Analysis of Liquefied Methane Production Technology Depending on Methane Purity and Production Volume

Domashenko, A. M.; Dovbish, A. L.; Darbinyan, R. V.; Lyapin, A. I.; Peredel'skii, V. A.

doi:10.1023/b:cape.0000033665.68451.1c

Cited by 3 publications

(5 citation statements)

References 2 publications

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“…11 The LNG composition will depend on the quality specification, and is quite variable around the world, but in general the main components molar fractions vary in the ranges reported in Table 2. 5,6,[28][29][30][31][32][33] The present study focuses the attention on the influence of thermophysical properties on the coolant behavior. Therefore, only the major components, that could have an influence on the mixture thermophysical properties, have been considered, that is methane, ethane, propane and nitrogen.…”

Section: Lng Compositionsmentioning

confidence: 99%

“…In fact, the cost of the necessary production and handling technology that can provide the desired liquid methane composition up to get pure methane, must be taken into account. 4,5 The cheaper LNG has therefore been considered as a possible rocket engine fuel instead of pure methane. [6][7][8] In fact, due to the large amount of methane contained, LNG should have the same kind of advantages as methane.…”

Section: Introductionmentioning

confidence: 99%

“…Molar fraction (in percentage) of the species in different LNG mixtures.Table2. LNG composition range 5,6,[28][29][31][32][33] Grid convergence analysis: calculation of the spatial order of accuracy and Richardson extrapolation of the wall temperature T w in two streamwise stations x/D.…”

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confidence: 99%

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Numerical study of liquefied natural gas as a coolant in liquid rocket engines

Urbano

Nasuti

2012

Proceedings of the Institution of Mechanical Engineers, Part G:

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Liquefied natural gas is a suitable propellant to be used, together with liquid oxygen as oxidizer, in a liquid rocket engine, because of possible advantages with respect to hydrogen in specific applications. Often approximated as pure methane, liquefied natural gas is a mixture of methane, other heavier hydrocarbons and nitrogen. If is to be used in a regeneratively cooled liquid rocket engine, the knowledge of the thermodynamic and heat transfer characteristics when it flows in the cooling channels is of primary importance. The present study is carried out to understand how the composition can influence the flow in cooling channels. Results show that increasing ethane and propane content in a mixture, the pressure drop decreases but the coolant capability worsens. On the other hand increasing nitrogen content causes both poorer coolant capability and larger pressure drop

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Section: Lng Compositionsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Numerical study of liquefied natural gas as a coolant in liquid rocket engines

Urbano

Nasuti

2012

Proceedings of the Institution of Mechanical Engineers, Part G:

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“…The objective of the present study is to gain insights on the flame structure of the LNG/LOx mixtures and evaluate the real gas and fuel composition effects by means of a flamelet based a priori analysis. Thermo-physical properties of representative mixtures models of LNG [14,15], are evaluated and compared with those of pure methane at elevated pressures ranging from near-critical up to largely supercritical. In order to investigate the effect of LNG composition steady state flame structure characteristic are compared to those of the pure methane and LOx mixture, using a detailed chemical mechanism.…”

Section: Introductionmentioning

confidence: 99%

The effect of fuel composition on the non-premixed flame structure of LNG/LOx mixtures at supercritical pressure

Lapenna

Ciottoli

Creta

2016

54th AIAA Aerospace Sciences Meeting

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Methane and Liquefied Natural Gas (LNG) have been recently considered as propellants, together with cryogenic oxygen (LOx), for Liquid Rocket Engines (LRE) applications, having shown some advantages over the commonly used propellants.\ud In this framework the aim of the present study is to understand how the composition of LNG, with respect to the pure methane, can influence non-premixed combustion at typical LRE supercritical operating conditions. In the present work, the flame structures of LNG/LOx mixtures at supercritical pressures are investigated by means of a general fluid formulation for the unsteady laminar flamelet equations. Real fluid effects, which are commonly encountered in LRE thrust chambers because of high pressure pressure conditions, are taken into account by means of a comprehensive three-parameter cubic equation of state.\ud Flame structures are analyzed at elevated pressures ranging from near-critical up to largely supercritical, for pure methane and various representative mixtures models of LNG. The LNG/LOx steady state flame structure characteristics are found to show close similarities to those of the pure methane. On the other hand pollutants species, such as early stage soot precursors (i.e. acetylene), are found to be strongly dependent from LNG com- position. Sooting tendencies of LNG is further investigated with a more detailed chemical mechanism in order to shed light on Polycyclic Aromatic Hydrocarbons (PAH) presence at supercritical pressures. A single representative mixture for LNG composition is analyzed showing significantly larger production of soot precursors, such as benzene and naphthalene

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“…In fact, the cost of the necessary production and handling technology that can provide the desired liquid methane composition up to get pure methane, must be taken into account [4,5]. The cheaper LNG has therefore been considered as a possible rocket engine fuel instead of pure methane [6 8].…”

Section: Introductionmentioning

confidence: 99%

The influence of liquefied natural gas composition on its behavior as a coolant

Urbano

Nasuti

2013

Progress in Propulsion Physics

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Lique¦ed Natural Gas (LNG) is a suitable propellant to be used, together with liquid oxygen as oxidizer, in a liquid rocket engine, because of possible advantages with respect to hydrogen in speci¦c applications. Often approximated as pure methane, LNG is a mixture of methane, other heavier hydrocarbons and nitrogen. If LNG is to be used in a regeneratively cooled liquid rocket engine, the knowledge of the thermodynamic and heat transfer characteristics when it §ows in the cooling channels is of primary importance. The aim of the present work is to understand how the composition of LNG can in §uence the §ow in the cooling channels. A parametric study is carried out considering di¨er-ent LNG compositions and heat §ux levels. Attention is devoted to the pressure drop and cooling capabilities, which are the aspects that have to be controlled in a regenerative cooling system.

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Analysis of Liquefied Methane Production Technology Depending on Methane Purity and Production Volume

Cited by 3 publications

References 2 publications

Numerical study of liquefied natural gas as a coolant in liquid rocket engines

Numerical study of liquefied natural gas as a coolant in liquid rocket engines

The effect of fuel composition on the non-premixed flame structure of LNG/LOx mixtures at supercritical pressure

The influence of liquefied natural gas composition on its behavior as a coolant

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