Measurement of the Hydrocarbon Dew Point of Real and Synthetic Natural Gas Mixtures by Direct and Indirect Methods

2009 ◽  
Vol 23 (3) ◽  
pp. 1640-1650 ◽  
Author(s):  
Andrew S. Brown ◽  
Martin J. T. Milton ◽  
Gergely M. Vargha ◽  
Richard Mounce ◽  
Chris J. Cowper ◽  
...  
Keyword(s):  
Natural Gas ◽  
Gas Mixtures ◽  
Dew Point ◽  
Indirect Methods ◽  
Synthetic Natural Gas ◽  
Direct And Indirect Methods

scholarly journals ANALYSIS OF METHODS AND MEASURES OF MEASUREMENT OF HEAT OF COMBUSTION OF NATURAL GAS IN UKRAINE AND ABROAD

2019 ◽  
pp. 78-87
Author(s):  
K. M. Shynkaruk
Keyword(s):  
Natural Gas ◽  
Calorific Value ◽  
Energy Performance ◽  
Heat Of Combustion ◽  
Indirect Methods ◽  
Global Trends ◽  
The Relationship ◽  
Direct And Indirect Methods ◽  
Qualitative Characteristics

In connection with the increase in prices for natural gas, the urgent issue is to calculate not only the amount of gas consumed, but also its quality precisely with the consumer. The quality of gas is the compliance of its physicochemical parameters with established regulatory documents. With the current gas accounting and payment system in Ukraine, consumers using the same number of cubic meters receive different heat of combustion. The paper analyzes the regulatory framework for assessing the energy performance of natural gas. The necessity of the transition to accounting for natural gas in energy units is substantiated. Existing methods and means for determining the calorific value of natural gas that are used in Ukraine and abroad are considered. Currently, direct and indirect methods are used to determine the calorific value of natural value of natural gas. The most common is the calculation method based on chromatographic analysis, the implementation of which requires expensive equipment. Other methods for determining the calorific value of natural gas is correlation. The essence of which is to establish the relationship between a certain physicochemical property of natural gas and calorific value, which can be established by experimental observations and based on theoretical analysis, which makes it possible to draw a conclusion about the calorific value of natural gas. Based on the analysis, it was found that currently there are no simple in design and not expensive means of controlling the qualitative characteristics of natural gas commercially available. Therefore, it is relevant to solve the problem of operational control of the quality of natural gas, through scientific justification, development and improvement of tools that enable the indirect accounting of the energy value of natural gas in accordance with global trends in energy accounting. A correlation analysis was carried out to establish the relationship between the thermal conductivity and the calorific value of natural gas. The use of the thermocatalytic method for determining the calorific value of gas is proposed, which will allow designing a relatively cheap and easy-to-use device for monitoring the quality of natural gas specifically for the consumer.

Measurement and prediction of dew point curves of natural gas mixtures

2012 ◽  
Vol 334 ◽  
pp. 1-9 ◽  
Author(s):  
Vasiliki Louli ◽  
Georgia Pappa ◽  
Christos Boukouvalas ◽  
Stathis Skouras ◽  
Even Solbraa ◽  
...  
Keyword(s):  
Natural Gas ◽  
Gas Mixtures ◽  
Dew Point

Measurement of H–LW–V and Dissociation Enthalpy of Carbon Dioxide Rich Synthetic Natural Gas Mixtures

2014 ◽  
Vol 59 (11) ◽  
pp. 3502-3509 ◽  
Author(s):  
Khalik M. Sabil ◽  
Qazi Nasir ◽  
Bezhad Partoon ◽  
Akbar A. Seman
Keyword(s):  
Carbon Dioxide ◽  
Natural Gas ◽  
Gas Mixtures ◽  
Synthetic Natural Gas ◽  
Dissociation Enthalpy

Isothermal PρT measurements on Qatar’s North Field type synthetic natural gas mixtures using a vibrating-tube densimeter

2012 ◽  
Vol 53 ◽  
pp. 1-8 ◽  
Author(s):  
Mert Atilhan ◽  
Santiago Aparicio ◽  
Ferdi Karadas ◽  
Kenneth R. Hall ◽  
Rafael Alcalde
Keyword(s):  
Natural Gas ◽  
Gas Mixtures ◽  
Synthetic Natural Gas ◽  
Field Type ◽  
Vibrating Tube Densimeter

Viscosity Measurements and Data Correlation for Two Synthetic Natural Gas Mixtures

2010 ◽  
Vol 55 (7) ◽  
pp. 2498-2504 ◽  
Author(s):  
Mert Atilhan ◽  
Santiago Aparicio ◽  
Rafael Alcalde ◽  
Gustavo A. Iglesias-Silva ◽  
Mahmoud El-Halwagi ◽  
...  
Keyword(s):  
Natural Gas ◽  
Gas Mixtures ◽  
Data Correlation ◽  
Synthetic Natural Gas ◽  
Viscosity Measurements

scholarly journals Comparative Study of Equations of State for the Dew Curves Calculation in High Pressure Natural Gas Mixtures. [Estudio Comparativo de Ecuaciones de Estado para el Cálculo de Curvas de Rocío en Mezclas de Gas Natural a Alta Presión]

