Poisoning and regeneration of Pt-Pd/WO3-ZrO2 short paraffin isomerization catalysts

Quimica nova

Benitez, Viviana M.¹  Yori, Juan C.¹  Busto, Mariana¹  Vera, Carlos R.¹  Finelli, Zunilda¹  Canavese, Sergio¹ 

[1] Instituto de Investigaciones en Catálisis y Petroquímica, Santa Fe, Argentina

关键词: poisoning;    isomerization;    WO3-ZrO2.;   

DOI  :  10.1590/S0100-40422010000300003

学科分类：化学（综合）

来源: Sociedade Brasileira de Quimica

【 摘 要 】

WO3-ZrO2catalysts promoted with Pt and Pd were tested as paraffin isomerization catalystsusing n-hexane as model compound. Sulfur and amine poisoning and regenerationtests were used to assess the impact of the addition of Pt and Pd on the deactivationresistance and regenerability. Pt and PtPd catalysts were the most active forn-hexane isomerization. The low activity of the Pd catalyst was attributed topoor Pd metal properties when supported over WO3-ZrO2and to a decrease of the number of BrQnsted acid sites. PtPd was the only catalystcapable of full regeneration after S poisoning. Amine poisoning completely supressedthe isomerization activity and the original activity could only be restoredby calcination and reduction.

【 授权许可】

CC BY