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Kyoto University

Paper

Carbon-Free H2 Production from NH3 Triggered at Ambient Temperature with Oxide Supported Ru Catalysts

Hydrogen produced from renewable energy has received a lot of attentions as a clean energy and development of a hydrogen storage and transportation system using hydrogen carrier has been greatly demanded. Among different kinds of hydrogen carrier, NH3 is regarded as one of the promising candidates, due to high energy density, high hydrogen capacity, and ease of liquification at room temperature. Furthermore, a carbon-free hydrogen storage and transportation system could be realized by using NH3 as hydrogen carrier. In this system, hydrogen produced from NH3 is used in engines, fuel cells, and turbines. However, use of NH3 as a hydrogen…

Paper

Ammonia Decomposition and Separation Using Catalytic Membrane Reactors

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…

Paper

Activation By High Temperature Reduction of Ru Catalyst Supported on Rare Earth Oxide for Ammonia Synthesis

Ammonia is an important chemical feedstock, and more than 80% of the synthesized ammonia is used to produce fertilizer. Ammonia is also being considered as an energy carrier and hydrogen source (1) because it has a high energy density (12.8 GJ m-3) and a high hydrogen content (17.6 wt%), (2) because infrastructure for ammonia storage and transportation is already established, and (3) because carbon dioxide is not emitted when ammonia is decomposed to produce hydrogen. If ammonia could be efficiently produced from a renewable energy source, such as solar or wind energy, problems related to the global energy crisis could…

Article

Direct Ammonia Fuel Cells Take Another Step Forward in Japan

Japanese manufacturing concern IHI reported on May 16 that it had “successfully generated 1 kW class power” from a direct ammonia solid oxide fuel cell.  This is the latest milestone for a technology that could play a major role in the roll-out  of Japan’s Hydrogen Society.

Article

SIP “Energy Carriers” video: ammonia turbines, industrial furnaces, fuel cells

To demonstrate the progress of the SIP "Energy Carriers" program, the Japan Science and Technology Agency last week released a video, embedded below, that shows three of its ammonia fuel research and development projects in operation. R&D is often an abstract idea: this video shows what it looks like to generate power from ammonia. As it turns out, fuel cells aren't hugely photogenic. Nonetheless, if a picture is worth a thousand words, this will be a long article.

Article

Development of Direct Ammonia Fuel Cells

In the last 12 months ... Researchers from three continents have pushed the boundaries for direct ammonia fuel cells, setting records in power generation and continuous operation.

Article

Green Ammonia Consortium: Bright Prospects in Japan for Ammonia as an Energy Carrier

In the last 12 months ... In July 2017, 19 companies and three research institutions came together to form the Green Ammonia Consortium. Before this development, it was unclear whether ammonia would find a significant role in Japan’s hydrogen economy. In the wake of this announcement, however, ammonia seems to have claimed the leading position in the race among potential energy carriers.

Paper

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

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…

Article

Major Development for Ammonia Energy in Japan

On July 25, the Japan Science and Technology Agency (JST) announced that a collection of companies and research institutions had come together to form a Green Ammonia Consortium.  The 22-member group will take over responsibility for the ammonia aspect of the Cross-Ministerial Strategic Innovation Program (SIP) Energy Carriers agenda when the SIP is discontinued at the end of fiscal 2018.  A JST press release states that the Consortium intends to develop a strategy for “forming [an] ammonia value chain,” promote demonstration projects that can further commercialization, and enable “Japanese industry to lead the world market.”

Article

Ammonia-Fueled Solid Oxide Fuel Cell Advance at Kyoto University

Earlier this month the Eguchi Laboratory at Kyoto University announced advances in ammonia-fueled solid oxide fuel cell technology.  The lab was able to produce a functioning fuel cell with a power output of one kilowatt.  The device attained “direct current power generation efficiency” in excess of 50% and reached 1,000 hours of continuous operation.

