Effects of rough structure geometrical parameters on conversion of methane catalytic combustion and extinction limit in a micro-channel: A numerical study

2021 ◽  
Author(s):  
Tiantian Cai ◽  
Jingyu Ran ◽  
Juntian Niu ◽  
Zhongqing Yang ◽  
Xin Huang ◽  
...  
Keyword(s):  
Catalytic Combustion ◽  
Numerical Study ◽  
Micro Electro Mechanical System ◽  
Vital Role ◽  
Geometrical Parameters ◽  
Micro Channel ◽  
Extinction Limit ◽  
Conversion Of Methane ◽  
Methane Catalytic Combustion ◽  
Catalytic Combustion Of Methane

The micro-channel combustion plays a vital role in micro-electro-mechanical system，the inner surface of micro-channel is not absolutely smooth and whether the rough structure beneficial to the catalytic combustion of methane...

Parametric study of methane catalytic combustion in a micro-channel reactor: Effects of porous washcoat properties

Fuel ◽  
2021 ◽  
Vol 290 ◽  
pp. 120099
Author(s):  
Weiqiang Liu ◽  
John Wen ◽  
Jinke Gong ◽  
Guanlin Liu ◽  
Chao Zhong ◽  
...  
Keyword(s):  
Parametric Study ◽  
Catalytic Combustion ◽  
Micro Channel ◽  
Channel Reactor ◽  
Methane Catalytic Combustion

scholarly journals Experimental Study on Catalytic Combustion of Methane in a Microcombustor with Metal Foam Monolithic Catalyst

Catalysts ◽  
2018 ◽  
Vol 8 (11) ◽  
pp. 536 ◽  
Author(s):  
Yanxia Li ◽  
Chaoming Luo ◽  
Zhongliang Liu ◽  
Feng Lin
Keyword(s):  
Catalytic Combustion ◽  
Equivalence Ratio ◽  
Metal Foam ◽  
Great Influence ◽  
Porous Matrix ◽  
Stoichiometric Ratio ◽  
Inlet Velocity ◽  
Monolithic Catalyst ◽  
Conversion Of Methane ◽  
Catalytic Combustion Of Methane

Utilizing catalysts in microcombustors is probably an excellent practical solution to stabilize fuel combustion because of the relatively fast reaction speed. In the present work, the monolithic catalyst Pd/A2O3/Fe-Ni with metal foam as matrix was used inside a 5 mm in diameter microcombustor. Then the effects of inlet velocity and equivalent ratio on catalytic combustion characteristics of methane were studied experimentally. The results showed that the methane and air mixture with the stoichiometric ratio Φ = 1.0 could be ignited at v = 0.2–0.6 m/s. The velocity of premixed mixture had a great influence on the catalytic combustion of methane. The larger the inlet velocity, the higher the temperature and the brighter the flame were. The experiment results also showed that the equivalence ratio had a large essential impact on the catalytic combustion, especially for the lean mixture of methane and air. It seemed the addition of the porous matrix with catalysts could significantly extend the limits of stable combustion. In the detection of exhaust gas, CO selectivity increased and CO2 selectivity decreased with the equivalence ratio. When Φ was between 0.94 and 1.0 m/s, a little amount of hydrogen was produced due to the lack of oxygen. The measured conversion of methane to CO and CO2 was very high, usually greater than 99%, which indicated the excellent performance of the catalyst.

Reactors Used for Catalytic Combustion of Methane

2013 ◽  
Vol 634-638 ◽  
pp. 798-804 ◽  
Author(s):  
Fen Fen Wang ◽  
Rui Fu ◽  
Rui Sheng Hu ◽  
Ran Ran Ding
Keyword(s):  
Membrane Reactor ◽  
Catalytic Combustion ◽  
Flow Reactor ◽  
Reverse Flow ◽  
Fixed Bed ◽  
Fixed Bed Reactor ◽  
Channel Reactor ◽  
Methane Catalytic Combustion ◽  
Reverse Flow Reactor ◽  
Catalytic Combustion Of Methane

This paper introduces several kinds of reactors for methane catalytic combustion. Furthermore, we briefly summarize and compare advantages, disadvantages, research progresses and experimental applications of fixed-bed reactor, catalytic fluidized-bed reactor, catalytic reverse flow reactor, micro-channel reactor and catalytic membrane reactor for methane catalytic combustion.

Au@PdOx with a PdOx-rich shell and Au-rich core embedded in Co3O4 nanorods for catalytic combustion of methane

Nanoscale ◽  
2017 ◽  
Vol 9 (6) ◽  
pp. 2123-2128 ◽  
Author(s):  
Nating Yang ◽  
Jingwei Liu ◽  
Yuhan Sun ◽  
Yan Zhu
Keyword(s):  
Catalytic Combustion ◽  
Catalytic Performance ◽  
Methane Catalytic Combustion ◽  
Catalytic Combustion Of Methane ◽  
Co3o4 Nanorods

Au@PdOx/Co3O4 nanorods exhibited enhanced catalytic performance for methane catalytic combustion, compared to monometallic Pd or Au/Co3O4 and conventional PdAu/Co3O4 catalysts.

Numerical study on catalytic combustion of methane with ozone using Pd-exchanged zeolite X

2015 ◽  
Vol 58 (5) ◽  
pp. 899-904
Author(s):  
Rui Wu ◽  
Rong Chen ◽  
Hong Wang ◽  
Zhibin Wang ◽  
Xun Zhu ◽  
...  
Keyword(s):  
Catalytic Combustion ◽  
Numerical Study ◽  
Zeolite X ◽  
Catalytic Combustion Of Methane

The Effect of Barium Modification on the Sulfur Tolerance of Methane Catalytic Combustion over PdO/Al2O3 Catalysts

2011 ◽  
Vol 287-290 ◽  
pp. 1685-1690
Author(s):  
Lei Ma ◽  
Ping Xie ◽  
Dian Qiao Lu ◽  
Chun Shan Lu ◽  
Qun Feng Zhang ◽  
...  
Keyword(s):  
Catalytic Combustion ◽  
Load Capacity ◽  
High Load ◽  
Sulfur Poisoning ◽  
Sulfur Tolerance ◽  
Pure Alumina ◽  
Methane Catalytic Combustion ◽  
Catalytic Combustion Of Methane ◽  
High Load Capacity

The sulfur tolerance over palladium supported on pure alumina and on alumina modified with barium of catalytic combustion of methane is investigated. Characterization of the catalysts is performed by, XRD and H2-TPR techniques. Barium nitrate as the precursor to the formation of Ba(NO2)2species can inhibit the SO2and SO3overflow from Al2(SO3)3and Al2(SO4)3sulfate to the adjacent PdO. Ba content on the performance of the catalyst resistance to sulfur poisoning has important implications. 0.7% Ba-1% Pd/Al2O3catalyst resistance to sulfur poisoning property is close to that of high load capacity 5% Pd/Al2O3catalyst.

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