2018 ◽  
Vol 11 (1) ◽  
pp. 152-164
Author(s):  
Natalia Prieto Jiménez ◽  
Germán González Silva
Keyword(s):  
Experimental Data ◽  
Natural Gas ◽  
High Pressures ◽  
Equations Of State ◽  
Absolute Error ◽  
Gas Mixtures ◽  
Synthetic Natural Gas ◽  
Gas Processing ◽  
Processing Plants ◽  
Correct Estimation

he success during the operation of natural gas processing plants depends on the correct estimation of thermodynamic properties of the system. This paper calculates the equilibrium curves of real and synthetic natural gas mixtures means of three Equations of State (EOS). These equilibrium curves were constructed and compared with experimental data found in the literature covered. The results showed that, above 4 MPa the Peng-Robinson equation presented a considerable deviation with respect to the experimental data, reaching an absolute error of 4.36%; therefore, the GERG2008 equation is recommended for systems that operate at high pressures when the components present in the mixture apply.Keywords:Gas Mixtures, Dew curves, Equations of State; Peng-Robinson, Soave-Redlich-Kwong, GERG2008.ResumenEl éxito durante la operación de plantas de tratamiento de gas natural depende de la correcta estimación de las propiedades termodinámicas del sistema. Este artículo calcula las curvas de equilibrio de mezclas de gas natural reales y sintéticas por medio de tres ecuaciones de estado (EOS). Estas curvas de equilibrio fueron construidas y comparadas con datos experimentales presentes en la literatura. Los resultados mostraron que, por encima de 4 MPa la ecuación de Peng-Robinson presentó una desviación considerable con respecto a los datos experimentales, alcanzando un error absoluto de 4,36%; por lo cual se recomienda la ecuación de GERG2008 para sistemas que operen a altas presiones cuando los componentes presentes en la mezcla apliquen.Palabras clave:  Mezclas de gas, Curvas de rocío, Ecuaciones de estado, Peng-Robinson, Soave-Redlich-Kwong, GERG2008.ResumoO sucesso na operação de usinas de tratamento de gás natural depende da correta estimação das propriedades termodinâmicas do sistema. Este artigo calcula as curvas de equilíbrio de misturas de gás natural reais e sintéticas por meio de três equações de estado (EOS). As curvas de equilíbrio foram construídas e comparadas com dados experimentais presentes na literatura. Os resultados mostraram que, acima de 4 Mpa a equação de Peng-Robinson apresentou um desvio considerável em relação aos dados experimentais, atingindo um erro absoluto de 4,36%; por tanto, é recomendável a equação de GERG2008 para sistemas que operam em alta pressão quando os componentes presentes no sistema apliquem.Palavras-chave:Misturas de gás, Curvas de orvalho, Equações de estado, Peng-Robinson, Soave-Redlich-Kwong, GERG2008. 

scholarly journals ANALYSIS OF THE PROCESS OF WATER VAPOR CONDENSATION WITHIN GAS ATMOSPHERES AND COMBUSTION PRODUCTS

2017 ◽  
pp. 3-18 ◽  
Author(s):  
B.S. Soroka ◽  
V.V. Horupa
Keyword(s):  
Water Vapor ◽  
Relative Humidity ◽  
Natural Gas ◽  
Saturation Temperature ◽  
Combustion Products ◽  
Gas Mixtures ◽  
Vapor Condensation ◽  
Dew Point ◽  
Saturation State ◽  
Gas Combustion

Water vapor is the most important working medium by the processes of energy generation and conversion. The H2O content in gases and gas mixtures serves as a standard of their desiccation by technological processes. The presence of vapor in the air-oxidizer provides a reduction of harmful substances formation by combustion. The values characterizing the saturation state: the dew point tdew and the wet bulb thermometer twb temperature are used to evaluate an approximation degree of the wet gas system (any air, gas mixtures or combustion products) to the condensation state. The values of these parameters have been determined for moist air in dependence on the basic temperature and the relative humidity of an air. The lower are the temperature values tdew, twb, the wider is the region of H2O existence in the vapor phase. The EUROSTAT’s gas fuels list includes the natural gas (NG), blast furnace gas (BFG), coke oven gas (COG). Calculations of dew point values of the combustion products for the gas fuels: NG, COG, BFG has been carried out in dependence on the characteristics of the combustion air: the oxidizer excess factor l, the temperature ta and the relative humidity ja. The dew point tdew values have been found under standard conditions for the combustion products of the listed gas fuels, presented by stoichiometric (l = 1.0) mixtures with dry air: pure methane, NG, COG, BFG. The tdew values make — respectively 59.3; 58.5; 11.1; 61.5. In the case of saturated air as an oxidizer at temperature of 25 °C, the dew point for the combustion products of the listed fuels makes the folloving values: 62.0; 61.5; 25.6; 64.0 °C respectively. The fractions of H2O in the vapor and liquid phases of natural gas combustion products are determined as a function of temperature by condition that the 100 % content of H2O in from of vapor state (without water) corresponds to the saturation temperature (or dew point).This temperature has value of about 60°C for combustion products under stoichiometric air/gas ratio. Bibl. 31, Fig. 10, Tab. 3.

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