Paper

Research and Development of Ammonia-fueled SOFC Systems

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…

Article

Direct Ammonia Fuel Cells Take Another Step Forward in Japan

Japanese manufacturing concern IHI reported on May 16 that it had “successfully generated 1 kW class power” from a direct ammonia solid oxide fuel cell.  This is the latest milestone for a technology that could play a major role in the roll-out  of Japan’s Hydrogen Society.

Article

SIP “Energy Carriers” video: ammonia turbines, industrial furnaces, fuel cells

To demonstrate the progress of the SIP "Energy Carriers" program, the Japan Science and Technology Agency last week released a video, embedded below, that shows three of its ammonia fuel research and development projects in operation. R&D is often an abstract idea: this video shows what it looks like to generate power from ammonia. As it turns out, fuel cells aren't hugely photogenic. Nonetheless, if a picture is worth a thousand words, this will be a long article.

Article

Development of Direct Ammonia Fuel Cells

In the last 12 months ... Researchers from three continents have pushed the boundaries for direct ammonia fuel cells, setting records in power generation and continuous operation.

Article

Green Ammonia Consortium: Bright Prospects in Japan for Ammonia as an Energy Carrier

In the last 12 months ... In July 2017, 19 companies and three research institutions came together to form the Green Ammonia Consortium. Before this development, it was unclear whether ammonia would find a significant role in Japan’s hydrogen economy. In the wake of this announcement, however, ammonia seems to have claimed the leading position in the race among potential energy carriers.

Article

Major Development for Ammonia Energy in Japan

On July 25, the Japan Science and Technology Agency (JST) announced that a collection of companies and research institutions had come together to form a Green Ammonia Consortium.  The 22-member group will take over responsibility for the ammonia aspect of the Cross-Ministerial Strategic Innovation Program (SIP) Energy Carriers agenda when the SIP is discontinued at the end of fiscal 2018.  A JST press release states that the Consortium intends to develop a strategy for “forming [an] ammonia value chain,” promote demonstration projects that can further commercialization, and enable “Japanese industry to lead the world market.”

Article

Ammonia-Fueled Solid Oxide Fuel Cell Advance at Kyoto University

Earlier this month the Eguchi Laboratory at Kyoto University announced advances in ammonia-fueled solid oxide fuel cell technology.  The lab was able to produce a functioning fuel cell with a power output of one kilowatt.  The device attained “direct current power generation efficiency” in excess of 50% and reached 1,000 hours of continuous operation.

Paper

Carbon-Free H2 Production from NH3 Triggered at Ambient Temperature with Oxide Supported Ru Catalysts

Hydrogen produced from renewable energy has received a lot of attentions as a clean energy and development of a hydrogen storage and transportation system using hydrogen carrier has been greatly demanded. Among different kinds of hydrogen carrier, NH3 is regarded as one of the promising candidates, due to high energy density, high hydrogen capacity, and ease of liquification at room temperature. Furthermore, a carbon-free hydrogen storage and transportation system could be realized by using NH3 as hydrogen carrier. In this system, hydrogen produced from NH3 is used in engines, fuel cells, and turbines. However, use of NH3 as a hydrogen…

Paper

Ammonia Decomposition and Separation Using Catalytic Membrane Reactors

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…

Paper

Activation By High Temperature Reduction of Ru Catalyst Supported on Rare Earth Oxide for Ammonia Synthesis

Ammonia is an important chemical feedstock, and more than 80% of the synthesized ammonia is used to produce fertilizer. Ammonia is also being considered as an energy carrier and hydrogen source (1) because it has a high energy density (12.8 GJ m-3) and a high hydrogen content (17.6 wt%), (2) because infrastructure for ammonia storage and transportation is already established, and (3) because carbon dioxide is not emitted when ammonia is decomposed to produce hydrogen. If ammonia could be efficiently produced from a renewable energy source, such as solar or wind energy, problems related to the global energy crisis could…

Paper

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

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…

Paper

Research and Development of Ammonia-fueled SOFC Systems

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…