WebFeb 1, 2024 · Metastable vaterite blocks are expected to show high reactivity. However, they have not been reported to date. In this study, the feasibility of fabricating an artificial vaterite block was investigated by exposing a Ca(OH) 2 compact to CO 2 under several conditions. Under a 100% H 2 O atmosphere, a calcite block was formed within three … WebApr 15, 2024 · Figure 4 is the schematic diagram of vaterite formation mechanism with glycine via carbonation of gypsum from gas desulfurization. Initially, Ca (NH 2 CH 2 …
Precipitation of calcium carbonate during direct ... - ScienceDirect
The carbonation of CaSO4·2H2O was divided into four main stages in the gas–liquid–solid system (Song et al. 2012). The complex process contains a series of chemical reactions: (1) absorption of CO2 in the ammonia solution, (2) formation of ammonium (bi)carbonate, (3) chemical reaction between … See more In this work, the effect of ultrasonic amplitude on the carbonation products of CaSO4·2H2O was investigated in gas–liquid–solid system. The XRD diffraction peaks of … See more The results mentioned above showed that pure vaterite was obtained by adjusting the ultrasonic amplitude. However, the precipitation mechanism of vaterite during the carbonation of CaSO4·2H2O under ultrasound in a … See more WebVaterite-type calcium carbonate has unique physical, chemical, biological and mechanical properties, and has great application prospects in the fields of daily use, biological medicine, building ... set bar valenciennes
precipitation and its application to carbon storage
WebNov 15, 2014 · Six calcium sulfoaluminate-based cementitious systems composed of calcium sulfoaluminate, calcite, vaterite, and gypsum were cured as pastes and mortars for 1, 7, 28 and 84 days. Pastes were analyzed with X-ray diffraction, thermogravimetric and differential thermal analyses. Mortars were tested for compressive strength, dimensional … WebJun 6, 2024 · Vaterite is a metastable phase of CaCO 3 and was prepared mechanochemically for the first time with the assistance of sodium … WebAug 1, 2024 · For this purpose, we demonstrate a successful mechanochemical synthesis of urea cocrystals containing secondary nutrients calcium (Ca) and sulfur (S) using widely abundant drywall gypsum waste. ... Drywall gypsum waste from both construction and manufacturing and is composed of 93 % calcium sulfate dihydrate (CaSO 4 ·2H 2 O) and … pancake chain restaurants