TAILIEUCHUNG - Thermodynamics Interaction Studies Solids, Liquids and Gases 2011 Part 5

Tham khảo tài liệu 'thermodynamics interaction studies solids, liquids and gases 2011 part 5', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | 190 Thermodynamics - Interaction Studies - Solids Liquids and Gases The obtained carbon monoliths were tested as potential adsorbents for CO2 finding a retention capacity between 88-164 mgCO2g-1 at 273K and atmospheric pressure in Figure 22 to observe the isotherms of the samples with higher and lower CO2 adsorption capacity in each series the monoliths with a better performance in the retention of this gas were COD32 and CUD28. The table 10 compiles the characteristics of the carbon monoliths prepared show the data obtained for the interaction of three molecules of interest in the characterization of materials. Additionally adsorption data were used for the calculation of three parameters noDR nmL KL which are measures of the adsorption capacity. Sample N2 CO2 C6 h6 Sbet m7g no no nm K Eo KJ mol -AHimm J g Eo KJ mol COD28 1270 130 COD32 1320 147 COD36 1318 132 COD48 975 112 CUD28 1013 123 CUD32 1397 130 CUD36 1711 120 CUD48 1706 96 Table 10. Characteristics of carbon monoliths. Figure 22 shows the relationship between the number of moles of the monolayer determined by two different models nm by the Langmuir model and no calculated from Dubinin Raduskevich shows that the data are a tendency for both precursors although they are calculated from models with different considerations. There are two points that fall outside the general trend CUD28 and COD32 samples which despite having the highest value of no in each series not have the highest nm The Dubinin Raduskevich equation is use to determinate the characteristic adsorption energies of N2 and CO2 Eo for each samples likewise by the Stoeckli y Krahenbuehl equation equation 14 was determined benzene Eo in Figure 23 shows the relationship between .

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