Vol.9 No.3 2017

Research paper : Development of HASClay® as a high-performance adsorption material (M. Suzuki et al.)−163−Synthesiology - English edition Vol.9 No.3 (2017) gas and the CO2 storage layer as well as the construction of the NOx and SOx removal device and dehumidifying systems.5 Future issuesWe discussed the development of HASClay and its application to the present, and the whole ow is shown in Fig. 14. Looking back, we feel that if we started from the sudden discovery of HASClay, it would have been difficult to set up a solid framework that we have now. We were able to achieve what we have now through the experiences with research of clay minerals, research of humidity controlling materials and nanomaterials in natural soil, and synthesis and use development of imogolite.However, HASClay has not yet made major social contribution. For HASClay to be used more widely, the issue at this point is to change it from powder to a readily usable form. The manufacture of granules is essential, and it is also necessary for the desiccant rotor to be able to meet various requirements.There are two major points that can be given for future development. As a material, it is necessary to find an adsorbent that has the same performance as HASClay GI, which was the target of the initial new material development, and that can be mass synthesized using inexpensive material at low temperature of 100 ºC or less. To increase the production volume of HASClay, it is necessary to develop a new system and build a new industry. A professor of a university said to me, “The person who developed the material knows most about that material. That’s why the person who developed the material is the most likely person to develop a good system.”We shall continue to develop materials to achieve the initial objective, and we shall also work on the design and construction of a new system to spread the use of this material.ScenarioApplication researchBasic researchGoals for expanding use in society and the present stateEorts to expand marketEorts to expand usageDevelopment of mass synthesis method for HASClayClarication of structure and function of new substance HASClaySucceeded in synthesizing new substance HASClaySet scenario for practical use (set clear goals for synthesizing new adsorbents)Attempts and limitations of practical application of natural clay minerals (allophane, imogolite)Basic research on the structure and function of natural clay mineralsFig. 14 Development of HASClay and ow up to presentReferences[1]M. Suzuki: Development of low temperature regenerated heat exchange materials in adsorptive heat energy system and present state, J. Society Inorganic Materials, Japan, 14, 383–389 (2007) (in Japanese).[2]Mitsubishi Plastics, Inc.: Zeolite kei suijoki kyuchakuzai (Zeolite water vapor adsorbent), https://www.mpi.co.jp/products/industrial_materials/im010.html, accessed 2016-03-25 (in Japanese).[3]Taiyo Kagaku Co., Ltd.: Kinzoku nanoryushi tanji mesoporous silica (metal nanoparticle supported mesoporus silica), http://taiyo-chem.com/2008/10/14/tmpsfunc, accessed 2016-03-25 (in Japanese).[4]Japan Exlan Co., Ltd.: Kinosei biryushi (Functional fine particles), http://exlan.co.jp/products/beads/index.html, accessed 2016-03-25 (in Japanese).[5]Z. Abidin, N. Matsue and T. Henmi: Dissolution mechanism of nano-ballallophane with dilute alkali solution, Clay Sci., 12 (4), 213–222 (2004).[6]AIST Today: Nanotube-jo aluminum keisan’en no konodo goseiho (High concentration synthesis method for nanotubular aluminum silicate), AIST Today, 3 (11), 36 (2003) (in Japanese).[7]Clay Science Society of Japan: Allophane and imogolite, Nendo Handbook Dai 3 Han (Handbook of Clays and Clay Minerals, Third Edition), Gihodo Shuppan, 88–92 (2009) (in Japanese).[8]M. Suzuki: Synthesis and applications of allophane and imogolite, Nendo Kagaku, 50 (2), 81–87 (2011) (in Japanese).[9]H. Fukumizu and S. Yokoyama: Study on a new humidity controlling material using porous soil “allophane”— Evaluation of humidity controlling performance in test houses, Architectural Institute of Japan Journal of Technology and Design, 10, 21–24 (2000) (in Japanese).[10]M. Suzuki, F. Ohashi, K. Inukai, M. Maeda and S. Tomura: Synthesis of allophane and imogolite from inorganic solution—Influence of co-existing ion concentration and titration rate on forming precursor, Nendo Kagaku, 40, 1–14 (2000) (in Japanese).[11]M. Suzuki, F. Ohashi, K. Inukai, M. Maeda, S. Tomura and T. Mizota: Hydration enthalphy measurement and evaluation as heat exchangers of allophane and imogolite, Nippon Ceramics Kyokai Gakujutsu Ronbunshi, 109, 681–685 (2001) (in Japanese).[12]M. Suzuki and S. Hiradate: Imogolite no gosei katei ni okeru keiso to aluminum no kagaku jotai henka (Changes in the chemical state of silicon and aluminum in the imogolite synthesis process), Proceedings of 50th Meeting of Clay Science Society of Japan, 162–163 (2006) (in Japanese).[13]M. Suzuki and M. Maeda: Nendokei muki takoshitsu zairyo ni yoru desiccant kuchoyo kyuchakuzai no kaihatsu (Development of desiccant air conditioning adsorbent using inorganic porous clay material), Transactions of the Japan Society of Refrigerating and Air Conditioning Engineers, 29 (1), 89–96 (2012) (in Japanese).[14]M. Suzuki, R Nakanishi, K. Inukai, M. Maeda, S. Hiradate and K. Tsukimura: A new amorphous aluminum-silicate: High performance adsorbent for water vapor and carbon dioxide, Trans Mat. Res. Soc. Japan, 34 (2), 367–370 (2009).[15]M. Suzuki: HAS-Clay, Desiccant Kucho System No Kiso

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