The adsorb model of formic acid on NaX derived from TPD was discussed. It was showed that the adsorb sites were various exposed framework O2- centers bearing different basic intensity and spatial resistance. The h-pea...The adsorb model of formic acid on NaX derived from TPD was discussed. It was showed that the adsorb sites were various exposed framework O2- centers bearing different basic intensity and spatial resistance. The h-peak was attributed to O2- near S-III in supercage and l-peak to O2- near S-II in beta-cage of faujusite zeolite. The model can explain the experimental results. Meanwhile, a relative standard of basic intensity based on TPD of formic acid was founded.展开更多
The alkylation of phenol with methanol was studied and a high selectivity for O-alkylation was attained over alkali-metal cation-exchanged X zeolites. The transformation of primary products of the title reaction was a...The alkylation of phenol with methanol was studied and a high selectivity for O-alkylation was attained over alkali-metal cation-exchanged X zeolites. The transformation of primary products of the title reaction was also studied over CsX zeolite. On the basis of experimental results, a reaction scheme on CsX zeolite was suggested.展开更多
In this paper the effect of ion-exchange simplified as water handling on basic zeolitewas studied.It was foond that the interaction between chemisorbed water and Na+-O2- couplewould increase the total number of basic ...In this paper the effect of ion-exchange simplified as water handling on basic zeolitewas studied.It was foond that the interaction between chemisorbed water and Na+-O2- couplewould increase the total number of basic sites, while weaken the intensity of each basic sites.Theprocess can be explained by the adsorb model of organic acid on NaX presented before.展开更多
文摘The adsorb model of formic acid on NaX derived from TPD was discussed. It was showed that the adsorb sites were various exposed framework O2- centers bearing different basic intensity and spatial resistance. The h-peak was attributed to O2- near S-III in supercage and l-peak to O2- near S-II in beta-cage of faujusite zeolite. The model can explain the experimental results. Meanwhile, a relative standard of basic intensity based on TPD of formic acid was founded.
文摘The alkylation of phenol with methanol was studied and a high selectivity for O-alkylation was attained over alkali-metal cation-exchanged X zeolites. The transformation of primary products of the title reaction was also studied over CsX zeolite. On the basis of experimental results, a reaction scheme on CsX zeolite was suggested.
文摘In this paper the effect of ion-exchange simplified as water handling on basic zeolitewas studied.It was foond that the interaction between chemisorbed water and Na+-O2- couplewould increase the total number of basic sites, while weaken the intensity of each basic sites.Theprocess can be explained by the adsorb model of organic acid on NaX presented before.
