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

Química Nova

Benitez, Viviana M.¹  Yori, Juan C.¹  Busto, Mariana¹  Instituto de Investigaciones en Catálisis y Petroquímica, Santa Fe, Argentina¹  Vera, Carlos R.¹  Finelli, Zunilda¹  Canavese, Sergio¹ 

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-ZrO2 catalysts promoted with Pt and Pd were tested as paraffin isomerization catalysts using n-hexane as model compound. Sulfur and amine poisoning and regeneration tests were used to assess the impact of the addition of Pt and Pd on the deactivation resistance and regenerability. Pt and PtPd catalysts were the most active for n-hexane isomerization. The low activity of the Pd catalyst was attributed to poor Pd metal properties when supported over WO3-ZrO2 and to a decrease of the number of BrQnsted acid sites. PtPd was the only catalyst capable of full regeneration after S poisoning. Amine poisoning completely supressed the isomerization activity and the original activity could only be restored by calcination and reduction.

【 授权许可】

Unknown