Experiment of water vapor adsorption/desorption rate in a desiccant rotor regenerated directly by concentrated artificial solar light irradiation

Tripoli from two Ukrainian deposits was studied in its natural and modified forms. The investigation of natural and modified tripoli involves the identification of their phase compositions through X-ray diffraction and the analysis of their water vapor adsorption-desorption isotherms. The obtained results are evidence of changes in the structural-adsorption parameters of tripoli as a result of modification. Their treatment in boiling water or acid causes apparent alterations of contents of the main phases and sizes of their crystallites, whereas their calcination causes not only the dehydroxylation of surfaces and the agglomeration of phases, but even phase transformation in the case of carbonate tripoli. After analyzing water vapor adsorption-desorption isotherms of natural and modified tripolis, some correlations between their adsorption parameters, phase compositions, main phase contents and crystallite sizes have been found.

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Dry Gel Conversion Synthesis of Hierarchical Porous MIL-100(Fe) and Its Water Vapor Adsorption/Desorption Performance

Industrial & Engineering Chemistry Research ◽

10.1021/acs.iecr.9b01647 ◽

2019 ◽

Vol 58 (19) ◽

pp. 7801-7807 ◽

Cited By ~ 5

Author(s):

Yanshu Luo ◽

Bingqiong Tan ◽

Xianghui Liang ◽

Shuangfeng Wang ◽

Xuenong Gao ◽

...

Keyword(s):

Water Vapor ◽

Water Vapor Adsorption ◽

Vapor Adsorption ◽

Dry Gel Conversion ◽

Hierarchical Porous ◽

Adsorption Desorption

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Measuring of isothermal water vapor adsorption/desorption rate using QCM method and its mass transfer resistance of a layer coated with silica-gel micro particles in a moist air

International Journal of Refrigeration ◽

10.1016/j.ijrefrig.2019.03.003 ◽

2019 ◽

Vol 105 ◽

pp. 11-18 ◽

Cited By ~ 1

Author(s):

Yoshinori Hamamoto ◽

Takehiro Nakamori ◽

Hideo Mori

Keyword(s):

Mass Transfer ◽

Water Vapor ◽

Water Vapor Adsorption ◽

Desorption Rate ◽

Mass Transfer Resistance ◽

Moist Air ◽

Transfer Resistance ◽

Micro Particles ◽

Isothermal Water ◽

Adsorption Desorption

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CO Preferential Photo-Oxidation in Excess of Hydrogen in Dark and Simulated Solar Light Irradiation over AuCu-Based Catalysts on SBA-15 Mesoporous Silica-Titania

Materials ◽

10.3390/ma11071203 ◽

2018 ◽

Vol 11 (7) ◽

pp. 1203 ◽

Cited By ~ 5

Author(s):

Isabel Barroso-Martín ◽

Antonia Infantes-Molina ◽

Aldo Talon ◽

Loretta Storaro ◽

Elena Rodríguez-Aguado ◽

...

Keyword(s):

Photoelectron Spectroscopy ◽

Light Irradiation ◽

Solar Light ◽

X Ray ◽

Preferential Oxidation Of Co ◽

Simulated Solar Light ◽

Solar Light Irradiation ◽

Vis Spectroscopy ◽

Average Size ◽

Adsorption Desorption

In this work, SBA-15 silica and silica-titania have been used as supports for photocatalysts based on AuCu alloy (Au:Cu = 1) to be used in the preferential oxidation of CO (CO-PROX) in excess of hydrogen at room temperature and atmospheric pressure both in the dark and under simulated solar light irradiation. To study their textural, structural, chemical and optical properties, the samples were characterized by X-ray diffraction (XRD), high-resolution transmission electron microscopy (HR-TEM), adsorption-desorption of N2 at −196 °C, 13C and 29Si solid state nuclear magnetic resonance (NMR), X-ray photoelectron spectroscopy (XPS) and diffuse reflectance ultraviolet-visible (DRUV-vis) spectroscopy. Titanium was present mainly in the form of titania aggregates, but also as small particles interacting with the SBA support. In both catalysts, the metal alloy nanoparticles displayed an average size of 4 nm as demonstrated by TEM measurements. AuCu/Ti-SBA turned out to be photoactive and selective in the photo-CO-PROX reaction showing the highest activity, with conversion and selectivity towards CO2 of 80%, due both to the presence of titania incorporated in SBA-15 and to the synergistic effect of Cu when alloyed with Au.

