Extra pure hydrogen production through methane decomposition using nanosecond pulsed plasma and Pt–Re catalyst
| Autor: | Alireza Shariati, Mohammad Reza Rahimpour, Amin Mosallanejad, Hamed Taghvaei, Omid Khalifeh |
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| Rok vydání: | 2016 |
| Předmět: |
Chemistry
General Chemical Engineering Analytical chemistry 02 engineering and technology General Chemistry Plasma Coke Nonthermal plasma Nanosecond 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Industrial and Manufacturing Engineering 0104 chemical sciences Volumetric flow rate Catalysis Electrode Environmental Chemistry 0210 nano-technology Hydrogen production |
| Zdroj: | Chemical Engineering Journal. 294:132-145 |
| ISSN: | 1385-8947 |
| DOI: | 10.1016/j.cej.2016.02.077 |
| Popis: | In this paper, CH 4 conversion into H 2 via a nanosecond pulsed DBD plasma reactor has been studied experimentally. In order to maximize the energy efficiency, increase the input CH 4 flow rate and minimize the coke formation, some operating parameters including carrier gas flow, discharge power, CH 4 flow rate and concentration have been evaluated. In addition, performance of three types of plasma systems involving plasma alone, packed plasma and catalytic plasma systems is compared by filling the discharge zone with a commercial catalyst (Pt–Re/Al 2 O 3 ) and glass packing particles. Extra pure H 2 production and maximum CH 4 conversion of 100% can be obtained using the packed plasma system at CH 4 flow rates of up to 20 ml/min, Ar flow rate of 50 ml/min and the average power consumption of nearly 9 W. However, the maximum energy efficiency of 26.08% is achieved for the plasma alone system at the CH 4 flow rate of 20 ml/min, Ar flow rate of 50 ml/min and the power consumption of approximately 4 W. It is interestingly understood that at the Ar flow rate of 50 ml/min and lowest discharge powers (below 10 W), not only very high energy efficiencies and CH 4 conversions are achievable, but also formation of undesirable by products including higher hydrocarbons, and formation of coke on the electrode surface can be inhibited dramatically. Moreover, in catalytic system, conversion of above 90% can be obtained even at CH 4 flow rates of up to 30 ml/min. The strong performance of the plasma system at such a high concentration of CH 4 in the feed flow (CH 4 = 30 ml/min and Ar = 50 ml/min) is of paramount importance in comparison with previous similar investigations. |
| Databáze: | OpenAIRE |
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