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以郑州市松散孔隙型热储层的细砂为研究对象,研究了岩样质量、pH值、温度、初始质量浓度等对氨氮吸附特性的影响。结果表明,研究区热储层的细砂对氨氮的吸附是一个放热的物理吸附过程,其中快速吸附占了很大比例并且能在短时间内达到吸附平衡,这与起主要吸附作用的黏粒含量较少有关。如果吸附剂已经能够提供足够的吸附位,那么土量增加反而会减少其吸附量。pH值越大,温度越低,岩样对氨氮的吸附能力越强;在一定范围内吸附量与氨氮溶液的初始质量浓度有关,初始质量浓度越高,吸附量越大。
In this paper, the fine sand of loose pore thermal reservoir in Zhengzhou City was taken as the research object to study the influence of rock mass quality, pH value, temperature and initial mass concentration on the adsorption characteristics of ammonia nitrogen. The results show that the adsorption of ammonia nitrogen by the fine sand in the thermal reservoirs in the study area is an exothermic physical adsorption process, in which rapid adsorption accounts for a large proportion and can reach adsorption equilibrium in a short time, which is in agreement with the viscous Grain content less relevant. If the adsorbent has been able to provide enough adsorption sites, then the amount of soil increases but will reduce its adsorption capacity. The higher the pH value is, the lower the temperature is, the stronger is the adsorption capacity of ammonia nitrogen on the rock sample. The adsorption capacity is related to the initial concentration of ammonia solution in a certain range. The higher the initial concentration is, the larger the adsorption capacity is.