Electrochemical Production of Hydrogen

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  • Topic: Hydrogen, Electrolysis, Hydrogen production
  • Pages : 18 (1720 words )
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  • Published : April 10, 2013
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Electrochemical production of hydrogen from water
Presented by:
Heba A. Alsabagh Hiba M. Maghayreh Hiba N. Abu Zaghleh Sahar M. Alissa

University of Jordan Faculty of Engineering & Technology Department of Chemical Engineering

Supervised by:
0078381 0076527 0076528 0072918
Dr. Hatem Alsyouri

December, 2011

Chapters:
Introduction Literature Survey
Process Selection and Design Process Description Material and Energy Balances Design 2

Chapters:
 Feasibility Study and Economic Analysis  Control strategy  Plant Layout and Site  Safety and Environmental Aspects  Conclusion and Recommendation

3

Introduction
4

Introduction
The goal of this project is to study the process of electrochemical production of hydrogen gas in a renewable way. Hydrogen is the simplest element known to exist. Hydrogen has the highest energy content of any common fuel by weight, but the lowest energy content by volume.

5

Introduction
Industrial hydrogen currently produced at over 41 million tons/yr with 80% of production coming from the steam reforming of natural gas; however pollution and emission from fossil fuel already become a serious environmental issue.

6

Literature Survey
7

Literature Survey
Hydrogen Production: Hydrogen, which does not exist alone in nature, can be produced from a variety of feed stocks.

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Literature Survey
Hydrogen Production:

9

Literature Survey
Hydrogen Production:  Water Electrolysis:

Electrolysis is an electrochemical process in which electrical energy is the driving force of chemical reactions. Substances are decomposed, by passing a current through them. .

10

Literature Survey
Hydrogen Applications: Ammonia Production

Oil Refining Other Industrial Uses of H2 Metals. Chemicals. Pharmaceuticals. Electronics.

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Process Selection and Design

12

Process Selection and Design
According to the electrolyte used for electricity conduction in the process, four types of water electrolysis may be found: 1. 2. 3. 4. PEM electrolysis. Solid oxide electrolysis cell. Photoelectrolysis. Alkaline electrolysis.

13

Process Selection and Design
Comparison of different electrolysis technology:
Technology Efficiency

Alkaline Electrolysis PEM Electrolysis
Solid oxide Electrolysis Photoelectrolysis

59 – 70 % 65 – 82 %
40 – 60 % 2 – 12 %

14

Process Selection and Design
Our Selection:

According to Dr. Farqad’s experimental work, single compartment electrolyser have been selected, with 10%NaCl aqueous solution as electrolyte.

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Process Description

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Process Description

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Material and Energy Balances

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5˚C 1.8 bar 690.22 kg/h 25˚C 50˚C 50˚C 62˚C 50˚C 1 bar 1 bar 1 bar 1.8 bar 25˚C kg/h 1 bar 947.2 952.85 kg/h 947.2 kg/h 947.2 kg/h 952.85 kg/h 1 bar 5.65 kg/h

5˚C 1.8 bar 947.2 kg/h 5˚C 1.8 bar 256.98 kg/h

19

Design
20

Design
Photovoltaic system:

 PV array  Charge Controller  Battery  Inverter

21

Design
Distribution of sun irradiation in Jordan.

22

Design
Photovoltaic system:
Specification
Type of Solar Panel Number of solar panel needed Module efficiency, % System voltage, Vdc Dimensions, mm Weight, kg Type of battery used Battery voltage, V Amp- hour rating for the battery, Ah Number of batteries needed

Value
300 Wp Mono-crystalline 114 15.4 1000 1965×990×45 22.8 Deep cycle battery 12 50 28

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Design
Connection of PV modules :

24

Design
Configuration of the batteries:

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Design
Mixer (MIX-101):
Specification Material of construction Wall thickness, mm Residence time, hr Tank volume, m3 The impeller Type Impeller diameter, m Impeller blade width, m Baffles Four vertical baffles width, m

Value stainless steel 316L 0.5069 1 0.9704
4-blade 458 pitched blade (4BP) 0.3577 0.0715 0.1073

26

Design
coil specifications & calculated variables:
Specification Coil diameter, m
Coil Pitch, m Distance...
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