Reaction kinetics of malachite in ammonium carbamate solution

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• 作者：Ying-Bo Mao ; Jiu-Shuai Deng ; Shu-Ming Wen ; Jian-Jun Fang
• 关键词：dissolution ; kinetics ; malachite ; ammonium carbamate
• 刊名：Chemical Papers
• 出版年：2015
• 出版时间：September 2015
• 年：2015
• 卷：69
• 期：9
• 页码：1187-1192
• 全文大小：
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Chemistry/Food Science, general; Industrial Chemistry/Chemical Engineering; Biochemistry, general; Medicinal Chemistry; Materials Science, general; Biotechnology;
• 出版者：Springer International Publishing
• ISSN：1336-9075
• 卷排序：69

文摘

The dissolution of malachite particles in ammonium carbamate (AC) solutions was investigated in a batch reactor, using the parameters of temperature, AC concentration, particle size, and stirring speed. The shrinking core model was evaluated for the dissolution rate increased by decreasing particle size and increasing the temperature and AC concentration. No important effect was observed for variations in stirring speed. Dissolution curves were evaluated in order to test shrinking core models for fluid-solid systems. The dissolution rate was determined as being controlled by surface chemical reaction. The activation energy of the leaching process was determined as 46.04 kJ mol−1.