As at this time, the Colours of Hydrogen designate from where the various sources of Hydrogen originate and where and how the by products of manufacture of Hydrogen are stored or dealt with. A simple guide to these is as follows…
GREY HYDROGEN – this is Hydrogen extracted from fossil fuels such as coal, naphtha, LPG and or course natural gas. No more than that!
BLUE HYDROGEN – this is Hydrogen also produced from fossil fuels…but in association with some form of carbon capture, utilisation and storage. The second part is commonly referred to as CCUS.
TURQUOISE HYDROGEN – this is Hydrogen co-produced with carbon black by the pyrolysis of natural gas…or in other words, the decomposition of natural gas at high temperatures with the aid of a catalyst.
GREEN HYDROGEN – this is produced using renewables such as solar power, hydropower, wind generation and electrolysers. Most commonly referred to as the splitting of water into its component elements of two atoms of Hydrogen and one atom of Oxygen. This is the only process that does not have a fossil fuel as a power source and as a feedstock.
Each colour of Hydrogen has different production costs as well as environmental costs. Grey Hydrogen is seen as the cheapest to produce in monetary terms, but has a high environmental cost. Blue Hydrogen can be less expensive monetarily than Green Hydrogen without the environmental impact of Grey Hydrogen…but it still utilises non-renewable fossil fuels as a feedstock.
Around 50% of the Hydrogen produced in the world comes from a process known as Methane Steam Reforming (MSR). This is the least expensive way
CH4 + H20 + HEAT = CO + 3H2
24 | ADMISI - The Ghost In The Machine | Q4 Edition 2021
Page 1 |
Page 2 |
Page 3 |
Page 4 |
Page 5 |
Page 6 |
Page 7 |
Page 8 |
Page 9 |
Page 10 |
Page 11 |
Page 12 |
Page 13 |
Page 14 |
Page 15 |
Page 16 |
Page 17 |
Page 18 |
Page 19 |
Page 20 |
Page 21 |
Page 22 |
Page 23 |
Page 24 |
Page 25 |
Page 26 |
Page 27 |
Page 28 |
Page 29 |
Page 30
