Existing compression ignition engines can be modified to spark ignition configuration to increase the use of natural gas in the heavy-duty transportation sector. A better understanding of the premixed natural gas combustion inside the original diesel…
An analysis of the literature on the use of natural gas shows a significant increase in the number of natural gas-powered vehicles, both in road and sea transport, and diesel-fueled vehicles adapted to run on natural gas. Due to its combustion…
Natural gas (NG) is an alternative combustible fuel for the transportation sectors due to its clean combustion, small carbon footprint, and, with recent breakthroughs in drilling technologies, increased availability and low cost. Currently, NG is…
With environmental concerns and limited natural resources, there is a need for cleaner sources of energy in the transportation sector. Renewable natural gas (RNG) is being considered as a potential fuel for heavy-duty applications due to its…
Increasing the natural gas (NG) use in heavy-duty engines is beneficial for reducing greenhouse-gas emissions from power generation and transportation. However, converting compression ignition (CI) engines to NG spark ignition operation can increase…
To quantitatively analyze the effects of coupling port water injection (PWI) and exhaust gas recirculation (EGR) on the spray water evolution, combustion and emissions for the stoichiometric natural gas engines, five cases were tested on the…
Converting existing compression ignition engines to spark ignition approach is a promising approach to increase the application of natural gas in the heavy-duty transportation sector. However, the diesel-like environment dramatically affects the…
One of the main environmental problems in oil production in the world today is the utilization of associated petroleum gas (APG) by combustion it in flares. At the same time, this process has enormous economic damage, since APG is a potential raw…
Recently, safety protection research on the risk of flammable gas leakage and deflagration between adjacent offshore facilities is easy to be ignored and the fire and explosion accidents are also harmful to interactive operations, causing great…
Pilot ignited direct injection natural gas engines have been increasingly attractive owing to their advantages in thermal efficiency and emissions. For conventional pilot ignited direct injection natural gas engines, soot emissions have been…
Jurisdictions are looking into mixing hydrogen into the natural gas (NG) system to reduce greenhouse gas (GHG) emissions. Earlier studies have focused on well-to-wheel analysis of H2 fuel cell vehicles, using high-level estimates for…
With the rapid development of the world economy, the petrochemical industry energy reserve strategy and production demand increase, petrochemical storage tank farm scale is also expanding, and continue to large, intensive direction of development. In…
In view of the increasing restrictions for CO2 mitigation, the evaluation of alternative fuels to ensure sustainability of transportation is becoming increasingly important. Since some of these alternatives can be refined from renewable sources, they…
The accidental gas explosions are major safety concerns in the oil and gas sectors. A typical gas explosion associates with complex interaction between obstacles and turbulence. Compared to the gas explosion, the chemical explosion such as TNT…
In situ combustion (ISC) plays a significant role in the exploitation of heavy crude oil. In this study, the thermal behaviors and kinetics of combustion of heavy crude oil and its saturates-aromatics-reins-asphaltenes (SARA) fractions were…
This paper studies experimentally the burning behavior of crude karanja oil pool fires in free burning. Experiments were conducted in pool size from 0.2 to 0.5 m. Various parameters such as mass loss rate, flame height, centerline temperature, and…
Pressurized Chemical Looping Combustion (PCLC) is a promising technology for mitigating CO2 emission from fossil fuel combustion. This work investigates the oxidation kinetics of a natural ilmenite ore to assess the PCLC of natural gas since process…
Heavy-duty compression-ignition (CI) engines converted to natural gas (NG) operation can reduce the dependence on petroleum-based fuels and curtail greenhouse gas emissions. Such an engine was converted to premixed NG spark-ignition (SI) operation…
The soot emissions from internal combustion engines have significant health and environmental impacts and, as such, are subject to increasingly stringent regulations. Two-color pyrometry provides the in-cylinder soot cloud temperature and soot volume…
Present study deals with the effect of enrichment with H2 on the laminar burning velocity (LBV) and flame stability of various multicomponent NGair mixtures. In the present work, constant pressure outwardly propagating spherical flame method is used…
Diesel engines have been widely used due to the higher reliability and superior fuel conversion efficiency. However, they still generate significant amount of carbon dioxide (CO2) and particulate matter (PM) emissions. Natural gas is a low carbon and…
One of the most problematic aspects of gas-fired furnaces is their poor luminosity and radiative characteristics which are directly affected by the carbon percent of the fuel molecules. This study investigates the soot content, flame temperature, and…
The present work is an experimental investigation that aims at studying the effects of different fuel additives on the soot volume fraction and temperature in a well-defined vertical laminar diffusion flame configuration, and these additives include…
Reformer gas (syngas) addition to main fuel is a practical solution for combustion timing control in HCCI engines. This study emphasizes the understanding of various effects of reformer gas (RG) addition, with composition of 75%vol H2 and 25%vol CO,…
Numerical optimization of nitrogen oxides (NOx) formation is an essential factor during developing low pollution combustor of gas turbine. The Computational Fluid Dynamics-Chemical Reactor Network (CFD-CRN) hybrid method has a great advantage in fast…
