文档介绍：parison Study of Carbon Dioxide Adsorption on Polydimethylsiloxane, Silica Gel,and Illinois No. 6 Coal Using in Situ Infrared Spectroscopy Adsorption of supercritical carbon dioxide (CO2) on polydimethylsiloxane (PDMS), silica gel (SiO2), and Illinois No. 6 coal pared using in situ attenuated total reflectance Fourier transform infrared (ATRFTIR) spectroscopy at pressures up to 14 MPa and temperatures at 40°C and 50° C. Only physical adsorption of CO2 was recorded for PDMS, SiO2, and Illinois No. 6. There was no evidence of the formation of carbonic acid, bicarbonates, carbonates, or any other reaction product between CO2 and PDMS, SiO2, and Illinois No. 6 coal. Carbon dioxide adsorption on PDMS and SiO2 produced a linear isotherm while a typical Langmuirlike isotherm was observed for Illinois No. 6 coal. Attempts to measure CO2 induced swelling of the three materials was essful due to the design of the ATR-FTIR cell. 在 14 MPa 的压力和在 40°C和 50°C 的温度条件下, 比较了聚二***硅氧烷(PDMS) 、硅胶( 二氧化硅)、和伊利诺斯州 6 号煤对超临界二氧化碳(CO2) 的吸附, 测试利用“原位衰减全反射傅里叶变换红外光谱”(ATRFTIR) 进行。在PDMS,SiO2和伊利诺伊6号煤中只记录到了 CO2 的物理吸附被,没有证据显示碳酸、碳酸氢盐、碳酸盐或者反应产物生成。 CO2 在 PDMS 和二氧化硅的吸附遵循线性等温线, 然而 CO2 在伊利诺斯州 6 号煤中的吸附则遵循典型的 Langmuir 型吸附等温线。因为 ATR-FTIR 容器设计的原因,试图测量三种材料由于 CO2 引起的溶胀没有成功。 Adsorption of water vapor and carbon dioxide at carboxylic functional Abstract The adsorption of water vapor and carbon dioxide at room temperature in relation to carboxylic functional groups on the surfaces of 20different types of coal was examined. The carboxylic functional groups on the surface of coal may be considered the preferential sites of adsorption pared with theother groups. The adsorption of water vapor and carbon dioxide was found to increase in proportion to the square root of the carboxyl groupconcentration, regardless of the partial pressure or the gas functional group adsorption sites to be present on the surfaces of hydrophobic matrices and adsorption to occur ina liquid-like closed packed state, the adsorption on