用热浸煮法制备了铵型斜发沸石,用水热离子静态交换反应考察了铵型沸石上2NH4+Cu2+离子交换平衡时的平衡交换容量、交换效率.结果表明,铵型沸石对Cu2+的交换效率随Cu2+初始浓度增加而降低,随温度升高而增加.20℃时交换效率高达62%以上....用热浸煮法制备了铵型斜发沸石,用水热离子静态交换反应考察了铵型沸石上2NH4+Cu2+离子交换平衡时的平衡交换容量、交换效率.结果表明,铵型沸石对Cu2+的交换效率随Cu2+初始浓度增加而降低,随温度升高而增加.20℃时交换效率高达62%以上.同时该离子交换过程满足L angm u ir单分子层交换行为.40℃时仅有35.8%的NH4+被Cu2+交换,这与NH4+在沸石骨架上的配位方式和位置有关.展开更多
Recently,methane of possible abiogenic origin has been reported from many localities within the Earth’s crust.However,little is known about the mechanisms of abiogenic methane formation during such processes.The Fisc...Recently,methane of possible abiogenic origin has been reported from many localities within the Earth’s crust.However,little is known about the mechanisms of abiogenic methane formation during such processes.The Fischer-Tropsch reaction as a well known process for converting CO<sub>2</sub> to hydrocarbon gas by reaction with H<sub>2</sub> may take place on a metallic iron or iron oxide catalyst and also may take place on展开更多
文摘用热浸煮法制备了铵型斜发沸石,用水热离子静态交换反应考察了铵型沸石上2NH4+Cu2+离子交换平衡时的平衡交换容量、交换效率.结果表明,铵型沸石对Cu2+的交换效率随Cu2+初始浓度增加而降低,随温度升高而增加.20℃时交换效率高达62%以上.同时该离子交换过程满足L angm u ir单分子层交换行为.40℃时仅有35.8%的NH4+被Cu2+交换,这与NH4+在沸石骨架上的配位方式和位置有关.
文摘Recently,methane of possible abiogenic origin has been reported from many localities within the Earth’s crust.However,little is known about the mechanisms of abiogenic methane formation during such processes.The Fischer-Tropsch reaction as a well known process for converting CO<sub>2</sub> to hydrocarbon gas by reaction with H<sub>2</sub> may take place on a metallic iron or iron oxide catalyst and also may take place on