The aim of this study is to apply the artificial neural network to identify the mathematical model of the combustion of a reactivity-controlled compression ignition (RCCI) engine fueled with natural gas and diesel oil. In this study, a…
In this research, a newly proposed method combining Chemkin with CONVERGE was used to study the transient in-cylinder chemical reaction process in NG-diesel dual fuel engine. The selected mechanism was verified by comparing the results of CONVERGE…
The aim of this study is to implement the multi-inputmulti-output optimization of reactivity-controlled compression-ignition combustion in a heavy-duty diesel engine running on natural gas and diesel fuel. A single-cylinder heavy-duty diesel engine…
Heavy-duty compression-ignition (CI) engines converted to natural gas (NG) operation can reduce the dependence on petroleum-based fuels and curtail greenhouse gas emissions. Such an engine was converted to premixed NG spark-ignition (SI) operation…
The present work concerns the study of rich laminar premixed CH4/C2H6/C3H8/O2/N2 flames operating at two equivalence ratios ( = 1.66 and 2.05) and low pressure (80 Torr). In the case of the flame = 2.05, the influence of pressure was studied between…
Countries are under increasing pressure to reduce greenhouse gas emissions as an act upon the Paris Agreement. The essential emission reductions can be achieved by environmentally friendly solutions, in particular, the introduction of low carbon or…
Combustion characteristics of palm biodiesel/methyl esters (PME) and natural gas (NG) blend were examined using a model gas turbine swirl burner at vane angle () 30, 45 and 60. A twin fluid air blast atomiser was utilised for atomising liquid fuel at…
Technology developments in directional drilling and hydraulic fracturing have led to increased natural gas reserves. Development of these unconventional resources is an energy intensive process. Prime-movers of unconventional well development were…
The aim of this work is to investigate and improve the understanding of the complex processes involved in NOx formation during oxy-fuel combustion of natural gas. In this study, two industrial non-premixed jet burner designs were experimentally and…
A parametric study on some combustion characteristics was carried out in a natural gas fueled dual plugs SI engine. Mass fraction burned, cylinder pressure histories and combustion durations of the engine were investigated by three equivalence ratio…
In order to propose the control strategies based on exergy to realize efficient and energy-saving operation of the engine, the energy and exergy balance under sensitive boundary conditions were analyzed with the first and second laws of…
A CFD methodology to model natural gas Light-Duty SI (Spark-Ignition) engines is here proposed. The ignition stage is modeled by means of a simplified Eulerian spherical kernel approach (deposition model). Then, the fully turbulent flame propagation…
A combustor was developed to operate with natural gas and air as the primary propellants at elevated chamber pressures and air preheat temperatures representative of land-based power generation gas turbine engines. Detonation dynamics were studied to…
This paper examines the hydrogen production from the combustion of rich natural gas-air mixtures in a porous medium composed of aleatoric algae biomass particles and alumina spheres. Combustion wave temperature, propagation rate and products (H2, CO,…
This paper investigated the hydrogen enriched methane/air flames diluted with CO2. The turbulent premixed flame was stabilized on a Bunsen type burner and the two dimensional instantaneous OH profile was measured by Planar Laser Induced Fluorescence…
The mass fraction burned (MFB) of the gas mixture in combustion process as the function of the combustion duration time, reflects the percentage of fuel consumed at the every moment in the combustion process, and is an important factor for analysing…
In a gas turbine rig featuring combustion staging, staged operation was achieved under steady state operation. The secondary combustion stage is a single transverse jet of premixed natural gas fuel injected into an accelerated vitiated confined…
The aim of this study is to investigate the detailed soot formation characteristics of crude Jatropha oil (CJO) and heavy fuel oil (HFO) blends (lower heating value (LHV) basis: 50%/50%) in a 550 kW-class combustion test furnace equipped with an…
The Paris agreement is exerting pressure on industries that generate significant greenhouse gas (GHG) emissions, such as transportation. Electrification can help reduce GHG emissions from light duty vehicles, but it is unfeasible for heavy duty…
The constant-volume combustion vessel and CHEMKIN PRO software were employed to investigate the effect of component variation of natural gas on the laminar burning velocity and flame instability at the ambient temperature and pressure and…
Converting existing diesel engines to the spark ignition (SI) operation can increase the utilization of natural gas (NG) in heavy-duty applications, which can reduce oil imports in the US and curtail greenhouse-gas emissions. The NG operation at…
The use of natural gas (NG) in heavy-duty internal combustion engines can reduce the dependence on petroleum fuels and greenhouse gas emissions. Diesel engines can convert to NG spark ignition (SI) by installing a high-energy ignition system and a…
Partial conversion of the large inventory of compressionignition engines to natural-gas (NG) spark-ignition lean-burn operation can reduce U.S. dependence on imported petroleum and enhance national energy security. This paper describes some of the…
GT-Power based closed-loop model of a liquefied natural gas(LNG)engine with a reformer was built to explore the effect of reformed exhaust gas recirculation(REGR) rate and n(the volume fraction ratio of CH4 to O2)on performances of the engine and the…