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微量量热法研究液固吸附正逐渐引起人们的兴趣。本实验室拟开展强化采油中表面活性剂在固体表面吸附机理的研究,装配了一台微量吸附热量计,并用标准化学反应检测其可靠性。研究表面活性剂的吸附规律,需要选用合适的吸附剂。硅胶的组份简单确定,不含干扰离子,表面积足够大,而且它就是油井矿物、粘土等的主要成份,被选为吸附剂样品。但硅胶的表面状态易受制备过程、热处理等因素影响,迄今尚无统一标准的硅胶表面,使用时应表征其表面状态。本文用热失重分析确定硅胶的活化温度、用微量吸附热量计测量了硅胶的浸湿热,并与文献数据进行比较。
Micro-calorimetry liquid-solid adsorption is gradually aroused people’s interest. The laboratory intends to carry out enhanced oil surface active agent in the solid surface adsorption mechanism, equipped with a trace adsorption calorimeter, and the use of standard chemical reactions to test its reliability. Research on the adsorption of surfactants, the need to select a suitable adsorbent. The composition of the silica gel is simple, free of interfering ions, large enough in surface area, and it is the major component of well minerals, clays and the like and has been chosen as the adsorbent sample. However, the surface condition of silica gel is susceptible to the preparation process, heat treatment and other factors, so far there is no uniform standard silicone surface, the surface should be used to characterize the state. In this paper, the activation temperature of silica gel was determined by TG analysis. The soaking heat of silica gel was measured by microcalorimetry and compared with the literature data.