The thermal decompositions of two systems(No.1, KClO3(52.2％ )/CuO(26.0％ )/S(9.6％ )/Mg- Al(3.5％ )/C6Cl6(4.35％ ) and No.2,KClO3(52.2％ )/CuO(26.0％ )/S(9.6％ )/Mg- Al(3.5％ )/C6Cl6(4.35％ )) are studied using Accel...The thermal decompositions of two systems(No.1, KClO3(52.2％ )/CuO(26.0％ )/S(9.6％ )/Mg- Al(3.5％ )/C6Cl6(4.35％ ) and No.2,KClO3(52.2％ )/CuO(26.0％ )/S(9.6％ )/Mg- Al(3.5％ )/C6Cl6(4.35％ )) are studied using Accelerating Rate Calorimeter (ARC). Temperature vs time curve and pressure vs time curve of reactions are shown in Fig.1 and Fig.2 respectively. The basic data including reaction time(1.3 and 7.3 min respectively), initial temperature(159 and 150℃ respectively),temperature at the maximum rate(272 and 272℃ respectively), the maximum pressure(420 and 190 kPa respectively) and the activation energies(175.6 and 135.2 kJ· mol－ 1 respectively) of the thermal decomposition are given to evaluate the safety of the two systems. Results indicate that system No.2 is safer than system No.1. Compared with the traditional methods, ARC technique can be used to measure temperature and pressure of exothermic reaction concurrently, to find the tiny exothermicity and to determine the initial temperature of exothermic reaction.展开更多
The Spent loaded-Pd cordierite honeycomb ceramic automotive catalytic converters,which were roasted to remove the deposit charcoal and other organic compounds,and were milled less then 100 mesh were reduced by HCOOH,w...The Spent loaded-Pd cordierite honeycomb ceramic automotive catalytic converters,which were roasted to remove the deposit charcoal and other organic compounds,and were milled less then 100 mesh were reduced by HCOOH,which PdO was reduced to Pd and then the Pd was selectively leached with HCl-NaClO3.Palladium was determined by DDO spectrophotometry.In this paper,the determined results of several leaching methods were compared.The key factors which affected the Pd leaching by the system of HCl-NaClO3 were discussed and the optimal leaching conditions were proposed.The results indicated the Pd in automotive catalysts can be quantitatively analyzed by DDO spectrophotometry with HCl-NaClO3 for Pd leaching and at the same time the palladium of Pd-catalysts can be quantitatively determined.展开更多
The stability of benzotrifuroxan （BTF） and its mixtures with TATNB,TCTNB or NaN3 was studied The explosive performance of BTF was affected by all impurities.NaN3 could increase the thermal sensitivity of BTF,whereas...The stability of benzotrifuroxan （BTF） and its mixtures with TATNB,TCTNB or NaN3 was studied The explosive performance of BTF was affected by all impurities.NaN3 could increase the thermal sensitivity of BTF,whereas TATNB could enhance the mechanic sensitivity.展开更多
文摘The thermal decompositions of two systems(No.1, KClO3(52.2％ )/CuO(26.0％ )/S(9.6％ )/Mg- Al(3.5％ )/C6Cl6(4.35％ ) and No.2,KClO3(52.2％ )/CuO(26.0％ )/S(9.6％ )/Mg- Al(3.5％ )/C6Cl6(4.35％ )) are studied using Accelerating Rate Calorimeter (ARC). Temperature vs time curve and pressure vs time curve of reactions are shown in Fig.1 and Fig.2 respectively. The basic data including reaction time(1.3 and 7.3 min respectively), initial temperature(159 and 150℃ respectively),temperature at the maximum rate(272 and 272℃ respectively), the maximum pressure(420 and 190 kPa respectively) and the activation energies(175.6 and 135.2 kJ· mol－ 1 respectively) of the thermal decomposition are given to evaluate the safety of the two systems. Results indicate that system No.2 is safer than system No.1. Compared with the traditional methods, ARC technique can be used to measure temperature and pressure of exothermic reaction concurrently, to find the tiny exothermicity and to determine the initial temperature of exothermic reaction.
文摘The Spent loaded-Pd cordierite honeycomb ceramic automotive catalytic converters,which were roasted to remove the deposit charcoal and other organic compounds,and were milled less then 100 mesh were reduced by HCOOH,which PdO was reduced to Pd and then the Pd was selectively leached with HCl-NaClO3.Palladium was determined by DDO spectrophotometry.In this paper,the determined results of several leaching methods were compared.The key factors which affected the Pd leaching by the system of HCl-NaClO3 were discussed and the optimal leaching conditions were proposed.The results indicated the Pd in automotive catalysts can be quantitatively analyzed by DDO spectrophotometry with HCl-NaClO3 for Pd leaching and at the same time the palladium of Pd-catalysts can be quantitatively determined.
文摘The stability of benzotrifuroxan （BTF） and its mixtures with TATNB,TCTNB or NaN3 was studied The explosive performance of BTF was affected by all impurities.NaN3 could increase the thermal sensitivity of BTF,whereas TATNB could enhance the mechanic sensitivity.
