ScholarLens Back to search
2010•Ranliao huaxue xuebaoRequires access

Alkali deactivation and regeneration of nano V_2O_5-WO_3/TiO_2 catalysts

Xiaojuan Tian

Open publisher page 3 citations

Abstract

The nano TiO2/ceramic supported V2O5-WO3 catalysts(V2O5-WO3/TiO2(C)) were prepared.Their poisoning by alkali metal(K,Na) impregnated and regeneration were investigated.The catalysts were characterized by XRD,FT-IR,H2-TPR,XPS measurements.The results indicated that the catalytic activity is decreased by adding alkali metals;potassium is more poisonous than sodium.FT-IR results suggested that Lewis acid sites in the catalysts are active in the de-NOx reaction.H2-TPR and XPS analysis revealed that potassium leads to a decrease of the surface redox ability,which may reduce the oxygen adsorption and the SCR activity of the catalyst.Washing with water can not get back the catalyst activity,suggesting that potassium is not physically deposited on the catalyst surface.The activity of the poisoned catalysts can be well regenerated by washing with sulfuric acid at high temperature.

About this research paper

What this paper is about

The nano TiO2/ceramic supported V2O5-WO3 catalysts(V2O5-WO3/TiO2(C)) were prepared.Their poisoning by alkali metal(K,Na) impregnated and regeneration were investigated.The catalysts were characterized by XRD,FT-IR,H2-TPR,XPS measurements.The results indicated that the catalytic activity is decreased by adding alkali metals;potassium is more poisonous than sodium.FT-IR results suggested that Lewis acid sites in the catalysts are active in the de-NOx reaction.H2-TPR and XPS analysis revealed that potassium leads to a decrease of the surface redox ability,which may reduce the oxygen adsorption and the SCR activity of the catalyst.Washing with water can not get back the catalyst activity,suggesting that potassium is not physically deposited on the catalyst surface.The activity of the poisoned catalysts can be well regenerated by washing with sulfuric acid at high temperature.

Why it matters

OpenAlex reports 3 citations for this work. Citation counts describe recorded attention and do not establish research quality.

Key contribution

A contribution statement is not available in the OpenAlex record.

Method / approach

Method details are not available in the OpenAlex metadata.

Main findings

Findings are not separately available in the OpenAlex metadata.

Limitations

Limitations are not available in the OpenAlex metadata.

Applications

Application details are not available in the OpenAlex metadata.

Available abstract

The nano TiO2/ceramic supported V2O5-WO3 catalysts(V2O5-WO3/TiO2(C)) were prepared.Their poisoning by alkali metal(K,Na) impregnated and regeneration were investigated.The catalysts were characterized by XRD,FT-IR,H2-TPR,XPS measurements.The results indicated that the catalytic activity is decreased by adding alkali metals;potassium is more poisonous than sodium.FT-IR results suggested that Lewis acid sites in the catalysts are active in the de-NOx reaction.H2-TPR and XPS analysis revealed that potassium leads to a decrease of the surface redox ability,which may reduce the oxygen adsorption and the SCR activity of the catalyst.Washing with water can not get back the catalyst activity,suggesting that potassium is not physically deposited on the catalyst surface.The activity of the poisoned catalysts can be well regenerated by washing with sulfuric acid at high temperature.

Key concepts: Catalysis, Chemistry, Alkali metal, Potassium, Inorganic chemistry, X-ray photoelectron spectroscopy, Adsorption, Sulfuric acid

Related papers

Related paper 1Related paper 2Related paper 3
Back to paper searchBrowse research topicsOriginal source
Alkali deactivation and regeneration of nano V_2O_5-WO_3/TiO_2 catalysts — Research Paper | ScholarLens