✦ LIBER ✦

Ultrafast calcination and sintering of Ca(OH)2 powder: Experimental and modeling

✍ Scribed by A. Ghosh-Dastidar; S. Mahuli; R. Agnihotri; L.-S. Fan

Publisher: Elsevier Science
Year: 1995
Tongue: English
Weight: 854 KB
Volume: 50
Category: Article
ISSN: 0009-2509
DOI: 10.1016/0009-2509(95)00043-5

No coin nor oath required. For personal study only.

✦ Synopsis

The kinetics of ultrafast calcination and sintering of Ca(OH)z powder is studied in the 900-1050°C temperature range in an entrained-flow reactor. Time-resolved kinetic data are obtained for 0-300 ms time scale with the residence time of the solids being measured on-line. The reaction exhibits very high initial calcination rates with sharp attenuation and subsequent virtual "die-off" at higher residence times. The interplay of calcination kinetics and sintering kinetics and the net effect on the overall surface area evolution is clearly elucidated. A modified grain model incorporating the sintering of the product CaO layer and the role of diffusion of evolved H20 is proposed to explain the overall phenomena. The model predictions are in good agreement with the observed experimental results.

📜 SIMILAR VOLUMES

Kinetic data and mechanistic model for i

Kinetic data and mechanistic model for initial sintering of TiO2 anatase powder

✍ Jean-Luc Hébrard; Michéle Pijolat; Michel Soustelle 📂 Article 📅 1989 🏛 Elsevier Science 🌐 English ⚖ 436 KB

Dissolution Modeling and Experimental Me

Dissolution Modeling and Experimental Measurement of CaS-H2O Binary System

✍ Ivar Zekker; Toomas Tenno; Aare Selberg; Kalev Uiga 📂 Article 📅 2011 🏛 John Wiley and Sons 🌐 English ⚖ 267 KB

Towards the rapid synthesis of pure 2223

Towards the rapid synthesis of pure 2223 powders with Bi2−xPbxSr2Ca2Cu2Oy compositions by semi-wet methods III. Role of sintering temperature and duration

✍ Dhananjai Pandey; S.S.R. Inbanathan; P.K. Srivastava; Alok Banerjee; G. Singh 📂 Article 📅 1996 🏛 Elsevier Science 🌐 English ⚖ 787 KB

Insights on the Structural Chemistry of

Insights on the Structural Chemistry of Hydrocalumite and Hydrotalcite-like Materials: Investigation of the Series Ca2M3+(OH)6Cl·2H2O (M3+: Al3+, Ga3+, Fe3+, and Sc3+) by X-Ray Powder Diffraction

✍ Isabelle Rousselot; Christine Taviot-Guého; Fabrice Leroux; Philippe Léone; Pier 📂 Article 📅 2002 🏛 Elsevier Science 🌐 English ⚖ 342 KB

Hydrotalcite and hydrocalumite are two close minerals belonging to the layered double hydroxide family. Both structures are based on positive brucite-like layers alternating with layers containing anions and water molecules. Most of synthetic ðLDHsÞ are hydrotalcite-like materials. On the other hand