Application of lean flammability limit study and large eddy simulation to burner development for an oxy-fuel combustion system

Taniguchi, Masayuki; Yamamoto, Kenji; Okazaki, Teruyuki; Rehfeldt, Sebastian; Kuhr, Christian

doi:10.1016/j.ijggc.2011.05.008

Cited by 14 publications

(17 citation statements)

References 18 publications

(52 reference statements)

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“…Numerical analyses were first applied to evaluate heat absorption by the furnace wall [19], since then they have been applied to such environmental performance factors as NOx emission [20,21] and to control furnace wall corrosion [22]. Evaluation of flame stability, such as prediction of blow-off limit, is possible, but, this evaluation is relatively difficult [23,24]. Figure 2 shows the temperature distribution (a) and streamlines (b) in a burner neighborhood.…”

Section: Ignition and Flame Propagation Phenomena For Pulverized Coalmentioning

confidence: 99%

“…The lean flammability limit of solid fuels is related to the pyrolysis rates and the amount of pyrolized fuel [24]. The lean flammability limit can also be evaluated by using pyrolysis experiments.…”

Section: Effects Of Experimental Conditions On Flame Propagation Perfmentioning

confidence: 99%

“…Examples of pyrolysis calculations for various fuels are shown in Fig.10. The calculation method has been shown elsewhere [24,25]. The relationship between heating time and amount of pyrolized volatile matter was calculated when the particle was heated at a rate of 20000K/s.…”

Section: Effects Of Experimental Conditions On Flame Propagation Perfmentioning

confidence: 99%

“…The relationship between heating time and amount of pyrolized volatile matter was calculated when the particle was heated at a rate of 20000K/s. The distributed activation energy model (DAEM) was used for the pyrolysis [24][25][26][27][28][29]. The pyrolysis rate dV/dt was calculated by Eq.…”

Section: Effects Of Experimental Conditions On Flame Propagation Perfmentioning

confidence: 99%

“…For oxy-fuel combustion, oxygen concentration should be increased to around 30%, in order to secure the same ignition performance as air combustion. Based on these fundamental results, we developed the model to predict both flame propagation velocity and lean flammability limit [11,24]. Verification examples are shown in Fig.…”

Section: Wwwintechopencommentioning

confidence: 99%

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Section: Ignition and Flame Propagation Phenomena For Pulverized Coalmentioning

confidence: 99%

Section: Effects Of Experimental Conditions On Flame Propagation Perfmentioning

confidence: 99%

Section: Effects Of Experimental Conditions On Flame Propagation Perfmentioning

confidence: 99%

Section: Effects Of Experimental Conditions On Flame Propagation Perfmentioning

confidence: 99%

Section: Wwwintechopencommentioning

confidence: 99%

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2012

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Oxyfuel Combustion for CO ₂ Capture

Yan

2015

Handbook of Clean Energy Systems

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Oxyfuel combustion is one of the technologies for carbon dioxide ( CO 2 ) capture and storage ( CCS ) in fossil‐fuel‐based power systems to mitigate global greenhouse gas ( GHG ) emissions. When introducing oxyfuel combustion into the power systems, physical and chemical processes of the combustion differ from conventional combustion, and the energy penalty for CCS has significant impacts on the system operation and performance, similar to combustion process, heat transfer, flue gas properties, and emission control. Around these topics, dozens of oxyfuel‐related projects were launched within this decade in the worldwide, and many techno‐economic assessments for oxyfuel technology including competitive technologies (pre‐/post‐combustion and emerging technologies) are continuously being published. Although the technologies for oxyfuel combustion are relatively well understood today, it is only investigated experimentally in lab and pilot‐scale combustion equipment. The estimated costs of electricity and CO 2 avoidance costs are varied by uncertainties from economical assessments from different referenced databases and from restricted regulation of different countries and regions. Therefore, all addressed issues must be clarified and proved to be feasible deployment for the commercial scale CCS plants to cope with emission targets according to Copenhagen Accord to reduce GHG emission and mitigate world temperature rising.

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Ignition behavior of coal and biomass blends under oxy-firing conditions with steam additions

Riaza

Álvarez

Gil

et al. 2013

Greenhouse Gas Sci Technol

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The ignition behavior of coal and biomass blends was assessed in air and oxy-fi ring conditions in an entrained fl ow reactor. Four coals of different rank, an anthracite, a semi-anthracite, and two high-volatile bituminous coals, were tested in air and O 2 /CO 2 (21-35% O 2 ) environments. For all the coals, deterioration in ignition properties was observed in the 21%O 2 /79%CO 2 atmosphere in comparison with air. However, the ignition properties were enhanced when the oxygen concentration in the O 2 /CO 2 mixture was increased. Coal and biomass blends of a semi-anthracite and a highvolatile bituminous coal with 10 and 20 wt% of olive residue were also used in the ignition experiments under air and oxy-fi ring conditions. The ignition behavior of the coals improved as the additions of biomass increased both in air and oxy-fi ring conditions. In particular, the effect of biomass blending was more noticeable in the ignition of the high rank coal. Since industrial oxy-coal combustion with a wet recycle would result in higher concentrations of H 2 O(v), the effect of steam addition on ignition behavior was also studied. A worsening in ignition behavior was observed when steam was added to the oxy-fuel combustion atmospheres, although an increase in the steam concentration from 10 to 20% did not produce any signifi cant difference in the ignition characteristics of the fuels.

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Application of lean flammability limit study and large eddy simulation to burner development for an oxy-fuel combustion system

Cited by 14 publications

References 18 publications

Fundamental Experiments of Coal Ignition for Engineering Design of Coal Power Plants

Fundamental Experiments of Coal Ignition for Engineering Design of Coal Power Plants

Oxyfuel Combustion for CO ₂ Capture

Ignition behavior of coal and biomass blends under oxy-firing conditions with steam additions

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Application of lean flammability limit study and large eddy simulation to burner development for an oxy-fuel combustion system

Cited by 14 publications

References 18 publications

Fundamental Experiments of Coal Ignition for Engineering Design of Coal Power Plants

Fundamental Experiments of Coal Ignition for Engineering Design of Coal Power Plants

Oxyfuel Combustion for CO 2 Capture

Ignition behavior of coal and biomass blends under oxy-firing conditions with steam additions

Contact Info

Product

Resources

About

Oxyfuel Combustion for CO ₂ Capture