Effect of catalyst formulation (Rh, Rh-Pt) on the performance of a natural gas hybrid catalytic burner

2011-08-01
Cimino, S.
Allouis, Christophe Gerard
Pagliara, R.
Russo, G.
An extensive experimental campaign was carried out on a prototype hybrid radiant burner with ultra low emissions based on the novel concept of fuel-rich catalytic + homogeneous flame combustion with inter-stage heat transfer. Special attention was paid to the impact of two alternative active formulations for the catalytic partial oxidation stage (0.5% Rh and 0.25-0.25% Rh-Pt on gamma-Al2O3) on the general performance of the burner, and particularly on its NOx emissions. The hybrid burner was operated with methane in the 4-30 kW power range, at varying the feed equivalence ratio phi from 2.0 to 3.6. InfraRed thermography was used to simultaneously investigate the catalytic surfaces and the corresponding subsequent diffusion flames. Moreover this work attempts to correlate detailed experimental data on syn-gas compositions at the exit of the CPO reactor with emissions in the exhaust. Experimental evidence of the reduction of both thermal and prompt NOx formation mechanism is presented. (C) 2011 Elsevier B. V. All rights reserved.
CATALYSIS TODAY

Suggestions

Effect of freeboard extension on co-combustion of coal and olive cake in a fluidized bed combustor
Akpulat, Onur; Varol, Murat; Atımtay, Aysel (2010-08-01)
In this study, flue gas emissions and combustion efficiencies during combustion and co-combustion of olive cake and coal were investigated in a bubbling fluidized bed. Temperature distributions along the combustion column and flue gas concentrations of O-2, CO, SO2 and NOx were measured during combustion experiments. Two sets of experiments were performed to examine the effect of fuel composition, excess air ratio and freeboard extension on flue gas emissions and combustion efficiency.
Effect of chromium on the oxidation of steels used in the construction of petroleum refinery heaters
Sultan, Abdelrahman Saleh; Karakaya, İshak; Department of Metallurgical and Materials Engineering (2013)
Low chromium steels used in the construction of petroleum refinery heaters work in flue gas environments containing water vapor. On the other hand, the higher oxidation rates of chromium containing steels in moist atmospheres have been reported. P-5, P-22, P-11(containing 5, 2.25 and 1.25 %Cr) and C-5 steels, used in petroleum refinery construction, were subjected to isothermal oxidation tests. These steels were tested in two different environments; air and flue gas of natural gas combustion -CO2+2H2O+7.52N...
Effect of alumina incorporation on the sulfur tolerance of the dual-catalyst aftertreatment system for reduction of nitrogen oxides under lean conditions
Sinha Majumdar, Sreshtha; Alexander, Anne-Marie; Gawade, Preshit; Çelik, Gökhan; Ozkan, Umit S. (2019-01-15)
Presence of sulfur or sulfur additives in natural gas lead to the formation of sulfur dioxide in the exhaust stream of natural gas-fired lean-burn engines. The sulfur tolerance and hydrothermal stability of the dual-catalyst aftertreatment system comprising a reduction catalyst (palladium supported on sulfated zirconia-Pd/SZ) and an oxidation catalyst (cobalt oxide supported on ceria-CoOx/CeO2) for NOx reduction under lean-burn conditions has been tested under simulated engine exhaust conditions. Alumina-in...
Effect of Pd loading in Pd-Pt bimetallic catalysts doped into hollow core mesoporous shell carbon on performance of proton exchange membrane fuel cells
Ficicilar, Berker; BAYRAKÇEKEN YURTCAN, Ayşe; Eroğlu, İnci (2009-08-01)
A significantly active Pd-Pt/carbon electrocatalyst for polymer electrolyte membrane fuel cells was synthesized by microwave irradiation using a hollow core mesoporous shell (HCMS) carbon as catalyst support that was prepared by template replication of core/shell spherical silica particles and two different carbon precursors. Pt/Pd percent weight ratios on carbon support were varied as 20/0, 15/5, 10/10, 5/15 to 0/20. As the average pore diameter of the carbon support was increased from 3.02 nm to 3.90 nm b...
Effect of carbon nanotube surface treatment on the morphology, electrical, and mechanical properties of the microfiber-reinforced polyethylene/poly(ethylene terephthalate)/carbon nanotube composites
Yesil, Sertan; Bayram, Göknur (2013-01-15)
The aim of this study is to investigate the effects of carbon nanotube (CNT) chemical properties, CNT content, and molding temperature on the morphology, electrical, and mechanical properties of the microfiber-reinforced polymer composites. These composites were prepared by extrusion and hot stretching the poly(ethylene terephthalate) (PET)/CNT phase in high density polyethylene (HDPE) matrix. Surfaces of the CNT were modified by purification with strong acid mixture (HNO3 : H2SO4 mixture 1 : 1 by volume) f...
Citation Formats
S. Cimino, C. G. Allouis, R. Pagliara, and G. Russo, “Effect of catalyst formulation (Rh, Rh-Pt) on the performance of a natural gas hybrid catalytic burner,” CATALYSIS TODAY, pp. 72–78, 2011, Accessed: 00, 2021. [Online]. Available: https://hdl.handle.net/11511/89873.