H2Tech - Electrolyzer Handbook 2022 - 123

2022 ELECTROLYZER HANDBOOK
PRODUCT CATEGORIES
COMPANY INDEX
SOLID OXIDE ELECTROLYSIS CELL (SOEC)
Haldor Topsoe SOEC
DESCRIPTION: Haldor Topsoe's electrolyzer is based on high-temperature solid oxide
electrolyzer cell (SOEC). The SOEC is built of abundant and low-cost ceramic materials
in a metal housing and uses electricity to split water molecules into hydrogen
and oxygen. It delivers up to 30% more green hydrogen from the same amount
of renewable electricity, compared to standard technologies like PEM and alkaline
electrolysis. The high conversion efficiency is a result of favorable thermodynamics
and kinetics at higher operating temperatures above 700°C, which sets it apart from
standard electrolysis technologies.
Haldor Topsoe delivers the SOEC electrolysis unit as a stand-alone unit with
power and gas connections or as part of an end-to-end solution for green chemicals.
The modular design allows for flexibility in plant size and operation. The facility is fully
automated with a user-friendly interface.
SPECIFICATIONS:
Core capacity
* H2 production capacity: 32,000 Nm3/hr
* Turn down ratio, at plant level: 10%-100%
Product conditions
* Pressure at battery limit (BL): 2 barg
* Pressure H2 product: Per customer requirement
* Temperature H2 at BL: Ambient
* Hydrogen purity: Up to 99.999% (dry basis after gas cleaning)
Feed conditions
* Demineralized water: 27,000 kg/hr
Power input
* Total stack power consumption: 100 MW
* Specific power consumption, stack level (DC, BoL): 3.1 kWh/Nm3
* Specific power consumption, plant level (AC, BoL):
depends on heat integration and H2 pressure
* Steam supply (if available): flow rate depending on pressure level
Other specs
* Approximate footprint including BoP: 8,400 m2
* Electricity supply at plant BL: 24 kV (6-24 kV possible)
Fig. 1. SOEC BL
Fig. 2. 20 MW hydrogen plant for green steel production
ADVANTAGES/KEY FEATURES:
* 30% higher green hydrogen output compared to other electrolysis
technologies
* Cost-competitive hydrogen production
* Easy integration with other industrial processes
* Production on-site and on-demand
* Multiple sizes and purity options
* High load flexibility
* Flexible production capacity and industrial scalability
Continued 
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H2Tech - Electrolyzer Handbook 2022

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