Preparation, coating and patterning of Cu-based catalysts for methanol steam reforming by micro fuel reformer

Taegyu Kim, Dae Hoon Lee, Cheonho Yoon, Dae Eun Park, Sejin Kwon, Euisik Yoon

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Citations (Scopus)

Abstract

Recent increase in need for a portable power source drives research on micro fuel cell and micro fuel reformer as a key component of micro power generation system. Various concept of reforming system is proposed and has been studied. As an attempt to develop wafer based micro reforming system, preparation, coating, and patterning of Cu-based catalysts for methanol steam reforming for micro fuel reformer are presented. Preliminary step to develop MEMS based micro fuel reformer is carried. As a first step, Cu-based catalyste are prepared by co-precipitation method. The effect of precipitation condition on physical characteristics and catalytic activity of the catalyst such as particle size, conversion rate and quality of coating on substrate are reported. And then coating processes of prepared catalysts on glass and silicon wafer are developed. A uniform and robust catalyst layer is obtained. The amount of coated catalyst on unit area of wafer is measured to be 5-8 mg/cm2, and the thickness of catalyst layer is about 50μm. By multiple coating processes, catalyst thickness can be controlled and up to 15mg/cm2 is obtained that has good reactivity. After then, patterning of coated catalyst layer is reported. Deposited catalyst layer is patterned by way of lift-off process of PVA (Poly-Vinyl Alcohol), organic sacrificial layer, by heating the substrate instead of etching a sacrificial layer. With the results aforementioned on catalyst preparation, coating, and patterning, a prototype micro catalytic reactor for micro fuel reformer is fabricated with MEMS technology. The fabrication process includes wet anisotropic etching of photosensitive glass wafer, coating/patterning of catalyst and bonding of layers. Next step that is challenging part of development of micro reformer is to find a way to overcome the effect of heat loss that lowers the conversion rate of reforming process and to achieve fast kinetics for reduction of the device scale. We are pursuing further optimization of structural design to improve conversion efficiency and to obtain fast kinetics.

Original languageEnglish
Title of host publicationProceedings of the 3rd International Conference on Fuel Cell Science, Engineering, and Technology, 2005
EditorsR.K. Shah, E.U. Ubong, S.S. Samuelsen
Pages531-536
Number of pages6
Publication statusPublished - 2005 Nov 21
Event3rd International Conference on Fuel Cell Science, Engineering, and Technology, 2005 - Ypsilanti, MI, United States
Duration: 2005 May 232005 May 25

Publication series

NameProceedings of the 3rd International Conference on Fuel Cell Science, Engineering, and Technology, 2005

Other

Other3rd International Conference on Fuel Cell Science, Engineering, and Technology, 2005
CountryUnited States
CityYpsilanti, MI
Period05/5/2305/5/25

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All Science Journal Classification (ASJC) codes

  • Engineering(all)

Cite this

Kim, T., Lee, D. H., Yoon, C., Park, D. E., Kwon, S., & Yoon, E. (2005). Preparation, coating and patterning of Cu-based catalysts for methanol steam reforming by micro fuel reformer. In R. K. Shah, E. U. Ubong, & S. S. Samuelsen (Eds.), Proceedings of the 3rd International Conference on Fuel Cell Science, Engineering, and Technology, 2005 (pp. 531-536). [FUELCELL2005-74057] (Proceedings of the 3rd International Conference on Fuel Cell Science, Engineering, and Technology, 2005).