RE: Storage27 Aug 2021 11:22
Perhaps the justification from Linde and others lies in the fact that there is not currently sufficient renewable-generated electricity available that would drive all the electrolysers that would be required to meet even current H2 demand. If the electricity isn't green then the hydrogen produced by the electrolyser isn't green.
I think that's why quite a lot of the projects we see (other than small-scale demonstrator projects) are partnered with either a new proposed wind farm or solar array, or even just a dedicated individual turbine.
I don't think this picture is going to change much until we start reaching very large levels of intermittent over-supply from wind and solar, which is probably going to be nearer the tail-end of this decade. I don't see the facts around generation likely to change, that being you have to closely match generation with demand. If you can't increase demand then you have to turn off some generation. In the UK the current priority is to switch off coal, then turn down gas, then start to curtail wind. The recent comments from KK suggests that even the UK government are starting to recognise that curtailment payments to wind farms are unacceptable when you could at least produce something from that energy, specifically hydrogen, rather than waste its potential.
Blue hydrogen may justifiably fill a short term gap, but in order to meet fully renewable electricity demands we will have to over-build solar and wind capacity by some margin in order to achieve the average required supply. You can either keep chopping off the peaks through curtailment and ignore that energy, or store that energy as molecules for some additional benefit. I believe once that becomes the natural process of energy management then it will be scaled massively. Its the obvious choice because the market for the hydrogen produced is easy to see and, as previously discussed, batteries can't do the same job at that scale (for wind). That way, once green hydrogen is produced at scale then blue hydrogen production ought to tail-off as people start to recognise its hidden/ignored costs.
I just hope I live long enough to see it play out in my favour. It's going to be a long bumpy ride.