Structure-activity relationship and the inhibitory effect of sulfur dioxide and water on nitrous oxide formation in selective catalytic reduction of nitrogen oxides by ammonia over hollow CoO@CoMnO catalyst.

Hollow structures have attracted great interest in many areas for their diverse applications. In this work, a new catalyst with an open and hollow structure (CoO@CoMnO) is designed for selective catalytic reduction of nitrogen oxides by ammonia (NH-SCR). The as-prepared hollow-structured catalyst provides a high surface area and has thin shells.

Tailor the crystal planes of MIL-101(Fe) derivatives to enhance the activity of SCR reaction at medium and low temperature.

Mainly exposed crystal facets and controllable morphology play a key role in the final performance of the preparation of specific nanomaterials. In the present study, a metal-organic framework pyrolysis method without adding solvent modifiers was developed. By adding CO in the calcination atmosphere to change atmosphere ratio, FeO nanostructures are exposed with different crystal planes and evaluated their performance in NH-SCR reaction.

Insight into the enhancing activity and stability of Ce modified VO/AC during cyclic desulfurization-regeneration-denitrification.

Cyclic desulfurization-regeneration-denitrification over carbon-based catalysts is a promising technology for SO and NOx simultaneous elimination in steel industry. Regeneration is imperative to the long-term operation of the process, while the research is limited. In this work, Ce modified VO/AC catalyst (CeVOx/AC) with higher desulfurization and denitrification activity was prepared and the effect of cyclic regeneration was investigated.

Effect of SCR Atmosphere on the Removal of Hg by a VO-CeO/AC Catalyst at Low Temperature.

A series of VO-xCeO/AC (noted as V-Ce/AC) catalysts were synthesized by the impregnation method, which combined the advantage of AC and V-Ce. The effects of SCR atmosphere on Hg removal were systematically investigated at low temperature. The experimental results indicated that NO had a positive effect on Hg removal.

Influence of calcination temperature on the properties of titanium oxide sulfur recovery catalysts.

To study the effect of calcination temperatures on the sulfur recovery catalysts, titanium oxide (TiO2), as sulfur recovery catalysts, were treated at four calcination temperatures of 300 degrees C, 500 degrees C, 700 degrees C and 900 degrees C. The structure of the catalysts were characterized by X-ray powder diffraction (XRD), Raman, transmission electron microscopy (TEM), Scanning electron microscopy (SEM), temperature thermogravimetry (TG) and differential scanning calorimetry (DSC). The results showed that with the calcination temperature increasing, the particle size of the TiO2 catalysts increases but the surface area and total pore volume decrease.

Preparation of a carbon-based solid acid catalyst by sulfonating activated carbon in a chemical reduction process.

Sulfonated (SO(3)H-bearing) activated carbon (AC-SO(3)H) was synthesized by an aryl diazonium salt reduction process. The obtained material had a SO(3)H density of 0.64 mmol·g-1 and a specific surface area of 602 m2·g-1.