Numerical modelling of emissions of nitrogen oxides in solid fuel combustion

Bešenić, Tibor; Mikulčić, Hrvoje; Vujanović, Milan; Duić, Neven

doi:10.1016/j.jenvman.2018.03.014

Cited by 27 publications

(5 citation statements)

References 20 publications

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“…Fuel consumption and combustion is known to cause emissions of SO x and NO x which are harmful to the environment [ 1 , 2 ]. Consequently, regulations have been put in place to limit the amount of sulfur and nitrogen present in commercial fuels.…”

Section: Introductionmentioning

confidence: 99%

Ionic Liquid-Based Polyoxometalate Incorporated at ZIF-8: A Sustainable Catalyst to Combine Desulfurization and Denitrogenation Processes

et al. 2022

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An effective and sustainable process capable of simultaneously execute desulfurization and denitrogenation of fuels is in fact an actual necessity in the refinery industry. The key to achieve this goal is the parallel oxidation of sulfur and nitrogen compounds present in fuels, which is only achieved by an active and recovered catalyst. A novel heterogeneous catalyst was successfully prepared by the encapsulation of an imidazolium-based polyoxometalate (POM) into a ZIF-8 framework ([BMIM]PMo12@ZIF-8). This composite material revealed exceptional catalytic efficiency to concurrently proceed with the oxidative desulfurization and denitrogenation of a multicomponent model fuel containing various sulfur and nitrogen compounds. A complete removal of all these compounds was achieved after only one hour and the catalyst system was able to be reused for ten consecutive cycles without loss of efficiency. In fact, an ionic liquid POM was incorporated in the ZIF-8 for the first time, and this composite compound was originally applied as a catalyst for simultaneous oxidative desulfurization and denitrogenation processes.

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Section: Introductionmentioning

confidence: 99%

Ionic Liquid-Based Polyoxometalate Incorporated at ZIF-8: A Sustainable Catalyst to Combine Desulfurization and Denitrogenation Processes

et al. 2022

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“…44 Special attention has been given to the NO x and soot formation process. The Extended Zeldovich Model was employed for thermal NO emissions, 45 while a kinetic soot model was employed for the soot formation process. The prompt NO formation process in this work was calculated by employing the de Soete model, as in Cao et al 46 The method described in Vujanovi c et al 47 was used to determine the temperature fluctuations.…”

Section: Combustion and Pollutants Emission Modelingmentioning

confidence: 99%

Implementation of the spectral line‐based weighted‐sum‐of‐gray‐gases model in the finite volume method for radiation modeling in internal combustion engines

Jurić

Coelho

Priesching

et al. 2022

Intl J of Energy Research

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Summary It is well‐known that the pollutant formation processes and temperature distribution in various combustion systems that operate at high temperatures are influenced by radiation heat transport. Detailed modeling of radiation transport in internal combustion (IC) engines demands additional computational power, and hence the calculation of radiation phenomenon is not commonly applied in IC engines. At the same time, current operating conditions in IC engines consider high temperatures and recirculation of exhaust gases that enhance gas radiation. Therefore, the application of radiation models is needed to increase the correctness of radiative absorption, combustion characteristics, and the formation of pollutant emissions. In this paper, the implementation and validation of the spectral line‐based weighted‐sum‐of‐gray‐gases (SLW) model for calculating soot and gas radiation are performed. The SLW model is implemented in the computational fluid dynamics code AVL FIRE by programable user routines. The radiative transfer equation was calculated employing the finite volume method applicable for multiprocessing, moving meshes, and a mesh rezone procedure required for IC engine modeling. The validation of the SLW model is performed on one‐dimensional geometric cases that include analytical results of radiation intensity, for which agreement within 10% of the relative error was achieved. Additionally, the SLW model is applied to compression ignition engine simulations, where the obtained results are compared with the measured pressure and concentrations of NO and soot emissions. The calculated heat losses through the wall boundary layer were around 12% of the total fuel energy, approximately 9.5% of the total fuel energy was lost due to the convective flow. 7%–8% of convection heat loss was due to the higher emission than absorption of participating CO2 and H2O gasses, and the rest are net soot losses. For the observed operating cases, the computational time is increased nearly double for SLW model than in the simulation without radiation. Finally, the results calculated using SLW indicate an improved agreement with the experimental mean pressure, temperature, soot, and NO concentrations compared to simulations without radiation.

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“…With continuous population growth and rising standards, energy consumption is also increasing. Therefore, renewable energy sources such as geothermal energy [1], biomass [2], solar energy [3] and wind power [4] need to be used more. By generating clean energy from renewable sources, green energy buildings [5] can reduce their dependence on fossil fuels, which is crucial for mitigating climate change.…”

Section: Introductionmentioning

confidence: 99%

Analysis of Energy Consumption of a Thermo-Technical System with an Absorption Heat Pump

2024

Teh. vjesn.

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This paper discusses two different thermo-technical systems for heating and cooling the three-story office building under consideration. Data were collected on natural gas energy consumption over three-year period. The measured data on energy consumption for heating and cooling the building with an absorption heat pump using natural gas as fuel was analyzed. The only device that can replace the absorption heat pump in both the heating and cooling seasons is the vapor compression heat pump. The absorption heat pump has higher energy consumption than the vapor compression heat pump and its price is about 30% higher, but the financial cost of energy from natural gas is about 39% lower than the electricity cost of the vapor compression heat pump. The absorption heat pump is a better solution than the compression heat pump because the total financial costs, which include the investment costs and the energy costs over 20 years of operation, are about 9% lower and because the absorption heat pump heats up to an ambient temperature of -20 °C, which is not the case with the vapor compression heat pump.

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Numerical modelling of emissions of nitrogen oxides in solid fuel combustion

Cited by 27 publications

References 20 publications

Ionic Liquid-Based Polyoxometalate Incorporated at ZIF-8: A Sustainable Catalyst to Combine Desulfurization and Denitrogenation Processes

Ionic Liquid-Based Polyoxometalate Incorporated at ZIF-8: A Sustainable Catalyst to Combine Desulfurization and Denitrogenation Processes

Implementation of the spectral line‐based weighted‐sum‐of‐gray‐gases model in the finite volume method for radiation modeling in internal combustion engines

Analysis of Energy Consumption of a Thermo-Technical System with an Absorption Heat Pump

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