Experiment Condition
95% N2: 5% H2 gas mix 99.995% using pure gases
Equipped with a Pd catalyst at 20~25oC
Solutions were purged with O2-free N2
and stored in the chamber for least 5 days.
0.25M Fe(Ⅱ) and other samples were prepared inside the chamber and using material for at least 5 days .
Stock Fe(Ⅱ) solutions were stored at pH<1.0 in amber containers wrapped with aluminum foil
ㆍTemperature : 20~25℃
ㆍConduct : 97% N2 : 3% H2 mix using 99.995% pure gases
ㆍ Solutions were purged with O2-free N2 that stored in the chamber
for 5 days
ㆍ Stock solution of 0.250M Fe(Ⅱ) wrapped with aluminum foil.(
회화방법에는 건식법(Dry ashing)과 습식법(Wet ashing)이 있는데 건식법은 조작이 간단하다는 장점이 있지만 무기물의 일부가 휘발되는 단점이 있다. 건식법에는 직접 회화법과 초산마그네슘 첨가 신속회화법, Low-temperature plasma ashing의 3가지 방법이 있다. 우선 직접회화법은 시료를 도가니에 넣고 전기로에
the high temperature fluids in the vicinity of the heated plate and introduce the low-temperature ambient fluids into the region behind the promoters.
The optimum height and the attack angle that make the overall heat transfer coefficients a maximum were determined for the present promoters and they are H=10mm and α=90 degrees, respectively, within the range of the present experiments.