流动-差热吸附量热系统 Ⅰ. 装置考察与氢型丝光沸石(HM)-苯体系吸附热的测定

本文介绍了一种差热分析(DTA)与色谱联用的吸附量热系统。经特别设计的柱恒温箱把差热与色谱结合起来, 达到了吸附量热所要求的高灵敏度与低噪声。配置了可变宽度的矩形脉冲进样系统。进样与响应的同步性良好。结合 HM-苯体系吸附热的测定, 给出了量热图谱的解析方法。得出了与文献中吸附微量热计接近的结果。利用本系统还可获得吸附平衡的信息。结果表明, 量热与吸附平衡实验数据之间具有良好的一致性。本系统适用于在接近工业反应的动态条件下研究催化剂的吸附性能。

FLOW-DTA ADSORPTIVE CALORIMETRIC SYSTEM Ⅰ. THE APPARATUS AND PROCEDURE FOR THE DETERMINATION OF THE ADSORPTION HEATS OF BENZENE ON HM

A Flow-DTA adsorptive calorimetric system constructed by the combination of Differential Thermal Analysis (DTA) and Gas Chromatograph is described in this paper. Through the column thermotank designed specially the DTA cell and the Katharometer are combined. A system for the inputting of sample taking the form of a rectangular pulse is assembled. The higher sensitivity and lower noise level and synchronism of DTA and Katharometer response make it possible to determine the heat effects in various adsorption processes. The reliability of this method has been verified by the fact that the results obtained in this paper are consistent with those determined by the adsorption microcalorimeter and the fact that the experimental data of adsorption equilibrium and of calorimetric adsorption heat are in agreement with each other. The system is available to investigate the adsorption and catalysis in the conditions which are approximate to those in the industrial reactions.