Numerical Study of One Air-Fired and Two Oxy-Fuel Combustion Cases of Propane in a 100 kW Furnace

Al-Abbas, Audai Hussein; Naser, Jamal

doi:10.1021/ef201713h

Cited by 38 publications

(18 citation statements)

References 28 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This temperature over-prediction can be attributed to the absence of the intermediary species of CO in the reaction zone. The over-prediction of the temperature was similarly observed by Al-Abbas and Naser [54] in modeling a 100-kW furnace using the one-step global mechanism for propane.…”

Section: Temperature Profilesupporting

confidence: 67%

Numerical study of hydrogen-enriched methane-air combustion under ultra-lean conditions

Mokheimer

Sanusi

Habib

2016

Int. J. Energy Res.

View full text Add to dashboard Cite

SUMMARYThe demand for gas turbines that accept a variety of fuels has continuously increased over the last decade. Understanding the effects of varying fuel compositions on combustion characteristics and emissions is critical to designing fuel-flexible combustors. In this study, the combustion characteristics and emissions of methane and hydrogen-enriched methane were both experimentally and numerically investigated under ultra-lean conditions (Ø ≤ 0.5). This study was performed using global mechanisms with a one-step mechanism by Westbrook and Dryer and a two-step mechanism with an irreversible and reversible CO/CO 2 step (2sCM1 and 2sCM2). Results show that the 2sCM2 mechanism under-predicted the temperature, major species, and NO x by more than 100% under ultra-lean conditions; thus, we proposed a modified-2sCM2 mechanism to better simulate the combustion characteristics. The mechanisms of Westbrook, 2sCM1, and modified 2sCM2 predicted the temperature and the CO 2 emission with an average deviation of about 5% from the experimental values. Westbrook and 2sCM1, however, over-predicted the NO x emission by approximately 81% and 152%, respectively, as compared with an average under-prediction of 11% by the modified-2sCM2 mechanism. The numerical results using the proposed modified-2sCM2 mechanism shows that the presence of hydrogen in the fuel mixture inhibits the oxidation of methane that led to the formation of unburned hydrocarbons in the flame. We also showed that for any given fuel compositions of H 2 /CH 4 , there is an optimum equivalence ratio at which the pollutant emissions (CO and NO x ) from the combustor are minimal. Zero CO and 5 ppm NO x emissions were observed at the optimal equivalence ratio of 0.45 for a fuel mixture containing 30% H 2 . The present study provides a basis for ultra-lean combustion toward achieving zero emissions from a fuel-flexible combustor.

show abstract

Section: Temperature Profilesupporting

confidence: 67%

Numerical study of hydrogen-enriched methane-air combustion under ultra-lean conditions

Mokheimer

Sanusi

Habib

2016

Int. J. Energy Res.

View full text Add to dashboard Cite

show abstract

“…Also the used model is applicable without any changes or refinements on the reaction mechanism or model settings (see Refs. [18,51,53]). Similar EDC calculations with a 17 species mechanism were finished after 3 weeks on the same grid [23].…”

Section: Gas Saving Without Thermal Loadmentioning

confidence: 99%

“…The simulations were carried out with the EDC (eddy dissipation concept) model which is computationally demanding compared to the steady flamelet approach. Al-Abbas and Naser [51,52] conducted experiments and CFD simulations on a 100 kW propane-fired and coal-fired furnace. Air-fired and different oxyfuel cases with recycled flue gas were investigated.…”

Section: Introductionmentioning

confidence: 99%

Application of the steady flamelet model on a lab-scale and an industrial furnace for different oxygen concentrations

Prieler

Mayr

Demuth³

et al. 2015

Energy

View full text Add to dashboard Cite

“…These modifications of the combustion characteristics are due to the following reasons: the high specific heat capacity of CO 2 with respect to nitrogen in conventional combustion, radiative properties of gas mixtures, low oxygen molecular diffusivity in CO 2 compared to N 2 and other transport properties of the gas mixture such as viscosity, thermal diffusivity, gas phase chemistry etc. [1,3,[10][11][12].…”

Section: Oxy-fuel Combustion Capturementioning

confidence: 99%

“…In this section, an overview of the research program [10,11,51,52] will be briefly discussed. This research program can be classified to have two main objectives:…”

Section: Cfd Modelling Investigations On the Lab-scale And Large-scalmentioning

confidence: 99%

Oxy–Fuel Combustion in the Lab–Scale and Large–Scale Fuel– Fired Furnaces for Thermal Power Generations

Al-Abbas¹,

Naser²

2013

Thermal Power Plants - Advanced Applications

Self Cite

View full text Add to dashboard Cite

Additional information is available at the end of the chapter http://dx.doi.org/10.5772/55152 . IntroductionRecently, the environmental and health threat from anthropogenic emissions of greenhouse gases GHG of power plants has been considered as one of the main reasons for global climate change [ ]. The undesirable increase in global temperature is very likely because of increase the concentrations of these syngas in the atmosphere. The most important resource of these anthropogenic GHG emissions in the atmosphere is carbon dioxide emissions. At present, fossil fuels provide approximately % of the world's demand of electric energy [ ]. Many modern technologies in the electricity generation sector have been developed as sources of new and renewable energies. These new technologies include solar energy, wind energy, geothermal energy, and hydro energy. While these sources of renewable energy are often seen as having zero greenhouse gas emissions, the use of such technologies can be problematic. Firstly, sources of renewable energy are often still under development. Therefore, there can be a higher cost involved in their installation and in other related technical requirements. Secondly, the sudden switching of these energy sources zero emission has caused serious problems with the infrastructure of energy supply and global economy [ ]. In order to reduce the problem and obey the new environmental and political legislation against global warming, it is necessary to find an appropriate solution to cut pollution which is with cost-effective, from the energy sources. The most effective technique, which can achieve a high level of reduction in GHG emission to atmospheric zone, is to capture carbon dioxide from the conventional power generations. At present, several organizations, energy research centres, companies, and universities, particularly in developed countries, are working to develop these conventional power plants in order to make them more environmentally friendly, with near-zero emissions sources. This chapter continues on different CO capture technologies such as pre-combustion capture, post-combustion capture, and oxy-fuel combustion capture. The developments on

show abstract

Numerical Study of One Air-Fired and Two Oxy-Fuel Combustion Cases of Propane in a 100 kW Furnace

Cited by 38 publications

References 28 publications

Numerical study of hydrogen-enriched methane-air combustion under ultra-lean conditions

Numerical study of hydrogen-enriched methane-air combustion under ultra-lean conditions

Application of the steady flamelet model on a lab-scale and an industrial furnace for different oxygen concentrations

Oxy–Fuel Combustion in the Lab–Scale and Large–Scale Fuel– Fired Furnaces for Thermal Power Generations

Contact Info

Product

Resources

About