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Effective hydrogen by propane steam reforming over M / 30 wt % NiO / YSZ catalyst ( M = Ru , Rh , Pd , Ag )
| Content Provider | Semantic Scholar |
|---|---|
| Author | Im, Yonghwan Kang, Misook |
| Copyright Year | 2017 |
| Abstract | Hydrogen is an important energy carrier because it is eco-friendly and high energy density. The main production of hydrogen is a steam reforming from hydrocarbons [1-2]. Especially, propane is one of prospective feed gases of steam reforming because the propane is main component gas of liquefied petroleum gas (LPG) used widely in household, transport, and other uses. Moreover, propane can generate so much hydrogen per unit volume of feed gas that is used commercially. Catalysts based on Ni/Al2O3 are widely used for steam reforming process but these catalysts can be easily aggregated and deactivated due to carbon deposition. But, using yttrium stabilized zirconium (YSZ) as catalytic supporter can solve these problems because YSZ is thermally stable and expected influence of oxygen vacancies of YSZ [3]. In this study, YSZ was used as catalytic supporter in 1 wt% M/30 wt% NiO/YSZ (M= Ru, Rh, Pd, Ag) that was used for propane steam reforming (PSR) to study how YSZ affects performance of PSR. In addition, this study also tried to find out which noble metal is more appropriate to PSR to inhibit carbon deposition. As a result, in Fig. 1 (a) and (b), the performance of PSR was conducted using 1 g of 30 wt% NiO/YSZ and 1 wt% Pd/30 wt% NiO/YSZ. The reaction was done from 450 o C to 900 o C at 12000 GHSV (9 % propane in total flux) after reduction of catalyst and steam to carbon ratio (SCR) was 3. The output gases were analyzed as H2, CH4, CO, CO2 and extra feed gas, C3H8. In comparison with Fig. 1 (a) and (b), both the catalysts have H2 selectivity of about 73 % however, the 1 wt% Pd/30 wt% NiO/YSZ was more activated in lower temperature than 30 wt% NiO/YSZ according to C3H8 conversion. Likewise, the CH4 generated in 1 wt% Pd/30 wt% NiO/YSZ was as much as the CH4 generated in 30 wt% NiO/YSZ, and it indicates 1 wt% Pd/30 wt% NiO/YSZ was easily cracking C3H8 more than 30 wt% NiO/YSZ. Whereas, the extent of water gas shift reaction of 30 wt% NiO/YSZ was more active than 1 wt% Pd/30 wt% NiO/YSZ as C3H8 conversion was nearly close to 100 % above 700 o C. Because CO/CO2 ratio was higher in 1 wt% Pd/30 wt% NiO/YSZ. Consequently, loaded Pd could enhance H2 production at low temperature but it could not help water shift reaction at high temperature. In addition, I will discuss the effect of other noble metals, Ru, Rh, and Ag, which I have investigated. |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | http://www.shokubai.org/16kjsc/pdf/Youth_oral/YO_A15.pdf |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