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Diffusion Barriers in the Kinetics of Water Vapor Adsorption/Desorption on Activated Carbons

Langmuir ◽

10.1021/la971317o ◽

1998 ◽

Vol 14 (14) ◽

pp. 3858-3864 ◽

Cited By ~ 68

Author(s):

A. W. Harding ◽

N. J. Foley ◽

P. R. Norman ◽

D. C. Francis ◽

K. M. Thomas

Keyword(s):

Water Vapor ◽

Activated Carbons ◽

Water Vapor Adsorption ◽

Diffusion Barriers ◽

Vapor Adsorption ◽

Adsorption Desorption ◽

Kinetics Of

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Novel porous ultrathin NiO nanosheets for highly efficient water vapor adsorption-desorption

Separation and Purification Technology ◽

10.1016/j.seppur.2019.06.005 ◽

2019 ◽

Vol 226 ◽

pp. 299-303 ◽

Cited By ~ 4

Author(s):

Yunan Wang ◽

Yan Chen ◽

Jianmin Wang ◽

Xinchao Xv ◽

Xi Yang ◽

...

Keyword(s):

Water Vapor ◽

Water Vapor Adsorption ◽

Vapor Adsorption ◽

Highly Efficient ◽

Adsorption Desorption ◽

Nio Nanosheets

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Cooling Capacity Test for MIL-101(Cr)/CaCl2 for Adsorption Refrigeration System

Molecules ◽

10.3390/molecules25173975 ◽

2020 ◽

Vol 25 (17) ◽

pp. 3975

Author(s):

Zhongbao Liu ◽

Banghua Zhao ◽

Yong Huang ◽

Xin Qi ◽

Fengfei Lou

Keyword(s):

Water Vapor ◽

Cooling Capacity ◽

Water Vapor Adsorption ◽

Condensation Temperature ◽

Refrigeration System ◽

Adsorption Refrigeration ◽

Vapor Adsorption ◽

Evaporation Temperature ◽

Adsorption Temperature ◽

Adsorption Desorption

An MIL-101(Cr) powder material was successfully prepared using the hydrothermal synthesis method, and then the original MIL-101(Cr) was combined with different mass fractions of CaCl2 using the immersion method to obtain a MIL-101(Cr)/CaCl2 composite material. The physical properties of the adsorbent were determined by X-ray powder diffraction (XRD), an N2 adsorption desorption isotherm test, and thermogravimetric analysis (TG). The water vapor adsorption performance of the metal-organic frameworks MOFs was tested with a gravimetric water vapor adsorption instrument to analyze its water vapor adsorption mechanism. Based on the SIMULINK platform in the MATLAB software, a simulation model of the coefficient of performance (COP) and cooling capacity of the adsorption refrigeration system was established, and the variation trends of the COP and cooling capacity of the adsorption refrigeration system under different evaporation/condensation/adsorption/desorption temperatures was theoretically studied. MIL101-(Cr)/CaCl2-20% was selected as the adsorption material in the adsorption refrigeration system through the physical characterization of composite materials with different CaCl2 concentrations by means of adsorption water vapor test experiments. A closed adsorption system performance test device was built based on the liquid level method. The cooling power per unit and adsorbent mass (COP and SCP) of the system were tested at different evaporation temperatures (288 K/293 K/298 K); the adsorption temperature was 298 K, the condensation temperature was 308 K, and the desorption temperature was 353 K. The experimental results showed that COP and SCP increased with the increase in the evaporation temperature. When the evaporation temperature was 298 K, the level of COP was 0.172, and the level of SCP was 136.9 W/kg. The COP and SCP of the system were tested at different adsorption temperatures (293 K/298 K/303 K); the evaporation temperature was 288 K, the condensation temperature was 308 K, and the desorption temperature was 353 K. The experimental results showed that the levels of COP and SCP decreased with the increase in the adsorption temperature. When the adsorption temperature was 293 K, the level of COP was 0.18, and the level of SCP was 142.4 W/kg.

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