The oxidative methylaion of tolucoe with methane to ethylbenzene and Styrene proCeeded over basic Y typezeolite catalyst at 1023K. KY was prepared from NaY raw powder by exchange with 0.5M KOH aqueoussolution at 363K....The oxidative methylaion of tolucoe with methane to ethylbenzene and Styrene proCeeded over basic Y typezeolite catalyst at 1023K. KY was prepared from NaY raw powder by exchange with 0.5M KOH aqueoussolution at 363K. Loaded KY were preped by impregnating aqueous solutions of LiNO3 and CsNO3 onto KYzeolite.Only KY zeolite showed very low C8-yield and selativity. Addition of alkali-metal oxides to the KYzeolite increased greatly the catalytic activity. The Cs2O(6Wt% Cs2O)/KY catalyst gave the highest C3 yield of32.2% with selelectivity of 60.9%.展开更多
Abstract: KF/Al2O3 reached maxinmun activity at the pretreatment temperature(Tp) of 623K or 723K in Ibuters isomerization at 273K. according to the amount of KF loaded. Further increment of Tp lowered the activity ...Abstract: KF/Al2O3 reached maxinmun activity at the pretreatment temperature(Tp) of 623K or 723K in Ibuters isomerization at 273K. according to the amount of KF loaded. Further increment of Tp lowered the activity of KF/Al2O3 due the suppression of [Al-OHF]strong basic sites through dehydroxylation. Changes in the state and function ofF caused the deactivation of KF/Al2O3 at high Tp.展开更多
文摘The oxidative methylaion of tolucoe with methane to ethylbenzene and Styrene proCeeded over basic Y typezeolite catalyst at 1023K. KY was prepared from NaY raw powder by exchange with 0.5M KOH aqueoussolution at 363K. Loaded KY were preped by impregnating aqueous solutions of LiNO3 and CsNO3 onto KYzeolite.Only KY zeolite showed very low C8-yield and selativity. Addition of alkali-metal oxides to the KYzeolite increased greatly the catalytic activity. The Cs2O(6Wt% Cs2O)/KY catalyst gave the highest C3 yield of32.2% with selelectivity of 60.9%.
文摘Abstract: KF/Al2O3 reached maxinmun activity at the pretreatment temperature(Tp) of 623K or 723K in Ibuters isomerization at 273K. according to the amount of KF loaded. Further increment of Tp lowered the activity of KF/Al2O3 due the suppression of [Al-OHF]strong basic sites through dehydroxylation. Changes in the state and function ofF caused the deactivation of KF/Al2O3 at high Tp.
