Destructive Adsorption of Chlorinated Hydrocarbons on Ultrafine (Nanoscale) Particles of Calcium Oxide. 3. Chloroform, Trichloroethene, and Tetrachloroethene
Destructive Adsorption of Chlorinated Hydrocarbons on Ultrafine (Nanoscale) Particles of Calcium Oxide. 3. Chloroform, Trichloroethene, and Tetrachloroethene
复制标题
氯化烃在超细（纳米级）氧化钙颗粒上的破坏性吸附。
DOI：
10.1021/cm9703583
复制
发表时间：
1997
影响因子：
8.6
通讯作者：
K. Klabunde
中科院分区：
文献类型：
--
作者：
O. Koper;K. Klabunde
作为安全销毁氯碳的一步法，研究了三氯乙烯、三氯甲烷和四氯乙烯与超细氧化钙的反应。气凝胶/超临界干燥法制备的氧化钙(AP-CaO)一般优于常规制备的(CP-CaO)，且远优于市售的(CM-CaO)样品，但在与C2Cl4的高温反应中，CP-CaO表现出较高的容量，但反应动力学较慢。CaO与C2HCl3反应的主要产物是CaCl2、H2O、CO和C，与CHCl3反应的主要产物是CaCl2、H2O和CO，与C2Cl4反应的主要产物是CaCl2、CaCO3和C，反应温度为300−500℃，找到了最佳反应温度。如果温度太低，反应效率就会降低，如果温度太高，效率也会下降，因为石墨的形成可能会阻止反应中心。
As a one-step approach to the safe destruction of chlorocarbons, the reactions of trichloroethene, chloroform, and tetrachloroethene with ultrafine particles of calcium oxide have been studied. Calcium oxide prepared by an aerogel/hypercritical drying method (AP-CaO) is generally superior to conventionally prepared (CP-CaO) and vastly superior to commercially available (CM-CaO) samples, although in higher temperature reactions with C2Cl4 CP-CaO exhibited higher capacity but slower reaction kinetics. The main reaction products of CaO with C2HCl3 were CaCl2, H2O, CO and C; with CHCl3 were CaCl2, H2O and CO and with C2Cl4 were CaCl2, CaCO3, and C. Reaction temperatures were 300−500 °C, and optimum temperatures were found. If temperatures were too low, reaction efficiencies were low and if too high, efficiencies could also go down due to graphite formation which could block reactive sites.