[ certification ]
Case study : PEM electrolyser
To document the environmental friendliness of its 6 MW PEM electrolyser , an operator commissioned TÜV SÜD to conduct certification in accordance with the GreenHydrogen standard . The proton-exchange membrane ( PEM ) method produces hydrogen for fuel cells and heating purposes . The electrolyser stacks generate green hydrogen using electricity from wind power and hydropower . This hydrogen is first purified and dried and partially fed into the existing gas grid . However , since the hydrogen is primarily intended for the mobility sector , most of it is transported in truck trailers to nearby hydrogen filling stations .
TÜV SÜD analysed the entire value chain from production to cleaning , compression , filling , and transport , and determined the emission value at 15 gCO 2eq
/ MJ H2
– almost 50 % below the required limit ( 28.2 gCO 2eq
/ MJ H2
). The operator was thus able to use the GreenHydrogen certificate as proof of its achievement of over 80 % in emission reduction compared to conventional hydrogen .
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Conclusion
Until the EU finalises its own harmonised rules and standards , voluntary certification schemes offer transparency and advantages for sales . With TÜV SÜD ' s GreenHydrogen certificate , manufacturers raise their brand profile and prove that their hydrogen reduces emissions along the entire value chain . They are thus well prepared for future EU requirements and regulations .