https://www.bbc.com/news/av/science-environment-59092240
Why this element could help tackle climate change
The BBC’s Roger Harrabin takes a look at the tech behind hydrogen energy and its green potential.
www.bbc.com
Hydrogen helps launch rockets into space, And lift-off. it helps power trains in Germany, and it’s been hailed as a potential clean energy source.We’re going to put a big bet on hydrogen.
What is hydrogen energy? and how could it help cut planet-heating carbon emissions?
Well, hydrogen atoms are in substances all around us from water, plants, and fossil fuels such as coal and oil.What makes hydrogen so special? It can be turned into a clean fuel for our cars, heat for our homes and power for our industries.It releases water, not troublesome carbon emissions, when it’s consumed.
Many governments, including the UK,are producing strategies to develop hydrogen.Car maker Toyota has already introduced hydrogen powered buses to Tokyo’s streets.Key industries like steel and cement are developing methods to burn hydrogen as a clean fuel.
It creates some local pollution of nitrogen oxides, but no planet-heating carbon. Water when electricity is passed through it breaks up into oxygen and hydrogen.The fuel cell reverses the process.
How do we take hydrogen from other substances? and turn it into energy for fuel cells?
That’s the key question because some ways of getting hydrogen are more environmentally friendly than others.The most used process to produce hydro
gen in the UK is grey hydrogen, where we use high-temperature steam to pull apart natural gas in order to produce carbon dioxide and hydrogen. The CO2 that is taken from the process is released to atmosphere and this is something that we are aiming to move away from.The second process Is called blue hydrogen and this follows the same method as grey hydrogen. But, the carbon dioxide is captured and is stored underground.Green hydrogen, where we use electricity to split water apart. The most important factor here is where do we get our electricity from. Now that should be from renewables in order to keep it low carbon.
What is the future for hydrogen? The use of hydrogen within our energy system, whether that is for powering our vehicles or for switching out fossil fuels in industry, will be part of our low-carbon future.Globally we’re right at the beginning of this process.
<WORDS>
*life-off:the action of a spacecraft or rocket leaving the ground
*hail:to call someone in order to attract their attention
*pass through=move through, transit
*nitrogen oxides 질소산화물
<헷갈리는 해석>
-Water when electricity is passed through it breaks up into oxygen and hydrogen.
전기가 통과할때 물은 산소와 수소로 분해된다.
-We’re going to put a big bet on hydrogen.
우리는 수소에 더 투자할 것이다.
(put a big get on something
:to invest or risk a lot of money in the belief that something will happen.)
-The fuel cell reverses the process.
그 연료전지는 과정을 뒤바꾼다.
<Summary>
수소에너지는 해로운 탄소 에너지를 배출하지 않고 물을 배출하는 연료이다.우래서 우리는 이산화탄소 배출을 감소시키기 위해 이 에너지를 적극적으로 사용해야 할 필요가 있다. 실제로 영국이나 일본에서 수소를 이용하여 교통수단,다양한 산업에 이용할 수 있는 방법들을 모색중이다.
수소는 회색과 청색,녹색의 세가지 색깔을 띄고 있는데 특히 회색 수소가 가장 많이 사용되고 있다.회색 수소는 고압에서 화석연료를 사용해 생산되는 수소이다. 하지만 아직까지 청정에너지인 수소를 생산하는데 한계성이 있다. 가장 큰 원인은 경제성이다. 수소는 석유,석탄과 달리 화합물 형태로 존재해 따로 분리과정을 거쳐야 하는 2차 에너지이기 때문이다. 또한 필연적으로 이산화탄소가 부산물로 만들어져 처리하는 환경적 비용이 많이 발생된다. 그래서 몇몇 전문가들은 " 수소에너지는 다른 재생에너지와 공생으로 해결해야 할 문제이다" 라고 말한다.
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