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

Topka, Pavel; Karban, Jindřich; Soukup, Karel; Jirátová, Květa; Šolcová, Olga

doi:https://dx.doi.org/10.1016/j.cej.2010.12.079

Number of the records: 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

1.

SYSNO ASEP	0357572
Document Type	J - Journal Article
R&D Document Type	Journal Article
Subsidiary J	Článek ve WOS
Title	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
Author(s)	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}
Source Title	Chemical Engineering Journal. - : Elsevier - ISSN 1385-8947 Roč. 168, č. 1 (2011), s. 433-440
Number of pages	8 s.
Language	eng - English
Country	NL - Netherlands
Keywords	mesoporous aluminosilicates ; pellets ; Al-SBA-15
Subject RIV	CI - Industrial Chemistry, Chemical Engineering
R&D Projects	GA104/09/0694 GA ČR - Czech Science Foundation (CSF)
	KAN400720701 GA AV ČR - Academy of Sciences of the Czech Republic (AV ČR)
CEZ	AV0Z40720504 - UCHP-M (2005-2011)
UT WOS	000289704400050
DOI	10.1016/j.cej.2010.12.079
Annotation	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.
Workplace	Institute of Chemical Process Fundamentals
Contact	Eva Jirsová, jirsova@icpf.cas.cz, Tel.: 220 390 227
Year of Publishing	2012

Number of the records: 1