Carbon Dioxide or popularly known as Carbon emission is a Potent “Green House Gas” known to cause Global warming and climate change. World over , the efforts are on to save the planet for reducing Carbon emissions and It is a no Brainer to understand that A Green fuel is one which Produces Zero Carbon emission during combustion process to produce energy /electricity.
Before we have a look at all our current fuels one by one to see if it fits in to our definition of Green fuel, let us define renewable and non-renewable sources of energy.
Renewable sources- these are the sources which are naturally available in plenty and for ever…e.g. Wind, Solar, Hydro, Bio-mass. Interestingly, all Renewable sources of energy donot produce any carbon emissions during the electricity/energy production , though Bio mass is an exception.
Non-renewable- All fossil fuels that includes Coal, all petroleum fuels such as diesel, petrol, LPG …these fuel resources are fast depleting… these non-renewable sources are the real culprits for producing carbon emissions during the process of energy production.
Green Fuel Revolution
(1) Diesel /Petrol / LPG /CNG /Coal - As said earlier these fuels produce carbon emissions and so these are not green, though CNG may be the best out of the lot as one molecule of methane produces just one molecule of Carbon dioxide, as against one molecule of diesel could produce as high as 16 molecules of CO2 and petrol as high as 8 molecules of CO2 approx.
(2) Ethanol- C2H5OH…whether it is 1G or 2G …can not be a green fuel as it produces carbon dioxide…one molecule of ethanol if burnt can produce 2 molecules of Carbon dioxide…so it is next best fuel after Methane/ natural Gas /CNG as far as Carbon emissions are concerned.
(3) Bio-mass - the Bio-mass is plenty in the world and can be used to produce energy for example bio-mass can be converted to ethanol -2G and ethanol can be used as a fuel…it can not be a Green Fuel since it produces carbon emissions.
(4) Electric vehicles using battery as source of power…currently the battery needs to be charged with electricity and 75% of our country’ s current electricity production is through Coal…so EV can not be classified as Green fuel vehicles…unless the battery gets charged by electricity produced by solar or wind power.
(5) Ammonia NH3 can be used as a fuel or even as a hydrogen carrier and can be called as a green fuel since no carbon emissions are involved. It does have potential…but since Ammonia is made out of Hydrogen, let us discuss Hydrogen in detail
(6) Hydrogen -H2…
Yes it can be called as the ultimate Green fuel as in combustion , only steam is produced…
However, there is a caveat…
if Hydrogen is produced from a fossil fuel or a hydrocarbon fuel, Carbon dioxide becomes a bye-product…Hydrogen so produced can not be Green hydrogen.
If Hydrogen is produced by electrolysis of water and the electricity so used is from thermal power plants …it can not be a Green hydrogen…
However, if Hydrogen is produced by electrolysis of water through electricity produced by Solar /wind, it can be called as Green Hydrogen …and this is the ultimate Green fuel the world is looking for …
Currently, two major consumers of World’s Hydrogen production capacity are Fertiliser plants (55%) and Petroleum refineries (45% ).
Fertiliser plants use hydrogen to produce ammonia , DAP…and Petroleum refineries use hydrogen for producing lighter fractions from heavier fractions by a process called Hydro-cracking… They also need hydrogen for
de-sulphursing fuels to meet Euro norms.
How Hydrogen is produced currently ?
48% of World’s Hydrogen production is from Natural Gas through different processes such as steam reforming, methane pyrolysis, partial oxidation.
30% of Hydrogen production is met through oil/ naphtha reforming …
18% Hydrogen production is met through coal gasification…
Only 4 % of global Hydrogen production is the real Green Hydrogen produced by electrolysis of water through electricity power from wind /solar…so zero carbon emissions…
And this is the bull’s eye where the whole world is working.
A couple of informative articles attached …
Top 5 companies leading the Green revolution…authored by equity masters … surprisingly Adani green is missing…which already in to solar/wind …though recently it has declared foray in to Green hydrogen…
Tata Power perhaps is yet to give a road map for Green hydrogen… though they are focusing in to solar /wind power.
The other two articles are interesting ones you should not miss if you are interested to know more about Green hydrogen and the latest update on Green hydrogen initiative at international level by IEA as of 2021 (the last article)
Discl: This is not an investment advice. This is purely for education and information purpose