Development of High Temperature-Pressure Type Thermogravimetric Analyzer

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It is highly expected that the advances in the reaction engineering and reaction processes under high temperature-pressure will bring about breakthrough technologies in the fields of energy utilization, environmental protection, special material development, etc. In order to carry out research works in these several conditions, one of the most indispensable and effective apparatus is a thermogravimetric analyzer TG which can operate under such high temperature and pressure conditions with high accuracy. The objective of this research work is to study and develop such a high temperature-pressure thermogravimetric analyzer(HTP-TG apparatus). A HTP-TG apparatus has been designed and fabricated in 1995 and its operation performance was evaluated together with the date obtained from atmospheric TG and calorimetric adsorption apparatus for the adsorption/desorption of adsorbents such as zeolite/CO_2, activated carbon/CO_2, systems and the carbonation/decarbonation of the CaO/CO_2/CaCO_3 system under temperatures and pressures up to 1473 K and 10 atm. In 1996, the HTP-TG apparatus was evaluated under the same temperature and pressure condition as above for CaO/H_2O/Ca(OH)_2, CaO/SO_2/CaSO_4, CaO/HCl/CaCl_2、systemwhich involve corrosive and condensable materials. As a result, the HTP-TG apparatus is found to be applicable for studying solid-gas reaction and adsorption/desorption under high temperature and pressure conditions. It can be concluded that this research work has made a contribution in the development of the advanced high temperature pressure TG analyzed by setting up the basic fundamental standards required.