High-temperature decomposition
High-temperature splitting of water occurs at about 3000 °C. At this temperature, 10% of the water is decomposed and the remaining 90% can be recycled. To reduce the temperature, other processes for high temperature splitting of water have been suggested:
▸Thermo-chemical cycles.
▸Hybrid systems coupling thermal decomposition and electrolytic
Introduction
Fossil fuels
- Main Energy Source
- Causing global warming
- Being exhausted
→ need
alternative energy
Hydrogen is one of well-known clean energy source.
Several technologies are already available in the marketplace for the industrial production of hydrogen.
Hydrogen can be produced from a variety of feedstocks.
A variety of process technologi
Fuel Cell?
The fuel cell is a device that transforms chemical energy generated by oxidation of fuel(hydrogen, methanol, natural gas etc.) into electric energy
The reaction of hydrogen and oxygen generates electricity. It is a reversed reaction that generates hydrogen and oxygen by doing waterelectrolysis
(중략)
Polyelectrolyte fuel cell
Using a membrane with a proton conduction as an
electrolysis에 의한 redox가 일어난다. 이곳은 solution에 직접 닿는 부위라서 반응의 완전성에 크게 관여할 수 있기 때문에 solution이 바뀔 때마다 증류수와 함께 alumina 입자로 polishing하여 표면을 편평하게 갈아주는 것이 좋다. Reference electrode는 potential의 기준을 제공하기 위한 전극으로, Ag/AgCl 혹은 SCE를 많이
Water Splitting)
열화학 프로세스인 고온물분해 기술은 초기개발단계에 있으며, 장기적으로 이용이 가능한 기술로 대규모 집중생산에 가장 적합한 것으로 알려져 있다. 또한 태양을 이용한 반중앙식(semi-central)생산도 가능한 것으로 알려지고 있다. 고온열(500~2,000℃)은 화학적 상호반응을 차례로 일으키