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
3. Results and Discussion
3.1 Morphologies and structure(SEM)
Fig. 1 (a)shows SEM image of as-obtained ZnO nanowires of in the first step ranging from 80 to 400 nm in diameters and about 4 mm in length. Gold particles at the tips of the nanowires can be seen in Fig. 1(a). This indicates that the ZnO nanowire growth was governed by a VLS process. Fig. 1(a) shows ZnO nanowires obtained under th
Ge is an indirect band gap semiconductor with smaller energy difference between indirect gap and direct gap, and smaller effective masses for electron and hole pairs.
Small ionic radius difference between Ge ion and Zn ion.
These characteristics lead to the expectation that it is much easier to change the electronic structure around the band edge.
- The effects of doping and substrat
2. Experimental
The films were deposited in a conventional horizontal furnace on Si(1 1 1) substrates. SnO2 (99.99%) (Mol10:2) and ZnO/Ge slices (99.999%, purity), (Mol 10:2) powders were used as the source materials for growth of the Sn- and Ge-doped ZnO films, respectively. The ZnO/SnO2 powder was placed on an alumina boat and inserted into a horizontal tube furnace, in order to serve as th
and Hydrogen fueled cars would be alternatives for current cars.
3) Hybrid cars
Compared to Gasoline-Diesel cars, superiority of hybrid cars appears apparent. Gasoline-Diesel’s 18~23% of average efficiency energy means that most energy is lost with heat loss. Additionally, in case of driving in low speed, the fuel efficiency is very low. On the other hand, enhanced energy efficiency through
and engine to generate enough power.
Clean Diesel
The diesel car has been recognized as the main culprit of air pollution, but people are beginning to understand the diesel car in a different way. The clean diesel engine has a mechanism of compressed air and blast, and it enables the engine to generate the same power as gasoline engine with 30-40% less fuel. It is recognized as an environm
fuel.
3. History with important past events, current trends, current strategies and future of your selected two companies.
●Past event
① Delta Air Lines, Inc. is one of the largest and most successful air carriers in the United States. Originally founded as a crop dusting service in 1924, Delta was led for 40 years by an agricultural scientist and pilot named Colle
and higher, and the coal fuel causes a lot of environmental problems like greenhouse effect, ozone depletion. So the government start to regulate the activity that be able to affect the environment.
With inside view, the change of consumer is the reason. Now, consumer thinks the environment more important than in the past. They realized the importance of environmental and healthy community. The
SONY, TOSHIBA 등에서 괄목할만한 연구 성과를 보여주고 있으며,
국내에서는 4~5년 전부터 DMFC에 대한 관심이 증대되어 왔으며 삼성종합기술원, LG화학, SK등과 같은 기업과 KIST, 에너지기술연구원 등 연구소, 그리고 여러 대학에서 DMFC 관련 연구를 수행 중이며 수준 또한 선진국과 경쟁할 수 있는 수준임.
화학공학 산업에 알아보면서 본인의 부족한 한문 실력으로 영문과 국문을 중심으로 자료를 수집했고, 삼국지와 같은 중국 소설로 인해 단지 중국에로의 막연한 선망을 가졌을 뿐 지식이 턱없이 부족함에 또 한번 아쉬움에 입을 다물 수밖에 없었다.
이러한 아쉬움들을 뒤로 하고 이제 이 자료를 토대