(廣西大學 化學化工學院 廣西高校資源化工應(yīng)用新技術(shù)重點實驗室，南寧 530004)
摘 要: 研究在硫酸水溶液體系葡萄糖還原浸出氧化錳礦過程中的分解動力學，通過測定溶液中COD含量的變化，考察葡萄糖用量、硫酸濃度、氧化錳礦用量和反應(yīng)溫度對葡萄糖氧化分解速率的影響。結(jié)果表明:提高硫酸濃度、氧化錳礦用量和反應(yīng)溫度可以加快浸出反應(yīng)過程葡萄糖的氧化分解速率。葡萄糖的氧化分解過程可以用指數(shù)經(jīng)驗模型來描述，屬于擴散-化學反應(yīng)混合控制。通過擬合動力學數(shù)據(jù)，獲得葡萄糖氧化分解反應(yīng)的活化能為41.80 kJ/mol，COD、硫酸和氧化錳礦的表觀反應(yīng)級數(shù)分別為2.0，0.927和0.976。
關(guān)鍵字: 氧化錳礦；葡萄糖；分解；動力學
（Guangxi Colleges and Universities Key Laboratory of New Technology and Application in Resource Chemical Engineering, School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, China）
Abstract:The kinetics of decomposing of glucose during the reductive leaching process of manganese oxide ore in dilute sulfuric acid was examined. The change of COD concentration remained in solution was measured to quantify the effects of glucose dosage, sulfuric acid concentration, manganese oxide ore dosage and leaching temperature on decomposing rate of glucose. The results show that the decomposing rate of glucose increases with the increase of the leaching temperature, sulfuric acid concentration and manganese oxide ore dosage. The leaching process follows the kinetics of index empirical model, hybrid controlled by diffusion-chemical reaction and the apparent activation energy is 41.80 kJ/mol. The reaction orders of COD, sulfuric acid, manganese oxide ore are 2.0, 0.927 and 0.976, respectively.
Key words: manganese oxide ore; glucose; decomposing; kinetics
