Applications of porous media combustion technology – A review

Mujeebu, M. Abdul; Abdullah, M. Z.; Bakar, Mohamad Zailani Abu; Mohamad, A. A.; Abdullah, M.K.

doi:10.1016/j.apenergy.2009.01.017

Cited by 275 publications

(82 citation statements)

References 77 publications

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“…Due to the direct gas-to-solid heat transfer, the thermal efficiency of regenerative heat transfer is higher. For this reason, regenerative oxidizers are usually the most appropriate devices to carry out methane combustion at low concentration [7][8][9].…”

Section: Introductionmentioning

confidence: 99%

A new method for controlling the ignition state of a regenerative combustor using a heat storage device

2014

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Regenerative oxidizers are very useful for combustion of methane-air lean mixtures (<1% vol. and as low as 0.15%), as those generated in coal mines (ventilation air methane, VAM). However, the performance of the oxidizer is unstable, leading to overheating or extinction, when methane concentration varies. We propose a new procedure for overcoming this problem, using the heat storage concept. Thus, this issue is addressed by proposing the use of an external sensible heat storage system, added to the regenerative oxidizer, capable of storing the excess of heat released in the oxidizer during rich concentration periods, and using it to heat the feed as needed during lean concentration periods. The performance of the heat storage system has been studied by simulating the behavior of a regenerative thermal oxidizer designed to operate at 0.25% vol. nominal feed methane concentration. It was found that the regenerative oxidizer, provided with the heat storage system together with a feedback controller that regulates the heat extracted/introduced in the oxidizers can operate satisfactory, dealing with the variations in methane concentration found in ventilations of coal mines.

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Section: Introductionmentioning

confidence: 99%

A new method for controlling the ignition state of a regenerative combustor using a heat storage device

2014

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“…However, in the case of lean gas mixtures, many studies found that CO emissions tended to be very low (Smucker and Ellzey, 2004;Mathis and Ellzey, 2005;Mujeebu et al, 2011). Previous studies have reported the applications of porous media burner technology in various fields (Mujeebu et al, 2009a;2009b), especially their use as radiant burners where a radiant efficiency of up to 40% was achieved (Howell et al, 1996) with lower pollutant emissions compared to swirl-stabilized combustor (Li et al, 2008). However, there are no reports of porous media burner technology being used in industrial regenerative burners.…”

Section: Introductionmentioning

confidence: 99%

Development of non-premixed porous inserted regenerative thermal oxidizer

Jun-chun

Cheng

Zheng

et al. 2013

J. Zhejiang Univ. Sci. A

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Abstract:In this study, a porous inserted regenerative thermal oxidizer (PRTO) system was developed for a 125 kW industrial copper-melting furnace, due to its advantages of low NO x emissions and high radiant efficiency. Zirconium dioxide (ZrO 2 ) ceramic foams were placed into the combustion zone of a regenerative thermal oxidizer (RTO). Different performance characteristics of the RTO and PRTO systems, including pressure drop, temperature distribution, emissions, and energy efficiency, were evaluated to study the effects of the porous inserts on non-premixed CH 4 combustion. It was found that the PRTO system achieved a significant reduction in the NO x emission level and a fuel saving of approximately 30% compared to the RTO system. It is most suitable for a lean combustion process at an equivalence ratio <0.4 with NO x and CO emission levels within 0.002%-0.003% and 0.001%-0.002%, respectively.

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“…Since energy saved is more precious than the energy generated, the demand for various efficient and eco-friendly energy management schemes to be implemented in the industrial, commercial and domestic sectors has become increasingly. (1) As conventional burner for residential boiler, Bunsen burner which can form separate and multiple flames at rich mixture condition has been widely used. Since multiple flames in a Bunsen burner are long and separate from each other, the temperature distribution at the flame tip region is not uniform.…”

Section: Introductionmentioning

confidence: 99%

Formation of Lean Premixed Surface Flame Using Porous Baffle Plate and Flame Holder

Lee

Hwang

2013

JTST

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A lean premixed surface flame has many advantages including low CO(Carbon Monoxide) and NOx(Nitrogen Oxide) emission and applicability of a small combustion volume leading to compact design. These advantages make it applicable to burner for condensing boilers with high thermal efficiency. Moreover recent severe regulation of global warming gas favored a lean premixed surface flame in development of a condensing boiler burner. This study focused on emission characteristics of lean premixed flame and the effect of flow distribution on flame stability of a surface flame in a cylindrical porous metal plate burner. For conceptual design of surface flame burner, the numerical calculation of a flow pattern inside the burner was performed and the calculated data were used for design of the burner system including the baffle plate and flame holder. The results show that the surface and stable premixed flame can be generated by implementing the proper baffle plate and flame holder. The surface cylindrical flame mode is changed into green flame, yellow radiation flame, blue flame and blow off with decreasing equivalence ratio. The blue flame has a wide stability region in the stability curve and showed the lowest CO and NOx emission at low equivalence ratio. And CO decreased as the mixture ratio became leaner but NOx showed almost the same emission level. For stability of a surface cylindrical flame, it was found to be very important to select the proper distribution of holes in a baffle plate and install the flame holder to prevent blow off at the rim of the cylindrical burner. NOx was measured below 6 ppm (0% oxygen base) from equivalence ratios 0.706 to 0.769 through the proper design of baffle plate and flame holder. CO which is a very important emission index in residential gas boiler was observed below 49.1ppm under the same equivalence ratio range.

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Applications of porous media combustion technology – A review

Cited by 275 publications

References 77 publications

A new method for controlling the ignition state of a regenerative combustor using a heat storage device

A new method for controlling the ignition state of a regenerative combustor using a heat storage device

Development of non-premixed porous inserted regenerative thermal oxidizer

Formation of Lean Premixed Surface Flame Using Porous Baffle Plate and Flame Holder

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