Attapulgite based LiCl composite adsorbents for cooling and air conditioning applications

Chen, Haijun; Cui, Qi; Tang, Y.J.; Chen, Xiujun; Hu-qing, Yao

doi:10.1016/j.applthermaleng.2007.12.015

Cited by 60 publications

(7 citation statements)

References 17 publications

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“…The total mass loss of ~15 wt.%, ~14 wt.%, and ~14 wt.% was observed in the TG curves during heating. The TG curve of M1A3 microspheres showed mass loss stages before 700°C obviously, which could be attributed to the evaporation of free water (RT‐135°C), loss of coordinated water (135‐470°C), constitution water (470‐700°C) of palygorskite and combustion of carbon and organic matters during the heating process (Figure A). As for the DTA curves, the endothermic peak presented at 540°C ranged from 400 to 600°C, was mainly due to the dehydration of −OH groups of the kaolinite phase surface and formation of metakaolin, as described by the following reaction Equation 3 .…”

Section: Resultsmentioning

confidence: 99%

Low‐cost, green synthesis and adsorption properties for dyes of novel porous gangue/palygorskite composite microspheres

Yan

Wang

Zhang

et al. 2019

Int J Applied Ceramic Tech

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In this work, gangue/palygorskite composite microspheres were fabricated through spray drying process and activated by calcination treatment. Its microstructure and adsorption capacity for the removal of dye (MB) were also studied, systematically. Results showed that kaolinite, α-quartz and palygorskite were the major phases in microspheres after proper calcination (lower than 900°C). BET-specific surface area of the microspheres reached the maximum value of 62.23 m 2 /g at 700°C, and then decreased with further increasing the heating temperature. In general, composite microspheres showed the largest adsorption capacity of MB after heat-treated at 700°C. The q max of MB onto microspheres was 29.9-51.9 mg/g. The adsorption process of MB onto microspheres was well described by both the pseudo-second-order kinetic and Langmuir isotherm model. The composite microspheres also had extraordinary recyclability. This novel microsphere could be employed as a candidate for novel absorbent and filter medium in the practical application for dye treatment in industrial applications.

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Section: Resultsmentioning

confidence: 99%

Low‐cost, green synthesis and adsorption properties for dyes of novel porous gangue/palygorskite composite microspheres

Yan

Wang

Zhang

et al. 2019

Int J Applied Ceramic Tech

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“…Other authors proposed other promising adsorbents such as attapulgite clay sorbents impregnated with inorganic salts [55,56], silicalite MCM-41 [57] or zeolite/active carbon compounds [58], that showed attractive sorption properties for utilization of low grade heat. Figure 1.7 shows the water adsorption isobar (p H 2 O ¼ 11 mbar) measured at CNR ITAE for different adsorbents by the thermo-gravimetric technique based on a Cahn microbalance.…”

Section: New Trendsmentioning

confidence: 99%

Basics of Adsorption Heat Pump Processes

Freni

Dawoud

Bonaccorsi

et al. 2015

Characterization of Zeolite-Based Coatings for Adsorption Heat Pumps

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“…The adsorption-desorption performance for ammonia on the composite adsorbent was measured in the device shown Figure 2 [14] . The experimental equipment system was made up of adsorption column, ammonia cylinder, vacuum pump and thermostatic device.…”

Section: Investigating Adsorption-desorption and Refrigeration Permentioning

confidence: 99%

Adsorption and Refrigeration Performance of Ammonia-Composite Adsorbent Working Pair

Zheng

Sheng

et al. 2011

2011 Third International Conference on Measuring Technology and Mechatronics Automation

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Composite absorbent (CAds-AC-15) mainly used activated carbon and CaCl 2 as the resources for adsorption refrigeration were prepared by the mixed method, and the content of activated carbon in CAds-AC-15 was 15%. Adsorption isotherms of ammonia on CAds-AC-15 were determined by positive gravimetric method. Adsorptiondesorption cycle performance and cooling characteristics of CAds-AC-15-ammonia working pair was evaluated by selfmade adsorption -desorption measuring device. Experimental results show that the equilibrium capacity of ammonia on the CAds-AC-15 is up to 1.136kg/kg ads at 30 , which is 5% lower than that of CaCl 2 . With the conditions of adsorption temperature 30 , ammonia evaporation pressure 0.25 MPa, desorption temperature 300 , the performance of CAds-AC-15-ammonia working pair is stable after repetitious adsorption-desorption cycles, adsorption capacity of ammonia on the CAds-AC-15 and its cyclic adsorption capacity is 0.55~0.65 kg/kg and 0.2~0.25 kg/kg, respectively. The cooling capacity is up to 328.38kJ/kg ads , which is twice as high as CaCl 2 -ammonia working pair.

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Attapulgite based LiCl composite adsorbents for cooling and air conditioning applications

Cited by 60 publications

References 17 publications

Low‐cost, green synthesis and adsorption properties for dyes of novel porous gangue/palygorskite composite microspheres

Low‐cost, green synthesis and adsorption properties for dyes of novel porous gangue/palygorskite composite microspheres

Basics of Adsorption Heat Pump Processes

Adsorption and Refrigeration Performance of Ammonia-Composite Adsorbent Working Pair

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