How to reduce carbon dioxide in the atmosphere

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How to reduce carbon dioxide in the atmosphere

１： How to fill deep underground
How to bury carbon dioxide deep underground


Chemical reaction of carbon dioxide to produce hydrogen and ethanol.
Ethanol and methanol are synthesized via formic acid.
Until a while ago, practical experiments to fill carbon dioxide deep underground
It is also actively carried out and partly put into practical use.
To fill carbon dioxide in the ground,
Problems have also been pointed out.


２： Therefore, at present, like artificial photosynthesis,
The method of making something using carbon dioxide as a raw material is better,
It is drawing attention. It is a technique called artificial photosynthesis.

Artificial photosynthesis consists of two chemical reactions.
Although it became possible to almost reproduce the light 
reaction in artificial photosynthesis,
The dark reaction has not reached the stage where it can be reproduced perfectly yet.
Nevertheless, using light energy to transfer substances with 
chemical energy
Because it is designed to be able to produce,
It can be said that it is sufficiently valuable photosynthesis.
Especially, creatures can not use hydrogen as they are,
It is possible to utilize hydrogen as an energy source,
It is enough to extract chemical energy that is sufficiently useful even in light reaction
You can say that you can do it.
上の図の反応を化学式にすると以下のようになります。

明反応：Apparent reaction
水（2H2O）+光　→　酸素（O2）＋水素イオン（4H＋）＋電子(4e–)

暗反応：dark reaction
水素イオン（2H＋）＋電子(2e–)＋二酸化炭素（CO2）　→　
ギ酸（CH2O2）

 In the figure above, in order to cause a dark reaction, 
separate electrons and hydrogen ions
I am sending it to a different place, but without causing 
a dark reaction,
(H2) can also be taken out. Hydrogen is used as
 "raw material for fuel cell"
Things are also considered, and if it becomes possible 
to produce efficiently with artificial photosynthesis,
It plays a big role in making a society centered on
hydrogen energy　It will be

 In addition, methanol that can be made by a dark reaction also becomes "fuel cell"
In addition to being usable, it can be applied as an alcohol fuel.
However, as efficiency, in February 2016, the synthesis efficiency was 4.6%
Is the highest in the world, yet the efficiency is still low.
  In the future, we want to raise the efficiency to about 20% and to put it into practical use
It seems to be thinking.
I am extracting a part of the document and using it.




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