Počet záznamů: 1

Preparation of Al-SBA-15 Pellets with Low Amount of Additives: Effect of Binder Content on Texture and Mechanical Properties. Application to Friedel-Crafts Alkylation

SYSNO ASEP	0357572
Druh ASEP	J - Článek v odborném periodiku
Zařazení RIV	J - Článek v odborném periodiku
Poddruh J	Článek ve WOS
Název	Preparation of Al-SBA-15 Pellets with Low Amount of Additives: Effect of Binder Content on Texture and Mechanical Properties. Application to Friedel-Crafts Alkylation
Tvůrce(i)	Topka, Pavel (UCHP-M)_{RID, ORCID, SAI} Karban, Jindřich (UCHP-M)_{RID, ORCID, SAI} Soukup, Karel (UCHP-M)_{RID, SAI, ORCID} Jirátová, Květa (UCHP-M)_{RID, ORCID, SAI} Šolcová, Olga (UCHP-M)_{RID, ORCID, SAI}
Zdroj.dok.	Chemical Engineering Journal. - : Elsevier - ISSN 1385-8947 Roč. 168, č. 1 (2011), s. 433-440
Poč.str.	8 s.
Jazyk dok.	eng - angličtina
Země vyd.	NL - Nizozemsko
Klíč. slova	mesoporous aluminosilicates ; pellets ; Al-SBA-15
Vědní obor RIV	CI - Průmyslová chemie a chemické inženýrství
CEP	GA104/09/0694 GA ČR - Grantová agentura ČR
	KAN400720701 GA AV ČR - Akademie věd
CEZ	AV0Z40720504 - UCHP-M (2005-2011)
UT WOS	000289704400050
DOI	10.1016/j.cej.2010.12.079
Anotace	Colloidal silica sol was used as a binder for the preparation of Al-SBA-15 pellets. Only 18 wt. % of silica was sufficient to form pellets that possessed mechanical strength comparable with industrial catalysts. Moreover, these pellets exhibited only minor changes in texture parameters in comparison with parent powder (the decrease of mesopore surface area and mesopore volume was not higher than 25 %). However, even such small amount of binder caused a substantial reduction of reaction rate in Friedel-Crafts alkylation of toluene with benzyl alcohol. The time to reach 50 % conversion of benzyl alcohol was for the pellets containing 18 wt. % of silica about five times higher in comparison with binder-free pellets. This decrease in the reaction rate was due to a partial decay of acid sites by alkali ions present in the binder solution and increased diffusion hindrances inside catalyst pellets.
Pracoviště	Ústav chemických procesů
Kontakt	Eva Jirsová, jirsova@icpf.cas.cz, Tel.: 220 390 227
Rok sběru	2012

Počet záznamů: 1