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Effect of catalytic cylinders on autothermal reforming of methane for hydrogen production in a microchamber reactor.

Yan Y, Guo H, Zhang L, Zhu J, Yang Z, Tang Q, Ji X - ScientificWorldJournal (2014)

Bottom Line: A new multicylinder microchamber reactor is designed on autothermal reforming of methane for hydrogen production, and its performance and thermal behavior, that is, based on the reaction mechanism, is numerically investigated by varying the cylinder radius, cylinder spacing, and cylinder layout.The results show that larger cylinder radius can promote reforming reaction; the mass fraction of methane decreased from 26% to 21% with cylinder radius from 0.25 mm to 0.75 mm; compact cylinder spacing corresponds to more catalytic surface and the time to steady state is decreased from 40 s to 20 s; alteration of staggered and aligned cylinder layout at constant inlet flow rates does not result in significant difference in reactor performance and it can be neglected.The results provide an indication and optimize performance of reactor; it achieves higher conversion compared with other reforming reactors.

View Article: PubMed Central - PubMed

Affiliation: Key Laboratory of Low-Grade Energy Utilization Technologies and Systems, Chongqing University, Ministry of Education, Chongqing 400030, China ; College of Power Engineering, Chongqing University, Chongqing 400030, China.

ABSTRACT
A new multicylinder microchamber reactor is designed on autothermal reforming of methane for hydrogen production, and its performance and thermal behavior, that is, based on the reaction mechanism, is numerically investigated by varying the cylinder radius, cylinder spacing, and cylinder layout. The results show that larger cylinder radius can promote reforming reaction; the mass fraction of methane decreased from 26% to 21% with cylinder radius from 0.25 mm to 0.75 mm; compact cylinder spacing corresponds to more catalytic surface and the time to steady state is decreased from 40 s to 20 s; alteration of staggered and aligned cylinder layout at constant inlet flow rates does not result in significant difference in reactor performance and it can be neglected. The results provide an indication and optimize performance of reactor; it achieves higher conversion compared with other reforming reactors.

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Related in: MedlinePlus

(a) Methane and (b) hydrogen conversion with aligned (■) and staggered (▲) layout of cylinder for different reaction time.
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Related In: Results  -  Collection


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fig10: (a) Methane and (b) hydrogen conversion with aligned (■) and staggered (▲) layout of cylinder for different reaction time.

Mentions: Methane and hydrogen conversion with staggered and aligned cylinder layout are illustrated in Figures 10(a) and 10(b); rather small differences with staggered and aligned cylinder layout are observed, indicating that the influence of cylinder layout for the overall reaction is negligible, despite the fact that the choice of aligned arrangement can reduce wear and tear on cylinders.


Effect of catalytic cylinders on autothermal reforming of methane for hydrogen production in a microchamber reactor.

Yan Y, Guo H, Zhang L, Zhu J, Yang Z, Tang Q, Ji X - ScientificWorldJournal (2014)

(a) Methane and (b) hydrogen conversion with aligned (■) and staggered (▲) layout of cylinder for different reaction time.
© Copyright Policy - open-access
Related In: Results  -  Collection

Show All Figures
getmorefigures.php?uid=PMC4109667&req=5

fig10: (a) Methane and (b) hydrogen conversion with aligned (■) and staggered (▲) layout of cylinder for different reaction time.
Mentions: Methane and hydrogen conversion with staggered and aligned cylinder layout are illustrated in Figures 10(a) and 10(b); rather small differences with staggered and aligned cylinder layout are observed, indicating that the influence of cylinder layout for the overall reaction is negligible, despite the fact that the choice of aligned arrangement can reduce wear and tear on cylinders.

Bottom Line: A new multicylinder microchamber reactor is designed on autothermal reforming of methane for hydrogen production, and its performance and thermal behavior, that is, based on the reaction mechanism, is numerically investigated by varying the cylinder radius, cylinder spacing, and cylinder layout.The results show that larger cylinder radius can promote reforming reaction; the mass fraction of methane decreased from 26% to 21% with cylinder radius from 0.25 mm to 0.75 mm; compact cylinder spacing corresponds to more catalytic surface and the time to steady state is decreased from 40 s to 20 s; alteration of staggered and aligned cylinder layout at constant inlet flow rates does not result in significant difference in reactor performance and it can be neglected.The results provide an indication and optimize performance of reactor; it achieves higher conversion compared with other reforming reactors.

View Article: PubMed Central - PubMed

Affiliation: Key Laboratory of Low-Grade Energy Utilization Technologies and Systems, Chongqing University, Ministry of Education, Chongqing 400030, China ; College of Power Engineering, Chongqing University, Chongqing 400030, China.

ABSTRACT
A new multicylinder microchamber reactor is designed on autothermal reforming of methane for hydrogen production, and its performance and thermal behavior, that is, based on the reaction mechanism, is numerically investigated by varying the cylinder radius, cylinder spacing, and cylinder layout. The results show that larger cylinder radius can promote reforming reaction; the mass fraction of methane decreased from 26% to 21% with cylinder radius from 0.25 mm to 0.75 mm; compact cylinder spacing corresponds to more catalytic surface and the time to steady state is decreased from 40 s to 20 s; alteration of staggered and aligned cylinder layout at constant inlet flow rates does not result in significant difference in reactor performance and it can be neglected. The results provide an indication and optimize performance of reactor; it achieves higher conversion compared with other reforming reactors.

Show MeSH
Related in: MedlinePlus