Topic
Selective catalytic reduction
About: Selective catalytic reduction is a research topic. Over the lifetime, 10502 publications have been published within this topic receiving 226291 citations.
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TL;DR: In this article, the authors used infrared Fourier transform spectroscopy (DRIFTS) to reveal the mechanism of the SO2 effect on selective catalytic reduction (SCR) reaction.
Abstract: The deposition of K can lead to deactivation of commercial V2O5–WO3/TiO2 selective catalytic reduction (SCR) catalyst while the presence of SO2 largely increases the activity of K-poisoned catalyst. For revealing the mechanism of the SO2 effect on the SCR reaction, the K-poisoned catalyst was prepared by impregnation of KNO3 solution and in situ diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS) was carried out on the fresh and K-poisoned catalyst. The results showed that the adsorption of SO2 in the presence of O2 was different between fresh and K-poisoned catalyst. The tridentate sulfate was formed with titanium in the fresh catalyst. While on the K-poisoned catalyst, the bidentate sulfate was likely formed with vanadium, which increased the number of Bronsted acid sites and the activity of the catalyst significantly.
68 citations
Patent•
18 Aug 2000TL;DR: In this paper, the authors proposed a system consisting of a source of emissions (26) and a catalyst (32) for receiving the emissions, which includes absorber catalysts and selective catalytic reduction catalysts.
Abstract: The system includes a source of emissions (26) and a catalyst (32) for receiving the emissions. Suitable catalysts are absorber catalysts and selective catalytic reduction catalysts. A plasma fuel converter (12) generates a reducing gas from a fuel source (18) and is connected to deliver the reducing gas into contact with the absorber catalyst (32) for regenerating the catalyst. A preferred reducing gas is a hydrogen rich gas and a preferred plasma fuel converter is a plasmatron. It is also preferred that the absorber catalyst be adapted for absorbing NOx.
68 citations
TL;DR: In this article, a low-temperature SCR catalysts were developed through modifying Fe-Mn/TiO 2 catalyst with holmium (Ho), and it was found that Ho/Ti = 0.1 was the optimal molar ratio for the amount of Ho addition.
68 citations
TL;DR: In this article, a co-doped 2Fe4Co-MCT catalyst was investigated for the simultaneous removal of nitric oxide (NO) and elemental mercury (Hg0) at reaction temperature lower than 200°C.
68 citations
Patent•
13 Jan 1993TL;DR: In this paper, a method for recovering carbon dioxide by absorbing carbon dioxide present in a combustion exhaust gas using an aqueous alkanolamine solution, comprising the step of bringing a combustionhaust gas from which carbon dioxide has been absorbed and removed into contact with water containing carbon dioxide.
Abstract: A method for recovering carbon dioxide by absorbing carbon dioxide present in a combustion exhaust gas using an aqueous alkanolamine solution, comprising the step of bringing a combustion exhaust gas from which carbon dioxide has been absorbed and removed into contact with water containing carbon dioxide. A method for treating a combustion exhaust gas for denitration using ammonia as a reducing agent and for removal of carbon dioxide by absorption with an aqueous alkanolamine solution, which method comprising the steps of recovering ammonia present in the combustion exhaust gas after the carbon dioxide removal, and using the recovered ammonia as a reducing agent for the denitration. A method for removing CO₂ from a combustion exhaust gas comprising the step of bringing the combustion exhaust gas into contact under atmospheric pressure with an aqueous monoethanolamine solution having a concentration of 35% by weight or more.
68 citations