steady DC mode. Conductance of such cells was observed to reach a maximum value at a certain frequency depending on the physical cell characteristics. As a result, a series of experiments were continued in order to examine the possibility of enhancing the process efficiency. Laboratory tests were performed on a cell in different voltages ranging between 2 V and 10 V, frequencies ranging between DC and 20 MHz and duty cycles varying in the range of 10% to 100%. The efficiency value was recorded for each case and the results were compared with those of DC mode. The gathered data shows water electrolysis process will be more efficient when the power is applied to the cell in the form of pulses. According to the experimental results, an efficiency enhancement of up to 14% can be achieved by applying short pulses to the system instead of a DC voltage. The result of the latter is prevention of the formation of retarding phenomena such as electrical double layers and diffusion layer in the vicinity of the electrodes. However, the production rate decreases in pulsating power application since the total amount of energy application to an electrolytic bath is remarkably reduced in pulsating voltage application mode. In other words, the time requirement of producing the same amount of hydrogen can be longer as much as near 3 times of that of low efficiency process.
format	Thesis
qualification_level	Master's degree
author	Mazloomi, Seyedkaveh
author_facet	Mazloomi, Seyedkaveh
author_sort	Mazloomi, Seyedkaveh
title	Enhancement of efficiency of water electrolysis for hydrogen production
title_short	Enhancement of efficiency of water electrolysis for hydrogen production
title_full	Enhancement of efficiency of water electrolysis for hydrogen production
title_fullStr	Enhancement of efficiency of water electrolysis for hydrogen production
title_full_unstemmed	Enhancement of efficiency of water electrolysis for hydrogen production
title_sort	enhancement of efficiency of water electrolysis for hydrogen production
granting_institution	Universiti Putra Malaysia
publishDate	2013
url	http://psasir.upm.edu.my/id/eprint/56157/1/FK%202013%20109RR.pdf
_version_	1747812119844225024

Enhancement of efficiency of water electrolysis for hydrogen production

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