Binary salt mixture barium bromide-barium chloride for sorption applications
Year: 2025
Type: article
Abstract: Large temperature ‘jump’ and ‘ramp’ techniques, along with thermogravimetric analysis (TGA), were employed to characterise the sorption reactions of halide salt mixtures with ammonia. Using LTJ and FTR methods, a 1:1 mixture containing 50 % BaCl 2 and 50 % BaBr 2 by molar weight was studied but remained inconclusively characterised. To investigate further, samples with different BaCl 2 and BaBr 2 molar ratios (1:3, 1:1, and 3:1) were prepared. TGA results confirmed the presence of a new compound with sorption properties that vary in proportion to the molar ratios of the component salts. The effect of altering these molar ratios was evident: BaCl 2 -rich mixtures resembled pure BaCl 2 salt behaviour, while BaBr 2 -rich mixtures behaved more like pure BaBr 2 salt. Adsorption and desorption findings indicated an optimal bromide content at 50 %, beyond which the position of the reaction band becomes relatively stable—a pattern not observed in BaCl 2 -heavy mixtures. These distinct reaction “bands” expand the temperature operating range of sorption technologies by up to 30 °C, suggesting that tailored anion halide salt mixtures could be developed for advanced heat pumping and thermal storage applications.
Source: Applied Thermal Engineering
Institution: University of Warwick
Language: English
Subfield: Mechanical Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: hybrid
Estimated APC paid: $3,660
OpenAlex ID: W4410114042