raw · papers · ingested 2026-06-19
New Composite Water Sorbents CaCl2-PHTS for Low-Temperature Sorption Heat Storage
Source: https://pmc.ncbi.nlm.nih.gov/articles/PMC6359452/
PMC, open access, full structural + uptake data.
Key findings
- CaCl2 at 4 / 10 / 20 wt% in plugged hexagonal templated silica (PHTS).
- Water uptake at 40 C rises monotonically: bare 0.65 -> 4% 0.78 -> 10% 1.20 -> 20% 2.44 g/g.
- Surface area falls as salt fills pores: 810 -> 461 -> 322 -> 163 m2/g; pore volume 0.705 -> 0.189 cm3/g.
- Energy density (40 ads / 120 des / 10 dew): 71 -> 193 Wh/kg at 20 wt% (~2.7x).
- Explicit THREE-mechanism hybrid: (1) physical adsorption by host, (2) chemisorption / salt hydrate formation, (3) absorption into confined aqueous salt solution.
- Cleanest salt-loading-vs-uptake-vs-pore-structure dataset.