scholarly journals Natural Gas Fired Reciprocating Engines for Power Generation: Concerns and Recent Advances

10.5772/45992 ◽  
2012 ◽  
Author(s):  
Sreenath B. ◽  
Munidhar Biruduganti ◽  
Bipin Bihari ◽  
Raj Sekar
Keyword(s):  
Power Generation ◽  
Natural Gas ◽  
Recent Advances ◽  
Reciprocating Engines

Lean NOx Trap Catalysis for NOx Reduction in Natural Gas Engine Applications

2004 ◽  
Author(s):  
James E. Parks ◽  
H. Douglas Ferguson ◽  
Aaron M. Williams ◽  
John M. E. Storey
Keyword(s):  
Power Generation ◽  
Carbon Monoxide ◽  
Natural Gas ◽  
Nox Reduction ◽  
Lean Nox Trap ◽  
Nox Trap ◽  
Gas Engine ◽  
Natural Gas Engine ◽  
Reciprocating Engines ◽  
Lean Nox

Reliable power generation and distribution is a critical infrastructure for the public and industry. Large-bore spark-ignited natural gas reciprocating engines are a reliable source of power generation. Lean operation enables efficient operation, and engines can conveniently be placed wherever natural gas resources are located. However, stricter emission regulations may limit the installation and use of more natural gas reciprocating engines if emissions cannot be reduced. Natural gas engine emissions of concern are generally methane, carbon monoxide, and oxides of nitrogen (NOx). Methane and carbon monoxide can be controlled by oxidation catalysts; however NOx emissions are difficult to control in lean exhaust conditions. One method of reducing NOx in lean exhaust conditions is lean NOx trap catalysis. Lean NOx trap technologies (also known as NOx adsorber catalysts, NOx storage and reduction catalysts, etc.) have demonstrated >90% NOx reduction for diesel reciprocating engines and natural gas turbines. In the work presented here, the feasibility of a lean NOx trap catalyst for lean burn natural gas reciprocating engines will be studied. Tests were conducted on a Cummins 8.3-liter engine on a dynamometer. The lean Nox trap catalyst was controlled in a valved exhaust system that utilized natural gas as the catalyst reductant. Oxidation and reformer catalysts were used to enhance utilization of methane for catalyst regeneration. The feasibility of this approach will be discussed based on the observed NOx reduction and associated fuel penalties.

Survey of Gas Engine Performance and Future Trends

2003 ◽  
Author(s):  
Timothy J. Callahan
Keyword(s):  
Power Generation ◽  
Natural Gas ◽  
High Efficiency ◽  
Engine Performance ◽  
Exhaust Emission ◽  
Nox Emissions ◽  
Gas Engine ◽  
Natural Gas Engines ◽  
Reciprocating Engines ◽  
Performance And Emissions

Worldwide, reciprocating engines play a major role in power generation. Many of the reciprocating engines are diesel engines used as stand-by generators, but increasingly, natural gas engines are providing distributed base load generation and finding service in combined heat and power applications. The economics of power generation continues to place a premium on engine efficiency while environmental regulators continue to legislate lower and lower exhaust emission levels, specifically NOx emissions. NOx emissions and efficiency tend to be proportional, so while not mutually exclusive, low NOx and high efficiency are difficult to obtain simultaneously. In spite of the NOx-efficiency relationship, natural gas engines are more efficient with lower emissions today than in the past and the trend toward higher efficiency will continue in the future. This paper surveys current natural gas engine performance and emissions and projects future engine performance. This paper also introduces the ARES and ARICE programs for developing revolutionary technology for high efficiency and low emissions.

Life Cycle Analysis of Natural Gas Extraction and Power Generation

2019 ◽  
Author(s):  
James Littlefield ◽  
Selina Roman-White ◽  
Dan Augustine ◽  
Ambica Pegallapati ◽  
George G. Zaimes ◽  
...  
Keyword(s):  
Power Generation ◽  
Life Cycle ◽  
Natural Gas ◽  
Life Cycle Analysis ◽  
Gas Extraction ◽  
Natural Gas Extraction

scholarly journals Status and prospects of the decentralised valorisation of natural gas into energy and energy carriers

2021 ◽  
Author(s):  
Guido Zichittella ◽  
Javier Pérez-Ramírez
Keyword(s):  
Natural Gas ◽  
Catalyst Design ◽  
Liquefied Natural Gas ◽  
Energy Carriers ◽  
Recent Advances ◽  
Fuels And Chemicals

We critically review the recent advances in process, reactor, and catalyst design that enable process miniaturisation for decentralised natural gas upgrading into electricity, liquefied natural gas, fuels and chemicals.

scholarly journals Increasing the efficiency of using the natural gas potential energy in turbo-expander units for power generation

2021 ◽  
Author(s):  
Sergey Osipov ◽  
Olga Zlyvko ◽  
Nikolay Bychkov ◽  
Daria Kharlamova ◽  
Arkadiy Zaryankin
Keyword(s):  
Power Generation ◽  
Natural Gas ◽  
Potential Energy ◽  
Turbo Expander ◽  
Gas Potential

scholarly journals Catalytic Oxidation of Methane

Catalysts ◽  
2021 ◽  
Vol 11 (8) ◽  
pp. 944
Author(s):  
Anil C. Banerjee
Keyword(s):  
Power Generation ◽  
Natural Gas ◽  
Catalytic Oxidation ◽  
Energy Sources ◽  
Oxidation Of Methane

Methane (the major component of natural gas) is one of the main energy sources for gas-powered turbines for power generation, and transport vehicles [...]

Predicting Flameholding for Hydrogen and Natural Gas Flames at Gas Turbine Premixer Conditions

2016 ◽  
Vol 138 (12) ◽  
Author(s):  
Elliot Sullivan-Lewis ◽  
Vincent McDonell
Keyword(s):  
Power Generation ◽  
Natural Gas ◽  
Gas Turbine ◽  
Gas Turbines ◽  
Experimental Studies ◽  
Temperature Variations ◽  
Auto Ignition ◽  
Chamber Temperature ◽  
Transient Events ◽  
Significant Effort

Lean-premixed gas turbines are now common devices for low emissions stationary power generation. By creating a homogeneous mixture of fuel and air upstream of the combustion chamber, temperature variations are reduced within the combustor, which reduces emissions of nitrogen oxides. However, by premixing fuel and air, a potentially flammable mixture is established in a part of the engine not designed to contain a flame. If the flame propagates upstream from the combustor (flashback), significant engine damage can result. While significant effort has been put into developing flashback resistant combustors, these combustors are only capable of preventing flashback during steady operation of the engine. Transient events (e.g., auto-ignition within the premixer and pressure spikes during ignition) can trigger flashback that cannot be prevented with even the best combustor design. In these cases, preventing engine damage requires designing premixers that will not allow a flame to be sustained. Experimental studies were conducted to determine under what conditions premixed flames of hydrogen and natural gas can be anchored in a simulated gas turbine premixer. Tests have been conducted at pressures up to 9 atm, temperatures up to 750 K, and freestream velocities between 20 and 100 m/s. Flames were anchored in the wakes of features typical of premixer passageways, including cylinders, steps, and airfoils. The results of this study have been used to develop an engineering tool that predicts under what conditions a flame will anchor, and can be used for development of flame anchoring resistant gas turbine premixers.

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