Thermochemical Decomposition of Calcium Sulfate in Presence of Carbon and Hydrogen Mix

• Main Authors: V. K. Bishimbayev, A. A. Yerubay
• Format: Article
• Language: English
• Published: al-Farabi Kazakh National University 2010-04-01
• Series: Eurasian Chemico-Technological Journal
• Online Access: http://ect-journal.kz/index.php/ectj/article/view/491

Results of research of thermodynamic modeling of thermochemical decomposition of CaSO4 by a mix of carbon and hydrogen are given in the article. Influence of temperature on degree of carbon interchange by hydrogen on a degree of formation in systems CaO, CaO3, CaS was determined. Interchange of C by H2 reduces formation of CaCO3, CaS, and formation of has an extreme character. With the help of method of research planning adequate equation of regression has been defined and optimum technological parameters ( = 1660 and 40 % degree of carbon interchange by  H2), providing full decomposition of CaSO4 to were determined. The composition of a gas phase of CaSO4 restoration, containing 16 components was established. By reduction of pressure to 0,001 P it is possible to lower temperature of process to 1400 . The chemical equation of CaSO4 interaction with carbon and hydrogen was found.