White Paper

Green Hydrogen: Meeting the challenges of increased load, intermittency and decarbonization

image credit: Siemens
Holt Bradshaw's picture
Holt Bradshaw
Principal Consultant Siemens Energy Business Advisory

Holt applies nearly 30 years of energy sector experience to provide technical, economic, and business consulting services to global energy suppliers, utilities, developers, consumers, investors...

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  • Mar 23, 2021 11:03 pm GMT
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This item is part of the Special Issue - 2021-03 - Power Generation, click here for more

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Robin Duquette's picture
Robin Duquette on Mar 30, 2021

Thanks for sharing this report. How does the "green" premium related to green hydrogen (i.e., the combination of renewable energy and H2 production) compare with carbon capture coupled to existing thermal plants to deal with intermittency and decarbonization?

Annette Frotjold's picture
Annette Frotjold on Apr 6, 2021

Why would carbon capture be a good option? 2/3 of the CO2 is oxygen (oxygen capture is more accurate than carbon capture), and it worries me that billions of tons of oxygen shall be removed from the atmosphere every year. We are also loosing a lot of forests worldwide yearly - and trees are our main producers of oxygen (they convert CO2 to O2!) and now we will start removing oxygen artificially as well. So we have two big drivers to remove oxygen from the atmosphere; deforestation and CCS. I know some people say that there's plenty of oxygen in the atmosphere, but there's a limit to everything, and when we humans scale things up, the consequences tend to be dramatic, and we have proven that we are capable of creating devastating imbalances in the atmosphere already. CCS will drain oxygen from the atmosphere - is this really a good idea?

Matt Chester's picture
Matt Chester on Apr 6, 2021

What about timber? Trees naturally sequester CO2 and then when we take the wood from those trees we then are capturing and removing from the atmosphere that CO2 until decades or more later when the wood might get burnt? Isn't carbon capture just doing the same thing-- extracting the CO2 from the air and storing it in physical assets on ground or underground? 

Robin Duquette's picture
Robin Duquette on Apr 6, 2021

The world produces about 51 billion tons of CO2e annually. If we had to capture all of these emissions, it would represent annually about 37 billion tons of oxygen eventually excluded from the atmosphere. Since we have about 1,200,000 billion tons of oxygen in the atmosphere, it only represents 0.004%. Therefore, carbon capture can represent a pragmatic solution for the foreseeable future to achieve net-zero until we find better alternatives.

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