Experimental Study on Catalytic Combustion of Gasoline Vapor

2012 ◽  
Vol 549 ◽  
pp. 432-436 ◽  
Author(s):  
Pei Wen Wang ◽  
Yang Du ◽  
De Wen Zhou ◽  
Jian Jun Liang ◽  
Yi Zhou
Keyword(s):  
Experimental Study ◽  
Catalytic Combustion ◽  
Cost Effective ◽  
Packed Bed ◽  
Packed Bed Reactor ◽  
Inlet Temperature ◽  
Gasoline Vapor ◽  
Environmental Friendly ◽  
Bed Temperature ◽  
Full Conversion

This paper provides the results of an experimental research on the performance of catalytic combustion of gasoline vapor. A packed bed reactor was built to test the effect of inlet temperature and concentration on catalytic combustion of gasoline vapor over Pd/Al2O3. The study shows that catalytic combustion is a cost-effective and environmental friendly method to control this kind of emission. The light-off temperature is quite low and full conversion rate is easy to achieve. Meanwhile, the method of controlling the bed temperature is proposed to avoid sintering if the technology is utilized in larger-scale equipment.

Experimental Study on Catalytic Combustion Parameters of Gasoline Vapor in Oxygen-Poor Condition

2013 ◽  
Vol 724-725 ◽  
pp. 1192-1197 ◽  
Author(s):  
Jian Jun Liang ◽  
Yang Du ◽  
Yi Hong Ou ◽  
Pei Wen Wang ◽  
Hai Bing Qian ◽  
...  
Keyword(s):  
Experimental Study ◽  
Flow Rate ◽  
Ignition Temperature ◽  
Catalytic Combustion ◽  
Combustion Process ◽  
Gas Mixture ◽  
Inlet Temperature ◽  
Control Parameters ◽  
Poor Condition ◽  
Gasoline Vapor

This paper studied gasoline vapor combustion catalyzed by Pd/Al2O3 in oxygen-poor condition. By adjusting the gasoline vapor and oxygen, the inlet temperature and flow rate, collecting data of temperature difference between outlet and inlet as well as the change of gas mixture, the study analyzed the various factors in the catalytic combustion process, and optimized the process control parameters. The results indicated that catalytic combustion was more efficient at the ignition temperature of 274 °C, burned 50% of gasoline vapor in oxygen-poor condition (O2 fraction was 12%).

scholarly journals Experimental study of the convective heat transfer coefficient in a packed bed at low Reynolds numbers

2014 ◽  
Vol 18 (2) ◽  
pp. 443-450 ◽  
Author(s):  
Souad Messai ◽  
Ganaoui El ◽  
Jalila Sghaier ◽  
Ali Belghith
Keyword(s):  
Heat Transfer ◽  
Experimental Study ◽  
Heat Transfer Coefficient ◽  
Transfer Coefficient ◽  
Convective Heat Transfer ◽  
Convective Heat ◽  
Convective Heat Transfer Coefficient ◽  
Packed Bed ◽  
Bed Temperature ◽  
Proposed Model

An experimental study to evaluate the convective heat transfer coefficient in a cylindrical packed bed of spherical porous alumina particles is investigated. The task consists in proposing a semi-empirical model to avoid excessive instrumentation and time consumption. The measurement of the bed temperature associated to a simple energy balances led to calculate the gas to particle heat transfer coefficient using a logarithmic mean temperature difference method. These experiments were performed at atmospheric pressure. The operating fluid is humid air. The gas velocity and temperature ranged from 1.7-3 m/s and 120-158?C, respectively. The data obtained was compared with the correlations reported in the literature. It is shown that the proposed model is in reasonable agreement with the correlation of Ranz and Marshall. Despite, many researches on experimental investigations of heat transfer coefficient in packed beds at low and average temperature are proposed, few studies presented calculation of convective heat transfer coefficient at high temperature (above 120?C). A possible application of the proposed model is drying and combustion.

scholarly journals Modeling and Design of a Multi-Tubular Packed-Bed Reactor for Methanol Steam Reforming over a Cu/ZnO/Al2O3 Catalyst

