Activated carbon/superporous hydrogel composite-based polymer desiccants for capturing water vapor from humid air

IF 4.5 2区工程技术 Q2 ENGINEERING, CHEMICAL

Powder Technology Pub Date : 2025-03-31 DOI:10.1016/j.powtec.2025.121001

Mubinul Islam , Hemant Mittal , Ali Al Alili , Saeed Alhassan , Vaneet Kumar , Md Islam

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Abstract

The removal of water vapor from the atmosphere is crucial across various industries, and high-performance porous solid desiccants can enhance sustainable practices. Traditional desiccants like silica gel have limitations, including low adsorption capacity and high regeneration temperatures. This study introduces superporous hydrogel (SPH) composites made from acrylic acid and dimethyl acrylamide, with porous activated carbon from sunflower seed shells as fillers. We characterized the desiccants using techniques such as FTIR, XRD, SEM, and TGA. The water vapor adsorption isotherm for both SPH and the composite displayed type-III isotherms, indicating capillary condensation as the main adsorption mechanism. The composite SPH achieved a maximum water vapor adsorption capacity of 0.908 g_wat/g_ads at 0.9 relative pressure and 25 °C, surpassing the pristine SPH by 19 %. Durability tests showed the composite retained 93 % efficiency after ten cycles, compared to 86 % for the pristine SPH, demonstrating its enhanced reusability.

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来源期刊

Powder Technology 工程技术-工程：化工

CiteScore

9.90

自引率

15.40%

发文量

1047

审稿时长

46 days

期刊介绍： Powder Technology is an International Journal on the Science and Technology of Wet and Dry Particulate Systems. Powder Technology publishes papers on all aspects of the formation of particles and their characterisation and on the study of systems containing particulate solids. No limitation is imposed on the size of the particles, which may range from nanometre scale, as in pigments or aerosols, to that of mined or quarried materials. The following list of topics is not intended to be comprehensive, but rather to indicate typical subjects which fall within the scope of the journal's interests: Formation and synthesis of particles by precipitation and other methods. Modification of particles by agglomeration, coating, comminution and attrition. Characterisation of the size, shape, surface area, pore structure and strength of particles and agglomerates (including the origins and effects of inter particle forces). Packing, failure, flow and permeability of assemblies of particles. Particle-particle interactions and suspension rheology. Handling and processing operations such as slurry flow, fluidization, pneumatic conveying. Interactions between particles and their environment, including delivery of particulate products to the body. Applications of particle technology in production of pharmaceuticals, chemicals, foods, pigments, structural, and functional materials and in environmental and energy related matters. For materials-oriented contributions we are looking for articles revealing the effect of particle/powder characteristics (size, morphology and composition, in that order) on material performance or functionality and, ideally, comparison to any industrial standard.