用加速量热仪研究铁离子对硝酸铵热稳定性的影响,并将其结果与含氯离子硝酸铵的热分解实验结果进行比较。结果表明,铁离子也有很强的催化能力,使硝酸铵的起始分解温度降低约60℃。在恒温条件下的试验结果也证明铁离子对硝酸铵具有催化...用加速量热仪研究铁离子对硝酸铵热稳定性的影响,并将其结果与含氯离子硝酸铵的热分解实验结果进行比较。结果表明,铁离子也有很强的催化能力,使硝酸铵的起始分解温度降低约60℃。在恒温条件下的试验结果也证明铁离子对硝酸铵具有催化作用。根据得到的ARC数据,对含铁离子硝酸铵的热分解进行动力学计算,运用最概然机理函数法得到了最可能的机理函数为f(α)=1-,α含铁离子硝酸铵的活化能E=195.41 J/m o l。结果表明,硝酸铵中一旦混入铁离子,其热稳定性将会降低。展开更多
The platinum catalyst supported on carbon covered γ-Al 2O 3(CCA) or γ-Al 2O 3 with K 2O as assistant was prepared and used for preparation of o-phenylphenol(OPP) by dehydrogenation of 2-cyclohexenyl- cyclohexanone. ...The platinum catalyst supported on carbon covered γ-Al 2O 3(CCA) or γ-Al 2O 3 with K 2O as assistant was prepared and used for preparation of o-phenylphenol(OPP) by dehydrogenation of 2-cyclohexenyl- cyclohexanone. The catalyst was pre-poisoned with CS 2 to improve its catalytic activity. The results showed that the catalytic performance of Pt supported on CCA is better than that supported on γ-Al 2O 3. When the catalyst consists of \[ω(Pt)=0.5%, ω(K 2O)=1%\]/CCA\ and m(CS 2)∶m(Pt) is 1.0∶100, the selectivity of OPP was more 96% in a reaction condition of 350 ℃ and flow rate of H 2 at 60 mL/min.展开更多
文摘用加速量热仪研究铁离子对硝酸铵热稳定性的影响,并将其结果与含氯离子硝酸铵的热分解实验结果进行比较。结果表明,铁离子也有很强的催化能力,使硝酸铵的起始分解温度降低约60℃。在恒温条件下的试验结果也证明铁离子对硝酸铵具有催化作用。根据得到的ARC数据,对含铁离子硝酸铵的热分解进行动力学计算,运用最概然机理函数法得到了最可能的机理函数为f(α)=1-,α含铁离子硝酸铵的活化能E=195.41 J/m o l。结果表明,硝酸铵中一旦混入铁离子,其热稳定性将会降低。
文摘The platinum catalyst supported on carbon covered γ-Al 2O 3(CCA) or γ-Al 2O 3 with K 2O as assistant was prepared and used for preparation of o-phenylphenol(OPP) by dehydrogenation of 2-cyclohexenyl- cyclohexanone. The catalyst was pre-poisoned with CS 2 to improve its catalytic activity. The results showed that the catalytic performance of Pt supported on CCA is better than that supported on γ-Al 2O 3. When the catalyst consists of \[ω(Pt)=0.5%, ω(K 2O)=1%\]/CCA\ and m(CS 2)∶m(Pt) is 1.0∶100, the selectivity of OPP was more 96% in a reaction condition of 350 ℃ and flow rate of H 2 at 60 mL/min.
