2017 Fiscal Year Final Research Report
Improvement of metal salt for selective ammonia absorption material in the moisture-ammonia mixed gas: determination of crystal structure of ammine complex
| Project/Area Number |
16K14058
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| Research Category |
Grant-in-Aid for Challenging Exploratory Research
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| Allocation Type | Multi-year Fund |
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| Research Field |
Energy-related chemistry
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| Research Institution | University of the Ryukyus |
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Principal Investigator |
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| Research Collaborator |
SHIROMA Masaaki 琉球大学, 大学院理工学研究科, 大学院生
KAWAKAMI Junko 琉球大学, 理学部
NOZATO Ami 琉球大学, 理学部
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| Project Period (FY) |
2016-04-01 – 2018-03-31
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| Keywords | アンミン錯体 / 結晶構造 / X線回折測定 / リサイクル |
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| Outline of Final Research Achievements |
copper sulfate, as a model compound of NH3 absorbent was investigated in order to (1) synthesize Cu(NH3)n(H2O)5-nSO4 and determine these crystal structure and (2) clarify the relationship between its gas absorption properties (especially absorption pressure) and products. Although single phase of NH3/H2O-mixed complex could not be obtain due to difficulty of synthesis method or degradation, anhydrous ammine complex for n＝1, 2, 4, and 5 could be synthesized with almost single phase and space group of n = 4 was determined as P1. Results of NH3-PCT measurement indicate that Cu(NH3)3SO4 does not exist. Enthalpy changes of the anhydrous complex with 2-4 eq. and 4-5 eq. NH3 were determined as -59 and -56.12 kJ/mol NH3.
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| Free Research Field |
水素貯蔵材料
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