Science Inventory

SINTERING OF NASCENT CALCIUM OXIDE

Citation:

Borgwardt*, R H. SINTERING OF NASCENT CALCIUM OXIDE. CHEMICAL ENGINEERING SCIENCE 44(1):53-60, (1989).

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Description:

The paper discusses the measurement of the sintering rate of CaO in a nitrogen atmosphere at temperatures of 700-1100 C. CaO prepared from ultrapure CaCO3 was compared with an impure CaO derived from limestone. Both materials yielded an initial surface area of 104 sq m/g. The rate of surface reduction was independent of particle size between 2 and 20 micrometers, but strongly dependent on temperature and impurities. A model was used to correlate the kinetics of surface reduction and identify lattice diffusion as the mechanisms of solid transport. Impurities increased the rate of sintering at a given temperature and reduced the activation energy. The porosity declined logarithmically with time during the intermediate stage of sintering.

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Record Details:

Record Type: DOCUMENT (JOURNAL/PEER REVIEWED JOURNAL)
Product Published Date: 01/01/1989
Record Last Revised: 08/31/2009
OMB Category: Other
Record ID: 96154

Organization:

U.S. ENVIRONMENTAL PROTECTION AGENCY

OFFICE OF RESEARCH AND DEVELOPMENT

NATIONAL RISK MANAGEMENT RESEARCH LABORATORY

AIR POLLUTION PREVENTION AND CONTROL DIVISION

ATMOSPHERIC PROTECTION BRANCH