scholarly journals Gas Composition Effects in a CI Engine Converted to SI Natural Gas Operation

2017 ◽  
Author(s):  
Hemanth Kumar Bommisetty
Keyword(s):  
Natural Gas ◽  
Gas Composition ◽  
Composition Effects ◽  
Ci Engine

Fuel Composition Effects in a CI Engine Converted to SI Natural Gas Operation

2018 ◽  
Author(s):  
Hemanth Bommisetty ◽  
Jinlong Liu ◽  
Rahul Kooragayala ◽  
Cosmin Dumitrescu
Keyword(s):  
Natural Gas ◽  
Fuel Composition ◽  
Composition Effects ◽  
Ci Engine

Investigation of Natural Gas Composition Effects on Knock Phenomenon in SI Gas Engines Using Detailed Chemistry

2014 ◽  
Vol 493 ◽  
pp. 239-244 ◽  
Author(s):  
Ahmad Javaheri ◽  
Vahid Esfahanian ◽  
Ali Salavati-Zadeh ◽  
Mehdi Darzi ◽  
Seyyed Mojtaba Mirsoheil
Keyword(s):  
Natural Gas ◽  
Gas Composition ◽  
Detailed Chemistry ◽  
Composition Effects ◽  
Auto Ignition ◽  
Automobile Engines ◽  
Chemical Scheme ◽  
Equilibrium Calculations ◽  
Good Agreement

Considering the growing role of natural gas as an alternative fuel in stationary and automobile engines and the differences in its composition, the influence of natural gas composition on knocking combustion in spark ignition gas engines is studied both experimentally and by employing detailed chemistry. A SI single cylinder gas engine with variable compression ratio has been used for experimental observations. The chemical scheme is embedded into a zero-dimensional model which employ three-zone approach. The scheme is used to simulate the post-flame heat release and pre-flame auto-ignition. The reactions in burning zone are modeled by chemical equilibrium calculations. The simulated results are in good agreement with the experimental observations.

Modeling of Natural Gas Composition Effect on Low NOx Burners Operation in Heavy Duty Gas Turbine

2021 ◽  
Vol 143 (3) ◽  
Author(s):  
Serena Romano ◽  
Roberto Meloni ◽  
Giovanni Riccio ◽  
Pier Carlo Nassini ◽  
Antonio Andreini
Keyword(s):  
Natural Gas ◽  
Gas Turbine ◽  
Deep Understanding ◽  
Combustion Efficiency ◽  
Gas Composition ◽  
Gas Combustion ◽  
Annular Combustor ◽  
Heavy Duty Gas Turbine ◽  
Minimal Environmental Impact ◽  
The Impact

Abstract This paper addresses the impact of natural gas composition on both the operability and emissions of lean premixed gas turbine combustion system. This is an issue of growing interest due to the challenge for gas turbine manufacturers in developing fuel-flexible combustors capable of operating with variable fuel gases while producing very low emissions at the same time. Natural gas contains primarily methane (CH4) but also notable quantities of higher order hydrocarbons such as ethane (C2H6) can also be present. A deep understanding of natural gas combustion is important to obtain the highest combustion efficiency with minimal environmental impact. For this purpose, Large Eddy Simulations of an annular combustor sector equipped with a partially premixed burner are carried out for two different natural gas compositions with and without including the effect of flame strain rate and heat loss resulting in a more adequate description of flame shape, thermal field, and extinction phenomena. Promising results, in terms of NOx, compared against available experimental data, are obtained including these effects on the flame brush modeling, enhancing the fuel-dependency under nonadiabatic condition.

Pyrolysis of Natural Gas: Effects of Process Variables and Reactor Materials on the Product Gas Composition

2019 ◽  
Vol 42 (3) ◽  
pp. 690-698
Author(s):  
Steven Wang ◽  
Woo Jin Lee ◽  
Chao'en Li ◽  
Benny Kuan ◽  
Nick Burke ◽  
...  
Keyword(s):  
Natural Gas ◽  
Gas Composition ◽  
Process Variables ◽  
Product Gas ◽  
Reactor Materials

scholarly journals Catalytic production of low-carbon footprint sustainable natural gas

2022 ◽  
Vol 13 (1) ◽  
Author(s):  
Xiaoqin Si ◽  
Rui Lu ◽  
Zhitong Zhao ◽  
Xiaofeng Yang ◽  
Feng Wang ◽  
...  
Keyword(s):  
Natural Gas ◽  
Carbon Footprint ◽  
Biological Process ◽  
Total Carbon ◽  
Gas Composition ◽  
Low Carbon ◽  
Carbon Yield ◽  
Gas Products ◽  
Forestry Residues ◽  
Solid Biomass

AbstractNatural gas is one of the foremost basic energy sources on earth. Although biological process appears as promising valorization routes to transfer biomass to sustainable methane, the recalcitrance of lignocellulosic biomass is the major limitation for the production of mixing gas to meet the natural gas composition of pipeline transportation. Here we develop a catalytic-drive approach to directly transfer solid biomass to bio-natural gas which can be suitable for the current infrastructure. A catalyst with Ni2Al3 alloy phase enables nearly complete conversion of various agricultural and forestry residues, the total carbon yield of gas products reaches up to 93% after several hours at relative low-temperature (300 degrees Celsius). And the catalyst shows powerful processing capability for the production of natural gas during thirty cycles. A low-carbon footprint is estimated by a preliminary life cycle assessment, especially for the low hydrogen pressure and non-fossil hydrogen, and technical economic analysis predicts that this process is an economically competitive production process.

Downhole measurements and determination of natural gas composition using Raman spectroscopy

2019 ◽  
Vol 65 ◽  
pp. 25-31 ◽  
Author(s):  
K.M. Dąbrowski ◽  
Sz Kuczyński ◽  
J. Barbacki ◽  
T. Włodek ◽  
R. Smulski ◽  
...  
Keyword(s):  
Raman Spectroscopy ◽  
Natural Gas ◽  
Gas Composition ◽  
Downhole Measurements

Combustion characteristics of compressed natural gas/diesel dual-fuel turbocharged compressed ignition engine

2003 ◽  
Vol 217 (9) ◽  
pp. 833-838 ◽  
Author(s):  
Liu Shenghua ◽  
Zhou Longbao ◽  
Wang Ziyan ◽  
Ren Jiang
Keyword(s):  
Natural Gas ◽  
Ignition Delay ◽  
Combustion Characteristics ◽  
Operating Conditions ◽  
Dual Fuel ◽  
Compressed Natural Gas ◽  
Delay Effects ◽  
Low Load ◽  
Performance And Emissions ◽  
Ci Engine

The combustion characteristics of a turbocharged natural gas and diesel dual-fuelled compression ignition (CI) engine are investigated. With the measured cylinder pressures of the engine operated on pure diesel and dual fuel, the ignition delay, effects of pilot diesel and engine load on combustion characteristics are analysed. Emissions of HC, CO, NOx and smoke are measured and studied too. The results show that the quantity of pilot diesel has important effects on the performance and emissions of a dual-fuel engine at low-load operating conditions. Ignition delay varies with the concentration of natural gas. Smoke is much lower for the developed dual-fuel engine under all the operating conditions.

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