Energies ◽  
2020 ◽  
Vol 13 (3) ◽  
pp. 610 ◽  
Author(s):  
Jimin Zhu ◽  
Samuel Simon Araya ◽  
Xiaoti Cui ◽  
Simon Lennart Sahlin ◽  
Søren Knudsen Kær
Keyword(s):  
Steam Reforming ◽  
Packed Bed ◽  
Methanol Conversion ◽  
Operating Conditions ◽  
Packed Bed Reactor ◽  
Inlet Temperature ◽  
Methanol Steam Reforming ◽  
Shell Side ◽  
Co Concentration ◽  
The Impact

Methanol as a hydrogen carrier can be reformed with steam over Cu/ZnO/Al2O3 catalysts. In this paper a comprehensive pseudo-homogenous model of a multi-tubular packed-bed reformer has been developed to investigate the impact of operating conditions and geometric parameters on its performance. A kinetic Langmuir-Hinshelwood model of the methanol steam reforming process was proposed. In addition to the kinetic model, the pressure drop and the mass and heat transfer phenomena along the reactor were taken into account. This model was verified by a dynamic model in the platform of ASPEN. The diffusion effect inside catalyst particles was also estimated and accounted for by the effectiveness factor. The simulation results showed axial temperature profiles in both tube and shell side with different operating conditions. Moreover, the lower flow rate of liquid fuel and higher inlet temperature of thermal air led to a lower concentration of residual methanol, but also a higher concentration of generated CO from the reformer exit. The choices of operating conditions were limited to ensure a tolerable concentration of methanol and CO in H2-rich gas for feeding into a high temperature polymer electrolyte membrane fuel cell (HT-PEMFC) stack. With fixed catalyst load, the increase of tube number and decrease of tube diameter improved the methanol conversion, but also increased the CO concentration in reformed gas. In addition, increasing the number of baffle plates in the shell side increased the methanol conversion and the CO concentration.

BEHAVIOUR OF AN ADIABATIC PACKED BED REACTOR PART 1: EXPERIMENTAL STUDY

1993 ◽  
Vol 121 (1) ◽  
pp. 27-53 ◽  
Author(s):  
A.N.R. BOS ◽  
L. VAN DE BELD ◽  
J.B. OVERKAMP ◽  
K.R. WESTERTERP†
Keyword(s):  
Experimental Study ◽  
Packed Bed ◽  
Packed Bed Reactor

Experimental study on the controlled air oxidation of sawdust in a packed-bed reactor

2012 ◽  
Vol 29 (4) ◽  
pp. 534-539 ◽  
Author(s):  
Qingmin Meng ◽  
Xiaoping Chen ◽  
Changsheng Bu ◽  
Jiliang Ma
Keyword(s):  
Experimental Study ◽  
Packed Bed ◽  
Packed Bed Reactor ◽  
Air Oxidation

scholarly journals Kinetics of low-temperature catalytic combustion of ethylene at wet conditions for postharvest storage applications

2021 ◽  
Author(s):  
Natalia Semagina ◽  
Rosanne Tam ◽  
James Sawada
Keyword(s):  
Low Temperature ◽  
Air Conditioning ◽  
Catalytic Combustion ◽  
Batch Reactor ◽  
Packed Bed ◽  
Packed Bed Reactor ◽  
Postharvest Storage ◽  
Ethylene Concentration ◽  
Trace Concentrations ◽  
Kinetics Of

The study addresses the reduction of ethylene levels in postharvest storage applications using a Pd-Zn-Sn/TiO2 catalyst, which is capable of reacting trace concentrations of ethylene at temperatures as low as 278 K and at relative humidity as high as 90%. The rate law is derived from data collected using a constant volume batch reactor and a model for a storage room with associated packed bed reactor is developed. The amount of catalyst required to maintain an ethylene concentration of 0.1 ppmv in a room containing 20 tons of fruit having an ethylene metabolism of 0.1 ul/kg hr was calculated as a function of air temperature and water content. While the catalyst is capable of continuously removing ethylene from saturated, refrigerated air, the amount of catalyst required can be reduced significantly by incorporating conventional air conditioning solutions upstream of the catalyst bed. Such combined systems and their functions are discussed

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