Commercial Electrolyzer Technologies

Electrolyzers produced in 2006 range in sizes from less than 0.1 kg day-1 to over 1000 kg day-1. The smallest systems, in the under 0.5-kg day-1 range, are used for the production of hydrogen at the lab scale, and are designed as hazard-free alternatives to high pressure gas cylinders.26 Electrolyzers are sized to meet the system requirements of the existing high purity hydrogen markets. However, only systems above the 0.55-kg day-1 production rate are viable for producing hydrogen as a transportation fuel, and the transportation fueling market could use systems larger than the existing 1000-kg day-1 unit. A 0.055-kg day-1 system would produce 200 kg year-1, enough to fuel a single car. A 1000-kg day-1 system would produce 365,000 kg year-1, enough to fuel 1,800 vehicles. Both of these values assume a 100% capacity factor on the electrolysis system. Typically, these units are capable of operations in the high 90% range.27 The number of cars served by a system was determined by calculating that a car requires approximately 200 kg of hydrogen year-1. This 200-kg requirement assumes that on average a car travels 12,000 miles year-1, and that a vehicle will travel 60 miles kg-1 of hydrogen.28

Electrolysis systems that could be used for transportation fuel production can be categorized into five different size ranges: home, small neighborhood, neighborhood, small forecourt and forecourt.28 The term forecourt refers to a refueling station. The number of cars served and hydrogen production rate for each size are as follows:

• The home size will serve the fuel needs of 1-5 cars with a hydrogen production rate of 200-1000-kg hydrogen year-1.

• The small neighborhood size will serve the fuel needs of 5-50 cars with a hydrogen production rate of 1000-10,000-kg hydrogen year-1.

• The neighborhood size will serve the fuel needs of 50-150 cars with a hydrogen production rate of 10,000-30,000-kg hydrogen year-1.

• The small forecourt size, which could be a single hydrogen pump at an existing station, will serve 150-500 cars with a hydrogen production rate of 30,000-100,000-kg hydrogen year-1.

• A full hydrogen forecourt will serve more then 500-cars per year with a hydrogen production rate of greater then 100,000-kg hydrogen year-1.

A sampling of electrolyzer manufacturers in 2006 are presented in Table 2.

Table 2. Commercial electrolyzer manufacturers and selected performance data.

Manufacturer

Technology

Lower capacity

Upper capacity

Pressure

Location

Ref.

(kg day-1) (kg day-1)

AccaGen SA

Alkaline, acid

0.043

215.7

up to 200 barg

Switzerland

29

and PEM

Avalance

Alkaline

0.75

300.

up to 6500 psig

Connecticut, USA

6

ELT

Alkaline

6.47

1639.4

up to 30 barg

Germany

5

Gesellschaft fur

Unknown

25.9

1078.6

30 barg

Germany

30

Hochleistungselktrolys

eure zur

Wasserstofferzeugung

Giner

PEM

11.8

11.8

3000 psig

Massachusetts, USA

31

Hamilton Sundstrand

PEM

129.3

129.3

up to 100 psig

Connecticut, USA

32

Hydrogenics

PEM and alkaline

10.8

129.4

up to 363 psig

Canada

33

Industrie Haute Techno-

Alkaline

1639.4

1639.4

up to 32 barg

Monthey,

34

logie SA

Switzerland

Linde

Unknown

10.8

539.3

25 barg

Germany

35

Norsk Hydro

Alkaline

129.4

1046.2

15 barg

Norway

36

Peak Scientific

Ion exchange membrane

0.01

0.01

0-100 psig

Scotland

30

PIEL division of ILT

Alkaline

2.2

30.2

3 barg

Italy

31

Technology s.r.l.

Proton Energy System

PEM

1.1

12.9

up to 218 psig

Connecticut USA

32

Schmidlin-DBS AG

Membrane

0.005

0.026

1-155 psig

Neuheim,

37

Switzerland and Padova, Italy

Siam Water Flame Co.

Alkaline

0.647

0.647

unknown

Bangkok, Thailand

38

Teledyne Energy Sys-

Alkaline

6.5

129.4

up to 115 psig

Maryland, USA

39

tems

Treadwell Corporation

PEM

2.6

22.0

up to 1100 psi

Connecticut, USA

40

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Responses

  • temshe
    What size electrolyzer?
    7 years ago

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