WEBVTT

1
00:00:00.658 --> 00:00:02.658
What is hydrogen?

2
00:00:05.216 --> 00:00:07.774
Hydrogen is an energy vector: in nature it is found only

3
00:00:07.774 --> 00:00:09.774
bound to other elements and a source of energy is needed to separate it.

4
00:00:10.653 --> 00:00:12.009
Depending on the production method,

5
00:00:12.009 --> 00:00:14.009
hydrogen can have different origins

6
00:00:14.009 --> 00:00:16.009
and different environmental impacts, associated with different colors.

7
00:00:16.009 --> 00:00:18.804
The final product is always the same.

8
00:00:22.269 --> 00:00:23.192
The colors of hydrogen

9
00:00:23.192 --> 00:00:25.778
Brown: obtained from coal gasification.

10
00:00:25.778 --> 00:00:28.884
More than 20 kg of CO2 are emitted for every kg of hydrogen for its production.

11
00:00:32.960 --> 00:00:36.901
Grey: obtained from the steam reforming of natural gas.

12
00:00:36.901 --> 00:00:40.892
More than 9 kg of CO2 are emitted for every kg of hydrogen for its production.

13
00:00:43.736 --> 00:00:48.628
Blue: obtained with the same production method of grey hydrogen

14
00:00:48.628 --> 00:00:51.292
but with a partial capture, transport and storage of CO2.

15
00:00:51.292 --> 00:00:53.766
It generates more than 9 kg of CO2 for every kg of hydrogen produced

16
00:00:53.766 --> 00:00:58.105
and emits up to 5 kg of CO2 not captured for every kg of hydrogen.

17
00:01:03.205 --> 00:01:08.305
Pink: obtained from the electrolysis of water powered by nuclear energy.

18
00:01:08.305 --> 00:01:10.826
It has a high environmental impact due to the production of nuclear waste

19
00:01:10.826 --> 00:01:13.537
even if it does not emit CO2.

20
00:01:16.472 --> 00:01:19.407
Green: obtained from the electrolysis of water powered by renewable energy.

21
00:01:19.407 --> 00:01:22.971
It has a very low environmental impact  and generates zero CO2 emissions.

22
00:01:26.526 --> 00:01:27.422
Let's analyze its production process

23
00:01:27.422 --> 00:01:31.802
It is produced thanks to the electrolysis of water fed by renewable energy.

24
00:01:33.461 --> 00:01:33.961
What is water electrolysis?

25
00:01:33.961 --> 00:01:37.059
The process starts with the electrolyzer and consists of the decomposition of water into hydrogen and gaseous oxygen

26
00:01:37.059 --> 00:01:38.365
thanks to renewable electricity.

27
00:01:38.365 --> 00:01:41.425
Downstream, the hydrogen produced can be stored.

28
00:01:49.009 --> 00:01:49.549
Where can we use it?

29
00:01:50.386 --> 00:01:55.789
In those hard-to-abate industrial sectors that cannot be decarbonised

30
00:01:55.789 --> 00:01:58.974
with direct electrification powered by renewable energy.

31
00:02:00.688 --> 00:02:02.212
Main applications are:

32
00:02:02.212 --> 00:02:07.262
as raw material, replacing grey hydrogen in the chemical industry and oil refinery

33
00:02:09.774 --> 00:02:14.308
in industries where high temperature heat is needed such as cement, steel, glass

34
00:02:14.308 --> 00:02:16.040
to replace the fossil fuels used today

35
00:02:21.083 --> 00:02:21.623
What are the benefits of green hydrogen?

36
00:02:22.713 --> 00:02:23.213
zero CO2 emissions

37
00:02:26.768 --> 00:02:29.621


38
00:02:30.475 --> 00:02:33.225
plant configuration is simple
plant structure supports a decentralized and more flexible model

39
00:02:36.466 --> 00:02:41.566
the plant has no impact on health, safety or the environment

40
00:02:44.647 --> 00:02:50.000
For a more sustainable future, Enel Green Power has chosen Green Hydrogen, as a complement to electrification, for full decarbonisation including hard-to-abate sectors.