[논문]Development of High Performance WGS Catalyst for Fuel Processor Applications

Lee, Yoon-Ju; Ryu, Jong-Woo; Kim, Dae-Hyun; Choi, Eun-Hyung; Noh, Won-Suck; Lee, Sang-Deuk; Moon, Dong-Ju

Development of High Performance WGS Catalyst for Fuel Processor Applications
연료 개질기용 고성능 수성가스 전환반응 촉매 개발 원문보기

Lee, Yoon-Ju (한국과학기술연구원) , Ryu, Jong-Woo (한국과학기술연구원) , Kim, Dae-Hyun (한국과학기술연구원) , Choi, Eun-Hyung (한국과학기술연구원) , Noh, Won-Suck (한국과학기술연구원) , Lee, Sang-Deuk (한국과학기술연구원) , Moon, Dong-Ju (한국과학기술연구원)

WGS reaction over Mo2C and ceria based catalysts was investigated to develop an alternative commercial Cu-Zn/Al2O3 catalyst for fuel processor and hydrogen station. The Mo2C catalysts were prepared by a temperature programmed method and the various metal supported cerium oxide catalysts were prepared by an Impregnation method. The catalysts were characterized by the N2 physisorption, Co chemisorption, XRD, TEM and TPR. It was found that Mo2C and 0.2wt% Pt-40wt%, Ni/CeO2 catalysts had higher activity and stability than the Cu-Zn/Al203 above $260^{\circ}C$. Moreover, CO conversion of more than 85% was observed at $280{\sim}300^{\circ}C$. But all catalysts were deactivated during the thermal cycling runs. The results suggest that these catalysts are an attractive candidate for the alternative Cu-Zn/Al2O3 catalyst for fuel processor and hydrogen station applications.

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제안 방법

In this work, the WGS reaction over Mo2C and various Pt-Ni based catalysts with different metal loading was investigated to develop a high performance LTS catalyst for fuel processor and hydrogen station applications. The catalytic performances for thermal cycling runs over the prepared catalysts were compared with those over the commercial Cu-Zn/AbOa catalyst.

대상 데이터

, M930). The LTS reactor made up of Inconel 600 tube (0.0075 m I.D. and 0.20 m length) was used in this study. The reaction temperature was controlled by a PID temperature controller and was monitored by a separated thermocouple placed in the catalyst bed.
, M30]. The WGS reactor consists of four sections: feed supply, preheater, WGS reactor and GC anolysis sections. The gaseous reactants were delivered by mass flow controllers (BRONKHORST HI-TEC Co.
The Pt-Ni/CeOz catalysts were reduced at 400 °Cfor 2 h in a mixture of 40 cc/min of 5% Hz in Ar balance. The reactant gas consisted of 62.5% H₂ (99.999%), 31.8% deionized H₂O and 5.7% CO (99.999%).

성능/효과

Therefore, the thermal cycling stability is very important for application in the on-board fuel cell vehicles, fuel processor and/or hydrogen station in which the system is repeatedly turned on and off. In this work, it was found that Pt-Ni/CeOi and Mo2C catalysts showed higher catalytic stability for thermal cycling run than Cu-Zn/AEOgatalyst.
It was found that the particle size of Ni after the reaction was increased compared to those of the fresh catalyst. It was concluded that the deactivation of Pt-Ni/CeOzcatalyst during the thermal cycling run for WGS reaction was caused by the sintering of Ni particles. 까le results suggest that Pt-Ni/CeOi catalyst is an attractive candidate with high thermal stability for water gas shift reaction and more stable than commercial LTS catalyst even though all catalysts are slowly deactivated during the thermal cycling run.
in Table 1. It was found that the BET surface areas of M02C catalysts were similar to that of Cu-Zn/AhOa catalyst within an experimental error while active metal surface area ofMozC was higher than that of Cu-Zn/AhOs catalyst. The surface area of Pt-Ni/CeO₂ catalyst showed high surface area over the commercial LTS catalyst.

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Development of High Performance WGS Catalyst for Fuel Processor Applications
연료 개질기용 고성능 수성가스 전환반응 촉매 개발 원문보기

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Development of High Performance WGS Catalyst for Fuel Processor Applications 연료 개질기용 고성능 수성가스 전환반응 촉매 개발 원문보기

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Development of High Performance WGS Catalyst for Fuel Processor Applications
연료 개질기용 고성능 수성가스 전환반응 촉매 개발 원문보기

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