کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
78529 49334 2013 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Heats of water sorption studies on zeolite–MgSO4 composites as potential thermochemical heat storage materials
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی کاتالیزور
پیش نمایش صفحه اول مقاله
Heats of water sorption studies on zeolite–MgSO4 composites as potential thermochemical heat storage materials
چکیده انگلیسی

The use of magnesium sulphate as a means for long term heat storage, offers a compact, clean, and cheap way of storing solar energy during the summer season, and due to its high energy storage density, is a superior candidate for chemical heat storage. The impregnation of MgSO4 in a highly porous host provides a variety of enhancements, particularly offering a large absorption surface area available for MgSO4 and H2O molecules. Four series of wide pore zeolite composite materials containing varying quantities of MgSO4 (from 5 to 15 wt%) have been prepared and characterized. Heats of sorption/desorption cycles were recorded using thermogravimetry coupled to differential scanning calorimetry (TG-DSC). Zeolites Na–X, Mordenite and Y (Na and H) were selected, with the aim of impregnating the highest quantity of MgSO4, whilst achieving the highest heat release/store possible. Zeolites Na–Y and H–Y composites containing 15 wt% MgSO4 achieved the highest heats of hydration (1090 and 867 J g−1 sample, respectively) compared to zeolite Na–X and Mordenite composites containing 15 wt% MgSO4 (731 and 507 J g−1, respectively) and was attributed to the retention of the high surface area and pore volume of the host zeolite.


► Heat storage capacity of wide pore zeolites and composites with MgSO4 determined.
► Pore volume determination of zeolites/MgSO4 composites.
► Zeolite Y (Na and H) composites achieved high heat of water sorption.
► Maintaining a large pore volume after MgSO4 impregnation is crucial.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Solar Energy Materials and Solar Cells - Volume 112, May 2013, Pages 112–119
نویسندگان
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