ANG储运技术吸附实验研究

Experimental Study on Adsorption of ANG Storage and Transportation Technology

以成型活性炭作为吸附剂,先进行了实验室吸附实验(以纯甲烷为实验气样,设置吸附温度分别为298.15 K、303.15 K、313.15 K、323.15 K,吸附压力≤5 MPa),再进行了中试实验(以管输天然气为实验气源,吸附温度为298.15 K,吸附压力为3.3~10.0 MPa),并与CNG储运技术进行对比,得到以下结论:实验室吸附实验结果显示,当温度不变时,随着压力升高,吸附剂吸附天然气的量上升,增长速度与压力成负相关;当压力不变时,随着温度升高,吸附剂吸附天然气的量下降,下降速度几乎与温度无关。中试实验结果显示,在298.15 K条件下,吸附剂吸附天然气的量随压力的升高而上升。通过对比可知,在温度、压力相同时,相同容积的储存容器,ANG储运技术的吸附体积比大于CNG储运技术的储存体积比,具有一定商业价值。针对中试实验存在较大吸附热效应的问题,可以降低充气速度,使吸附储罐充分与空气换热,将市场目标定位于对充气速度要求较低的市场。

With shaped activated carbon as the adsorbent,the laboratory adsorption experiments were first carried out(with pure methane as the experimental gas sample,the adsorption temperatures were set to 298.15 K,303.15 K,313.15 K and 323.15 K respectively,and the adsorption pressure≤5 MPa),and then the pilot experiment was conducted(using piped natural gas as experimental gas source,the adsorption temperature was 298.15 K,and the adsorption pressure was 3.3 to 10.0 MPa),and comparison was conducted with CNG storage and transportation technology.The following conclusions were obtained.The results of laboratory adsorption experiments show that when the temperature is constant,the amount of natural gas adsorbed by the adsorbent increases with the increase of pressure,and the growth rate is negatively correlated with the pressure.When the pressure is constant,the amount of natural gas adsorbed by the adsorbent decreases with the increase of temperature,and the falling speed is almost independent of temperature.The pilot test results show that under the condition of 298.15 K,the amount of natural gas adsorbed by the adsorbent increases with the increase of pressure.Through comparison,it is found that the adsorption volume ratio of ANG storage and transportation technology is larger than that of CNG storage and transportation technology when the temperature and pressure are the same,and the volume of storage container is the same,it has certain commercial value.Aiming at the problem of the large adsorption thermal effect in the pilot experiment,the charge speed can be reduced,the adsorption tank is fully heat-exchanged with the air,and the market target is positioned at a market with lower requirements on the charge speed.