Experimental study of flammability limits of oxy-methane mixture and calculation based on thermal theory

Hu, Xianzhong; Yu, Qingbo; Sun, Nian X.; Qin, Qin

doi:10.1016/j.ijhydene.2014.03.202

Cited by 35 publications

(27 citation statements)

References 16 publications

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“…Several research works have been done to determine the flammability of oxy methane flames. With the addition of CO 2 , upper flammability decreases dramatically whereas it does not affect the lower flammability significantly [104]. An addition of steam also has an influence on the flammability limit of oxy combustion flame.…”

Section: Oxy-combustion Carbon Capturementioning

confidence: 99%

A Critical Review of CO2 Capture Technologies and Prospects for Clean Power Generation

2019

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With rapid growth in global demand for energy, the emission of CO2 is increasing due to the use of fossil fuels in power plants. Effective strategies are required to decrease the industrial emissions to meet the climate change target set at 21st Conference of the Parties (COP 21). Carbon capture and storage have been recognized as the most useful methods to reduce the CO2 emissions while using fossil fuels in power generation. This work reviews different methods and updates of the current technologies to capture and separate CO2 generated in a thermal power plant. Carbon capture is classified in two broad categories depending on the requirement of separation of CO2 from the gases. The novel methods of oxy combustion and chemical looping combustion carbon capture have been compared with the traditional post combustion and precombustion carbon capture methods. The current state of technology and limitation of each of the processes including commonly used separation techniques for CO2 from the gas mixture are discussed in this review. Further research and investigations are suggested based on the technological maturity, economic viability, and lack of proper knowledge of the combustion system for further improvement of the capture system.

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Section: Oxy-combustion Carbon Capturementioning

confidence: 99%

A Critical Review of CO2 Capture Technologies and Prospects for Clean Power Generation

2019

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“…Flammability limits are some of the main indices of fuel gases that must be known or determined to ensure safety during operation of industrial processes which involve the use and storage of flammable compounds [15]. They are used in the estimation of flame stability and explosion features of fuel gases [16].…”

Section: Properties Of Refrigerantsmentioning

confidence: 99%

Experimental study on the thermal performance of R600a, R290 and R600a/R290 mixtures in a retrofit R134a refrigeration system

Ramathe

Huan

Mwesigye

2015

2015 International Conference on the Industrial and Commercial Use of Energy (ICUE)

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Refrigeration systems play paramount roles in life quality of human beings and social development in terms of food security, environmental impact, and energy efficiency. The traditional CFC, HCFC, and HFC refrigerants have been in the process of phase-out and being replaced by the sustainable working fluids. In this paper, the experimental thermodynamic performance evaluation of the hydrocarbons R600a, R290 and their mixtures used in a vapour compression refrigeration system that utilizes R134a as a working fluid was carried out. Firstly, a theoretical analysis was developed to evaluate the feasibility of the retrofit by employing the vapour compression refrigeration cycle. The evaporation temperatures were ranging from -25 QC to 3 QC, and the condensation temperatures ranging from 25 QC to 65 QC with superheating and subcooling degrees constant at 5 QC. The thermodynamic and thermophysical properties were obtained using REFPROP software. Lastly, based on the results obtained from the theoretical analysis, the experimental comparison of the refrigeration cycle performance was conducted using a refrigeration system designed for R l34a.The results show that both pure R600a and R290 cannot be recommended as drop-in substitutes for R134a due to their significant differences in thermophysical properties. A mixture of R600alR290 500/0150% composition was found to be the most appropriate alternative refrigerant for the Rl34a system retrofit with a comparative thermal performance.

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“…At the same time some attempts have been focused on the VAFT. Hu [14] considered that the differences between the predictions and measurements at UFL were mainly due to the assumption of FAFT in his model. Palucis [15] also pointed out that a FAFT value could be related to the lower flammability limit (LFL), but this was not the case for UFL.…”

Section: Introductionmentioning

confidence: 99%

A new model based on adiabatic flame temperature for evaluation of the upper flammable limit of alkane-air-CO2 mixtures

Shu

Chen

et al. 2018

Journal of Hazardous Materials

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For security issue of alkane used in Organic Rankine Cycle, a new model to evaluate the upper flammability limits for mixtures of alkanes, carbon dioxide and air has been proposed in present study. The linear relationship was found at upper flammability limits between molar fraction of diluent in alkane-CO mixture and calculated adiabatic flame temperature. The prediction ability of the variable calculated adiabatic flame temperature model that incorporated the linear relationship above is greatly better than the models that adopted the fixed calculated adiabatic flame temperature at upper flammability limit. The average relative differences between results predicted by the new model and observed values are less than 3.51% for upper flammability limit evaluation. In order to enhance persuasion of the new model, the observed values of n-butane-CO and isopentane-CO mixtures measured in this study were used to confirm the validity of the new model. The predicted results indicated that the new model possesses the capacity of practical application and can adequately provide safe non-flammable ranges for alkanes diluted with carbon dioxide.

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Experimental study of flammability limits of oxy-methane mixture and calculation based on thermal theory

Cited by 35 publications

References 16 publications

A Critical Review of CO2 Capture Technologies and Prospects for Clean Power Generation

A Critical Review of CO2 Capture Technologies and Prospects for Clean Power Generation

Experimental study on the thermal performance of R600a, R290 and R600a/R290 mixtures in a retrofit R134a refrigeration system

A new model based on adiabatic flame temperature for evaluation of the upper flammable limit of alkane-air-CO2 mixtures

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