Coupling of methane under pulse corona plasma (I) |
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Authors: | Zhu Aimin Gong Weimin Zhang Xiuling Zhang Baoan |
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Affiliation: | (1) Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 116023 Dalian, China;(2) Laboratory of Comprehensive Utilization for Carbonaceous Resources, Dalian University of Technology, 116012 Dalian, China |
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Abstract: | At normal temperature and pressure, pulse corona plasma was used as a new method for the dehydrogenative coupling of methane in the absence of oxygen. The effects of voltage polarity and input energy on the dehydrogenative coupling of methane were investigated. The parameter “energy efficiency” was introduced to examine the coupling of the input energy and the dehydrogenative coupling of methane. The experimental results show that positive corona gives higher energy efficiency than negative corona. When the positive corona was chosen, C2 yield per pass was 31.6% and acetylene yield per pass was 30.1% with 44.6% methane conversion at an input energy density of 1788kJ/mol and a pulse repetition frequency of 66Hz. The function of input energy density towards methane conversion may be expressed as a formula of-In(1-X) =k (PIF). In the range of input energy employed, C2 yield is proportional to input energy density, but energy efficiency drops off with increasing input energy density. |
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Keywords: | dehydrogenative coupling of methane pulse corona plasma energy efficiency |
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