CA-FSPCMs were constructed using a lightweight and high strength carbon aerogel to encapsulate PEG-6000, fabricated using biomass xanthan gum and polyimide.
The effects of moisture, pH value, and coal rank on adsorption of CO2 by coal were studied using a self-made small sample coal adsorption device. Coal of different ranks was dried, acidified, and alkalized. CO2 gas (16%) was injected into the device at normal temperature and pressure. The results showed that the moisture and pH value in the environment and the coal rank had an influence on the CO2 adsorption capacity of coal. The saturation adsorption capacity of CO2 of acid-treated coal and alkaline-treated coal increased by 3.342%–4.255% and 0.808%–2.22%, respectively, compared to dry coal. The saturated adsorption capacity of CO2 of untreated coal was reduced by 2.176%–2.521% compared to the dry sample. According to experimental data, the existence of moisture inhibited the adsorption of CO2 by coal, and the increase or decrease in the pH value promotes the adsorption of CO2 by coal. The decrease in the pH value had the greatest influence on the adsorption of CO2 by coal. The higher coal rank resulted in the increased saturated adsorption capacity of CO2.
With the help of large general finite element analysis software ANSYS, under different parameters, this paper will have a finite element analysis of bearing capacity on circular steel tube compile short column filled with steel reinforced concrete(STCSRC).In the paper,it uses separate models to calculate and analyze.Considering the nonlinear constitutive relation of steel and concrete and determining the type of unit,it is shown that stress distribution and load-displacement curve of specimen under the effect of different parameters.According to the curve and data,analysis results of bearing capacity of specimen have been shown that bearing capacity of STCSRC will increase with concrete strength increasing and it also will increase with steel rate increasing under axial load.Because of core concrete working together with steel tube and angle steel,it can significantly improve the bearing capacity of composite columns, slow down and inhibit shearing inclined cracks occur in the core concrete and develop,and improve the ductility of columns.
The deoxidization of coal-bed methane is carried out under low temperature which ranges from 150°C to 200°C. In the three deoxidizers, the deoxidization characteristic of BJ-1 is mainly studied. With the function of BJ-1, oxygen content can be reduced to 1% or less. Moreover, the CBM whose CH4 content is below 30%, can be deoxygenated safely. When the space velocity exceeds 25000h-1, the oxygen content of outlet gas begin to great than 1%. In addition, through the experiment, the initial deoxidization temperature is determined as 160°C.
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