Excess heat evolution from nanocomposite samples under exposure to hydrogen isotope gases

Akira Kitamura; Akito Takahashi; Koh Takahashi; Reiko Seto; Takeshi Hatano; Yasuhiro Iwamura; Takehiko Itoh; Jirohta Kasagi; Masanori Nakamura; Masanobu Uchimura; Hidekazu Takahashi; Shunsuke Sumitomo; Tatsumi Hioki; Tomoyoshi Motohiro; Yuichi Furuyama; Masahiro Kishida; Hideki Matsune

doi:10.1016/j.ijhydene.2018.06.187

Excess heat evolution from nanocomposite samples under exposure to hydrogen isotope gases

Akira Kitamura, Akito Takahashi, Koh Takahashi, Reiko Seto, Takeshi Hatano, Yasuhiro Iwamura, Takehiko Itoh, Jirohta Kasagi, Masanori Nakamura, Masanobu Uchimura, Hidekazu Takahashi, Shunsuke Sumitomo, Tatsumi Hioki, Tomoyoshi Motohiro, Yuichi Furuyama, Masahiro Kishida, Hideki Matsune

Molecular and Biochemical Systems Engineering

Research output: Contribution to journal › Article › peer-review

15 Citations (Scopus)

Abstract

Anomalous heat effect by interaction of hydrogen isotope gas and metal nanocomposites supported by zirconia or by silica has been examined. Observed absorption and heat evolution at RT were not too large to be explained by some chemical processes. At elevated temperatures of 200–300 °C, most samples with binary metal nanocomposites produced excess power of 3–24 W lasting for up to several weeks. The excess power was observed not only in the D-Pd·Ni system but also in the H–Pd·Ni system and H–Cu·Ni system, while single-element nanoparticle samples produced no excess power. The Pd/Ni ratio is one of the keys to increase the excess power. The maximum phase-averaged excess heat energy exceeded 270 keV/D, and the integrated excess heat energy reached 100 MJ/mol-M or 90 MJ/mol-H. It is impossible to attribute the excess heat energy to any chemical reaction; it is possibly due to radiation-free nuclear process.

Original language	English
Pages (from-to)	16187-16200
Number of pages	14
Journal	International Journal of Hydrogen Energy
Volume	43
Issue number	33
DOIs	https://doi.org/10.1016/j.ijhydene.2018.06.187
Publication status	Published - Aug 16 2018

All Science Journal Classification (ASJC) codes

Renewable Energy, Sustainability and the Environment
Fuel Technology
Condensed Matter Physics
Energy Engineering and Power Technology

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1016/j.ijhydene.2018.06.187

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Kitamura, A., Takahashi, A., Takahashi, K., Seto, R., Hatano, T., Iwamura, Y., Itoh, T., Kasagi, J., Nakamura, M., Uchimura, M., Takahashi, H., Sumitomo, S., Hioki, T., Motohiro, T., Furuyama, Y., Kishida, M., & Matsune, H. (2018). Excess heat evolution from nanocomposite samples under exposure to hydrogen isotope gases. International Journal of Hydrogen Energy, 43(33), 16187-16200. https://doi.org/10.1016/j.ijhydene.2018.06.187

Kitamura, A, Takahashi, A, Takahashi, K, Seto, R, Hatano, T, Iwamura, Y, Itoh, T, Kasagi, J, Nakamura, M, Uchimura, M, Takahashi, H, Sumitomo, S, Hioki, T, Motohiro, T, Furuyama, Y, Kishida, M & Matsune, H 2018, 'Excess heat evolution from nanocomposite samples under exposure to hydrogen isotope gases', International Journal of Hydrogen Energy, vol. 43, no. 33, pp. 16187-16200. https://doi.org/10.1016/j.ijhydene.2018.06.187

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abstract = "Anomalous heat effect by interaction of hydrogen isotope gas and metal nanocomposites supported by zirconia or by silica has been examined. Observed absorption and heat evolution at RT were not too large to be explained by some chemical processes. At elevated temperatures of 200–300 °C, most samples with binary metal nanocomposites produced excess power of 3–24 W lasting for up to several weeks. The excess power was observed not only in the D-Pd·Ni system but also in the H–Pd·Ni system and H–Cu·Ni system, while single-element nanoparticle samples produced no excess power. The Pd/Ni ratio is one of the keys to increase the excess power. The maximum phase-averaged excess heat energy exceeded 270 keV/D, and the integrated excess heat energy reached 100 MJ/mol-M or 90 MJ/mol-H. It is impossible to attribute the excess heat energy to any chemical reaction; it is possibly due to radiation-free nuclear process.",

author = "Akira Kitamura and Akito Takahashi and Koh Takahashi and Reiko Seto and Takeshi Hatano and Yasuhiro Iwamura and Takehiko Itoh and Jirohta Kasagi and Masanori Nakamura and Masanobu Uchimura and Hidekazu Takahashi and Shunsuke Sumitomo and Tatsumi Hioki and Tomoyoshi Motohiro and Yuichi Furuyama and Masahiro Kishida and Hideki Matsune",

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AU - Iwamura, Yasuhiro

AU - Itoh, Takehiko

AU - Kasagi, Jirohta

AU - Nakamura, Masanori

AU - Uchimura, Masanobu

AU - Takahashi, Hidekazu

AU - Sumitomo, Shunsuke

AU - Hioki, Tatsumi

AU - Motohiro, Tomoyoshi

AU - Furuyama, Yuichi

AU - Kishida, Masahiro

AU - Matsune, Hideki

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N2 - Anomalous heat effect by interaction of hydrogen isotope gas and metal nanocomposites supported by zirconia or by silica has been examined. Observed absorption and heat evolution at RT were not too large to be explained by some chemical processes. At elevated temperatures of 200–300 °C, most samples with binary metal nanocomposites produced excess power of 3–24 W lasting for up to several weeks. The excess power was observed not only in the D-Pd·Ni system but also in the H–Pd·Ni system and H–Cu·Ni system, while single-element nanoparticle samples produced no excess power. The Pd/Ni ratio is one of the keys to increase the excess power. The maximum phase-averaged excess heat energy exceeded 270 keV/D, and the integrated excess heat energy reached 100 MJ/mol-M or 90 MJ/mol-H. It is impossible to attribute the excess heat energy to any chemical reaction; it is possibly due to radiation-free nuclear process.

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Excess heat evolution from nanocomposite samples under exposure to hydrogen isotope gases

Abstract

All Science Journal Classification (ASJC) codes

UN SDGs

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