Simultaneous Removal of Soot and NOx from Lean-Burn Engine Emissions Over Potassium Dititanate-Based Catalysts

2011 ◽  
Vol 3 (6) ◽  
pp. 989-993 ◽  
Author(s):  
Qiang Wang ◽  
Zipeng Xing ◽  
Weiwei Zhang ◽  
Zhanhu Guo ◽  
Jong Shik Chung
Keyword(s):  
Simultaneous Removal ◽  
Engine Emissions ◽  
Lean Burn ◽  
Potassium Dititanate

A study of the behaviour of Pt supported on CeO2–ZrO2/Al2O3–BaO as NO storage–reduction catalyst for the treatment of lean burn engine emissions

2002 ◽  
Vol 75 (1-4) ◽  
pp. 439-449 ◽  
Author(s):  
L.F Liotta ◽  
A Macaluso ◽  
G.E Arena ◽  
M Livi ◽  
G Centi ◽  
...  
Keyword(s):  
Engine Emissions ◽  
Lean Burn

Experience With Gas Engines Optimized for H2-Rich Fuels

2003 ◽  
Author(s):  
G. R. Herdin ◽  
F. Gruber ◽  
D. Plohberger ◽  
M. Wagner
Keyword(s):  
Natural Gas ◽  
Fuel Efficiency ◽  
Electrical Power ◽  
Nox Emissions ◽  
Engine Emissions ◽  
Lean Burn ◽  
Good Efficiency ◽  
Gas Engine ◽  
Natural Gas Engines ◽  
Fuel Technology

The gas engine is a very efficient possibility of a technological approach for the conversion of chemically bound energy into mechanical or electrical power. Degrees of efficiency achieved thus far through the electrification of natural gas amount to up to 45% depending on the engine size and further potentials are already being opened up. Gas engines therefore do not need to fear a comparison with diesel engines in terms of efficiency. The modern gas engines have considerable advantages regarding emissions. The state of the art for the NOx emissions of natural gas engines can presently be given as 0.7 g/kWh (diesel 5 g NOx/kWh) with practically particle-free combustion. As a result of these features the gas engine is especially suitable for the very efficient process of cogeneration of heat and power, through which total degrees of fuel efficiency of about 90% can be attained. As such, the gas engine is even superior to all previously introduced types of fuel cells. The utilization of H2-rich gases as fuel can be seen as a new field of application of gas engines. Jenbacher AG already has many years of experience in the field of “H2-rich fuels” with optimization of combustion control and mixture formation. The H2 content extend from 100% to very low caloric values of gases in the range of 1.67 MJ/Nm3. The gases to be utilized by the gas engines come primarily from thermal pyrolysis processes of biomass or RDF fuels. A very good efficiency behavior with uncommonly low NOx emissions can be determined as the common result of all gas engine sizes. In the case of the high NH3 content of e.g. wood gas, despite the extreme lean-burn operation through the primary formation of NOx from the fuel, no NOx minimum can be attained. For the future, making the step into H2-rich fuel technology particularly regarding emissions means a big step towards the low NOx concepts and thus the further reduction of engine emissions.

scholarly journals Industrial RB211 Dry Low Emission Combustion

1993 ◽  
Author(s):  
Jeff D. Willis ◽  
Ian J. Toon ◽  
Tom Schweiger ◽  
David A. Owen
Keyword(s):  
Series System ◽  
Gas Generator ◽  
Engine Emissions ◽  
Two Stage ◽  
Lean Burn ◽  
Ambient Temperatures ◽  
Practical System ◽  
Low Emission ◽  
Wide Range ◽  
In Series

The inital combustor development of a pre-mix lean burn arrangement for an aero-derivative gas generator is described. The emission targets of the practical system were for the NOx and CO to be less than 25 vppm (15% O2) over a wide range of powers and ambient temperatures. From combustion rig testing of a two stage (in series) system at 1,5 and 20 atmospheres the baseload engine emissions are predicted to be NOx = 17 vppm (15% O2) and CO = 5 vppm with a turn down of 30% power. To achieve a wider power turn down a three stage (in series) system is required.

Experimental Study on the Effect of Gas Composition Variation on Engine Emissions

2011 ◽  
Vol 383-390 ◽  
pp. 6031-6036
Author(s):  
Jia Sheng Guo ◽  
Chao Kui Qin ◽  
Fei Ma ◽  
Chao Tong
Keyword(s):  
Oxygen Sensor ◽  
Pollutant Emissions ◽  
Gas Composition ◽  
End User ◽  
Engine Emissions ◽  
Lean Burn ◽  
Loop Control ◽  
Gas Engine ◽  
Excess Air ◽  
Composition Variation

The pollutant emissions of a four-stroke spark ignition gas engine generator operating on biogas–LPG blends of varying excess air ratios and LPG concentrations were investigated in this paper. Experiments were carried out at a constant engine speed of 1400 rpm and a constant electric power output of 3.5 kW. The experimental results showed that NOx emissions were elevated at an excess air ratio of around 1.2 as the LPG concentration was increased. CO2 emissions decreased as the excess air ratio and LPG concentration increased, due to lean-burn conditions and LPG combustion. These results demonstrated that the addition of LPG to biogas enabled the effective generation of electricity using a gas engine generator through lean-burn combustion. The adding of LPG of 0%, 5%, and 10% in volume is interchangeable. Mixing inert gas such as N2 and CO2 in the end user side to increase the gas MN, thereby increasing its antiknock tendency, furthermore, the measures such as the installation of closed-loop control engine with oxygen sensor in the exhaust and adjust air-fuel ratio accurately and adjusting engine ignition timing, to adapt the changes in gas composition to ensure that the engine working conditions are not significantly affected, to meet the requirements of natural gas interchangeability.

scholarly journals Spatially-Resolved Temperature and Gas Species Changes in a Lean-Burn Engine Emissions Control Catalyst

2010 ◽  
Vol 49 (21) ◽  
pp. 10311-10322 ◽  
Author(s):  
April Russell ◽  
William S. Epling ◽  
Howard Hess ◽  
Hai-Ying Chen ◽  
Cary Henry ◽  
...  
Keyword(s):  
Emissions Control ◽  
Engine Emissions ◽  
Lean Burn ◽  
Spatially Resolved

EVALUATION OF ZERO-DIMENSIONAL CO AND NO ENGINE EMISSIONS MODELS AND THEIR SUITABILITY FOR E10

2020 ◽  
Author(s):  
Oswaldo Franca ◽  
Rogério Gonçalves dos Santos ◽  
Clayton Zabeu ◽  
Mario Martins
Keyword(s):  
Engine Emissions

SIMULTANEOUS REMOVAL OF ASTRAZONE BLUE AND LEAD ONTO LOW COST ADSORBENTS BASED ON POWER PLANT ASH

2011 ◽  
Vol 10 (3) ◽  
pp. 341-347 ◽  
Author(s):  
Maria Harja ◽  
Marinela Barbuta ◽  
Lacramioara Rusu ◽  
Corneliu Munteanu ◽  
Gabriela Buema ◽  
...  
Keyword(s):  
Power Plant ◽  
Low Cost ◽  
Simultaneous Removal ◽  
Power Plant Ash ◽  
Plant Ash
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