Development of High Temperature-Pressure Type Thermogravimetric Analyzer

高温高压下反应工程和反应过程的进展有望在能源利用、环境保护、特种材料开发等领域带来突破性技术，为了在这几个条件下开展研究工作，最不可缺少和最有效的设备之一是热重分析仪TG，其可以在这样的高温和高压条件下以高精度操作。本研究工作的目的就是研究和开发这样一种高温高压热重分析仪（HTP-TG装置）。1995年设计并制造了HTP-TG装置，在1473 K和10atm的温度和压力下，对沸石/CO_2、活性炭/CO_2等吸附剂体系的吸附/脱附和CaO/CO_2/CaCO_3体系的碳酸化/脱碳进行了常压TG和量热吸附实验。1996年，在同样的温度和压力条件下，对CaO/H_2O/Ca（OH）_2、CaO/SO_2/CaSO_4、CaO/HCl/CaCl_2等含有腐蚀性和冷凝性物质的体系进行了HTP-TG装置的评价。结果表明，HTP-TG装置适用于研究高温高压条件下的固-气反应和吸附/脱附。可以得出结论，这项研究工作作出了贡献，在发展先进的高温压力TG分析，建立所需的基本的基础标准。

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.