Dynamics of water vapour adsorption by a monolayer of loose AQSOA™-FAM-Z02 grains: Indication of inseparably coupled heat and mass transfer

Improvement of Water‐Adsorption Capacity of Silico‐Aluminophosphates by Changing Si/Al Ratio and Impregnation of Hygroscopic Salt for Application of Adsorption Chiller

“…In order to confirm the effect of the SiO 2 /Al 2 O 3 ratio of an SAPO‐34 on its water adsorption capacities, we compared the water adsorption isotherms of SA‐1, SA‐2, SA‐3, SA‐4, SA‐5, and SA‐6. In addition, the water adsorption isotherms of the AQSOA™‐FAM‐Z01 and AQSOA™‐FAM‐Z02 were also compared with that of the present SAPO‐34 sample …”

“…In addition, the water adsorption isotherms of the AQSOA™-FAM-Z01 and AQSOA™-FAM-Z02 were also compared with that of the present SAPO-34 sample. [9][10][11]13 Considering general operation conditions of an adsorption chiller, the adsorbents should show a high water uptake in the P/P 0 range of 0.1-0.3 at 308 K. This means the amount of water-adsorption capacity under this humidity range are important. Figure 5 shows the water adsorption isotherms of SA-1, SA-2, SA-3, SA-4, SA-5, and SA-6.…”

“…5 The key point of the development to enhance the efficiency of the system and to reduce the size of the chiller is developing a suitable adsorbent that exhibits high water-adsorption capacity and high bulk density. [6][7][8][9][10][11][12][13] In recent years, crystalline microporous silicoaluminophosphates (referred to as SAPO-34 for brevity) have been attracting great interest as a water adsorbent in the application of adsorption chillers. [7][8][9][10][11][12][13][14][15][16][17][18][19][20][21] Moreover, SAPO-34 has been widely used in various applications, such as selective catalysis of olefin in the methanol-to-olefin (MTO) reaction, 22,23 removal of NOx, 24 and CO 2 /CH 4 separation.…”

“…[6][7][8][9][10][11][12][13] In recent years, crystalline microporous silicoaluminophosphates (referred to as SAPO-34 for brevity) have been attracting great interest as a water adsorbent in the application of adsorption chillers. [7][8][9][10][11][12][13][14][15][16][17][18][19][20][21] Moreover, SAPO-34 has been widely used in various applications, such as selective catalysis of olefin in the methanol-to-olefin (MTO) reaction, 22,23 removal of NOx, 24 and CO 2 /CH 4 separation. 25,26 These materials are normally synthesized through a hydrothermal reaction route from an alumina source, a silica source, a phosphate source and many organic structuredirecting agents, such as tetraethylammonium hydroxide (TEAOH), 24 piperidine, 27 morpholine, 28 and triethylamine (TEA).…”

Advanced Measurement and Simulation Procedure for the Identification of Heat and Mass Transfer Parameters in Dynamic Adsorption Experiments

“…The time-dependent surface temperature change of the sample can be measured with the infrared sensor and can be used as a signal for parameter identification with an appropriate numerical heat transfer model. Especially in the case of a loose grains configuration, it can be expected that the heat transfer processes between the grain and the carrier plate strongly depend on the presence of a vapor or a gas phase, since the direct contact area is very small compared to the maximum cross-sectional area of a grain [33]. If the chambers are evacuated to a pressure below 0.01 mbar, the only heat transfer process in the absence of the vapor or gas phase is the radiative heat transfer between the grain and carrier plate.…”