Micro-combustion calorimetry employing a Calvet heat flux calorimeter |
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Institution: | 1. University of Salento, Department of Engineering for Innovation, Via per Monteroni, 73100 Lecce, Italy;2. Department of Mechanical Engineering, Arkansas Tech University, Russellville, AR 72801, USA;1. Research Center of laser Fusion, China Academy of Engineering Physics, Mianyang 621900, China;2. National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei 230029, China |
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Abstract: | Two micro-combustion bombs developed from a high pressure stainless steel vessel have been adapted to a Setaram C80 Calvet calorimeter. The constant of each micro-bomb was determined by combustions with benzoic acid NIST 39j, giving for the micro-combustion bomb in the measurement sensor km=(1.01112±0.00054) and for the micro-combustion bomb in the reference sensor kr=(1.00646±0.00059) which means an uncertainty of less than 0.06 per cent for calibration. The experimental methodology to get results of combustion energy of organic compounds with a precision also better than 0.06 per cent is described by applying this micro-combustion device to the measurement of the enthalpy of combustion of the succinic acid, giving ΔcH°m(cr, T=298.15 K)=?(1492.89 ± 0.77) kJ · mol?1. |
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