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Presentation

Ammonia Decomposition and Separation Using Catalytic Membrane Reactors

Sai P. Katikaneni Stephen N. Paglieri Aadesh X. Harale Aqil Jamal Koichi Eguchi Hiroki Muroyama Toshiaki Matsui

Hydrogen is the primary fuel source for fuel cells. However, the low volume density and difficulty in storing and transporting hydrogen are major obstacles for its practical utilization. Among various hydrogen carries, ammonia is one of the most promising candidates because of its high hydrogen density and boiling point and ease in liquefaction and transportation. The reaction temperature of ammonia cracking into nitrogen and hydrogen is about 500˚C or higher. The hydrogen can be effectively separated by the membrane based on Pd alloy about 500˚C. Currently, the extraction of hydrogen from ammonia is carried out by two step process involving…

Presentation

Development of Catalytic Reactors and Solid Oxide Fuel Cells Systems for Utilization of Ammonia

Koichi Eguchi Yosuke Takahashi Takahiro Matsuo Hayahide Yamasaki Hidehito Kubo Akihiro Okabe Takenori Isomura

Hydrogen is the primary fuel source for fuel cells. However, the low volume density and difficulty in storage and transportation are major obstacles for the practical utilization. Among various hydrogen carriers, ammonia is one of the promising candidates because of its high hydrogen density and boiling point and ease in liquefaction and transportation. The reaction temperature of ammonia cracking to nitrogen and hydrogen, being about 600°C or higher, is close to the operating temperature of solid oxide fuel cells (SOFCs). The integration of these two devices is beneficial in terms of heat and energy managements and will lead to the…

Presentation

Development of Materials and Systems for Ammonia-Fueled Solid Oxide Fuel Cells

Koichi Eguchi Yosuke Takahashi Hayahide Yamasaki Hidehito Kubo Akihiro Okabe Takenori Isomura Takahiro Matsuo

Hydrogen is the primary fuel source for fuel cells. However, the low volume density and difficulty in storage and transportation are major obstacles for the practical utilization. On-site generation of hydrogen from its carrier is an effective method for the fuel supply. Among various hydrogen carriers, ammonia is one of the promising candidates. Ammonia has high hydrogen density. The boiling point of ammonia is relatively high, leading to the ease in liquefaction and transportation. Hydrogen can be produced from ammonia with a mildly endothermic process. The reaction temperature of ammonia cracking is about 600˚C or higher which is close to…

Presentation

Research and Development of Ammonia-fueled SOFC Systems

Koichi Eguchi Atthapon Srifa Takeou Okanishi Hiroki Muroyama Toshiaki Matsui Masashi Kishimoto Motohiro Saito Hiroshi Iwai Hideo Yoshida Masaki Saito Takeshi Koide Hiroyuki Iwai Shinsuke Suzuki Yosuke Takahashi Toshitaka Horiuchi Hayahide Yamasaki Shohei Matsumoto Shuji Yumoto Hidehito Kubo Jun Kawahara Akihiro Okabe Yuki Kikkawa Takenori Isomura

Ammonia is a promising hydrogen carrier because of its high hydrogen density, low production cost, and ease in liquefaction and transport. Ammonia decomposes into nitrogen and hydrogen through a mildly endothermic process. The ammonia decomposition temperature is close to the operating conditions of solid oxide fuel cells (SOFCs). Therefore, the integration of these two devices is beneficial in terms of efficient heat and energy managements and will lead to the development of simplified generation systems. We have investigated three types of ammonia-fueled SOFC systems. In one system, ammonia is directly supplied to the anode chamber. Ammonia decomposes into nitrogen and…

Presentation

Current progress in development of NH3-fueled solid-state fuel cell systems

Takeou Okanishi Kaname Okura Jun Yang Hiroki Muroyama Toshiaki Matsui Masashi Kishimoto Motohiro Saito Hiroshi Iwai Hideo Yoshida Koichi Eguchi Hiroyuki Iwai K. Inaoka Shinsuke Suzuki Yosuke Takahashi Toshitaka Horiuchi Hayahide Yamasaki Hideyuki Matsumoto Hidehito Kubo Jun Kawahara Akihiro Okabe Yuki Kikkawa T. Negishi S. Watanabe

Current progress in development of NH3-fueled solid-state fuel cell systems T. Okanishi*, K. Okura, J. Yang, H. Muroyama, T. Matsui, M. Kishimoto, M. Saito, H. Iwai, H. Yoshida, K. Eguchi, Kyoto University; H. Iwai, K. Inaoka, S. Suzuki, Y. Takahashi, Noritake; T. Horiuchi, H. Yamasaki, Nippon Shokubai; S. Matsumoto, H. Kubo, Toyota Industries; J. Kawahara, A. Okabe, Mitsui Chemical; Y. Kikkawa, T. Negishi, S. Watanabe, Tokuyama

Presentation

Research and development of NH3-fueled solid-state fuel cell systems

Hiroki Muroyama Jun Yang Kaname Okura Takeou Okanishi Toshiaki Matsui Motohiro Saito Hiroshi Iwai Hideo Yoshida Koichi Eguchi

Ammonia is a prospective carbon-free fuel source for fuel cell systems due to low production cost, ease in liquefaction at ambient temperatures, and high energy density. Furthermore, hydrogen and nitrogen originating from ammonia fuel are expected to have little negative effect on fuel cell performance, while hydrocarbon fuels draws some severe problems at electrodes, such as CO poisoning or carbon deposition in low- and high-temperature fuel cells, respectively. Several technologies can be considered for the ammonia utilization in fuel cell systems. For the utilization of ammonia fuel, we aim to develop a system combined with ammonia decomposition reactor and solid-state…