Syngas production from CO 2 /CH 4 rich combustion in a porous media burner: Experimental characterization and elementary reaction model

Zeng, Hongyu; Wang, Yuqing; Shi, Yixiang; Ni, Meng; Cai, Ningsheng

doi:10.1016/j.fuel.2017.03.003

Cited by 31 publications

(35 citation statements)

References 20 publications

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“…When the flame is stabilized near the interface, the convective heat transfer weakens and thus the temperature difference between the two phases is enlarged, which results to higher gas combustion temperature in the reaction zone for the smaller pellet diameter. Figures 2C,D show the predicted T g , T s by three different kinetics for α = 0 at λ s = 0.2888 W/m•K as well as experiment results (Zeng et al, 2017) for comparison. For α = 0, it can be seen that the predicted T g , T s are similar through the burner for the different three kinetics and the temperature differences predicted by the three kinetics are quiet small except for the reaction zone.…”

Section: Temperature Distributionsmentioning

confidence: 99%

“…A two-layer porous burner reported by Zeng et al (2017) is considered in the present work to study the sensitive of different kinetics to the predictions of syngas production in porous media. As shown in Figure 1, the burner was designed to study the effect of CO 2 addition on the conversion efficiency of CH 4 partial combustion within packed bed, which consists of two layers of alumina pellets with different diameters.…”

Section: Physical Modelmentioning

confidence: 99%

“…In the experiment (Zeng et al, 2017) the equivalence ratio and air flow rate are fixed while the ratio (α) between the CO 2 and CH 4 is changed from 0 to 1. The solid thermal conductivity of alumina is 7.22 W /m Kat T = 1,000 K, according to reference by Munro (1997).…”

Section: Temperature Distributionsmentioning

confidence: 99%

“…For the transient combustion system, combustion wave always propagates upstream or downstream and this leads to flame extinction at the end. To stabilize the flame within porous burner, two types of burner, namely, RFB (Drayton et al, 1998) and two-layer burner (Zeng et al, 2017;Wang et al, 2018) filled with different material or structures of the porous media were developed.…”

Section: Introductionmentioning

confidence: 99%

“…For the stationary systems, the burner was filled with different material or structures of porous media, the flame was restricted near two sections of the burners under a certain range of equivalence ratio and gas velocity. Zeng et al (2017) studied experimentally and numerically the syngas production in a twolayer burner for fuel-rich combustion with a range of CO 2 content in the CH 4 fuel. The experimental results showed that the reforming efficiency increased from 39.1 to 45.3% when the CO 2 was injected into the system.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Influence of Chemical Kinetics on Predictions of Performance of Syngas Production From Fuel-Rich Combustion of CO2/CH4 Mixture in a Two-Layer Burner

Shi

Mao

et al. 2020

Front. Chem.

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Numerical investigations on partial oxidation combustion of CO 2 /CH 4 mixture were executed for a two-layer burner using a two-dimensional two-temperature model with different detailed chemical reaction mechanisms that are DRM 19, GRI-Mech 1. 2, and GRI-Mech 3.0. Attention was focused on the influence of these mechanisms on predictions of the temperature distributions in the burner, chemical structure as well as syngas production. The equivalence ratio was a fixed value of 1.5, while the volumetric ratio of CO 2 to CH 4 was changed from 0 to 1. The predicted results were compared with the available experimental data. It was revealed that the chemical reaction mechanisms have little effect on the temperature distribution in the burner except for the exothermic zone. It indicted that the smaller kinetic DRM 19 can precisely predict the temperature distributions in the burner, using DRM 19 was recommended to save computational time when the detailed components of the syngas was not taken into consideration. In addition, all the three mechanisms predicted the same trend of molar fraction of CO, H 2 , and CO 2 with experimental results. Good agreement between the experiment and predictions of major species was obtained by GRI-Mech 1.2 and GRI-Mech 3.0, the two mechanisms had the same accuracy in predicting CO, H 2 , and CO 2 production. However, computations with DRM 19 under-predicted the molar fraction of CO and H 2. Furthermore, it was shown that the thermal conductivity of porous media has significant effect on the syngas production. In general, the temperature was increased as the thermal conductivity of the porous media was reduced and the H 2 production was increased.

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Section: Temperature Distributionsmentioning

confidence: 99%

Section: Physical Modelmentioning

confidence: 99%

Section: Temperature Distributionsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Influence of Chemical Kinetics on Predictions of Performance of Syngas Production From Fuel-Rich Combustion of CO2/CH4 Mixture in a Two-Layer Burner

Shi

Mao

et al. 2020

Front. Chem.

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Flame Propagation of Premixed Gas with Enhanced Heat Recirculation: Dynamic Characteristics of Lean and Rich Combustion

Dai,

Zou,

Wang

et al. 2024

Energy Tech

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Porous media combustion greatly improves the combustion of low calorific value gas (LCG), and appropriate heat control contributes to optimizing the flame evolution. To obtain the dynamic characteristics of lean‐rich combustion, an enhanced heat‐recirculating burner is built by embedding the cylindrical rod with high thermal conductivity. The temperature distribution and gas products are investigated under different rod parameters and operating conditions. The results indicate that the reduction of the equivalence ratio and inlet velocity are both beneficial for the upstream propagation of rich‐methane flame, which has an opposite trend to lean combustion. Regardless of the direction in which the rich‐methane flame propagates, the flame propagates the fastest as the diameter of the cylindrical rod is 8 mm. When the 8–120 cylindrical rod is embedded in the burner, the downstream propagation time is shortened by 73.40%. The appropriate embedment of the cylindrical rods in porous media not only accelerates the rich‐methane flame propagation but also promotes the conversion of methane to syngas. Moreover, the decrease in pellet diameter is also conducive to increasing syngas production. The above conclusions provide theoretical support for the efficient and clean utilization of LCG in the porous media.

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Pore-scale study of thermal nonequilibrium in a two-layer burner formed by staggered arrangement of particles

Shi

Chen

et al. 2020

Applied Thermal Engineering

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Syngas production from CO 2 /CH 4 rich combustion in a porous media burner: Experimental characterization and elementary reaction model

Cited by 31 publications

References 20 publications

Influence of Chemical Kinetics on Predictions of Performance of Syngas Production From Fuel-Rich Combustion of CO2/CH4 Mixture in a Two-Layer Burner

Influence of Chemical Kinetics on Predictions of Performance of Syngas Production From Fuel-Rich Combustion of CO2/CH4 Mixture in a Two-Layer Burner

Flame Propagation of Premixed Gas with Enhanced Heat Recirculation: Dynamic Characteristics of Lean and Rich Combustion

Pore-scale study of thermal nonequilibrium in a two-layer burner formed by staggered arrangement of particles

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