IEEE Transactions on Plasma Science, Volume: 41
, Issue: 1, Digital Object Identifier: 10.1109/TPS.2012.2226608, 2013 ,
Page(s): 126 - 132
Hydrogen Production From Partial Oxidation of Methane
Using an AC Rotating Gliding Arc Reactor
Xiao Dong Li ; Hao Zhang ; Shi Xin Yan ; Jian
Hua Yan ; Chang Ming Du
Abstract
Hydrogen can be produced by the partial oxidation of
methane in an alternating-current rotating-gliding-arc plasma driven by swirling
flow. Researchers studied the effects of the air ratio, height of outer cover,
supply voltage, and gas flow rate on
methane reforming.
The conversion of methane grows with rising air
ratio. Hydrogen selectivity, on the other hand, is
first augmented, and subsequently
declines. Researchers observed a higher outer cover to be beneficial: maximum
methane conversion attains 80.73%. Reactor performance improves at higher
voltage. As the gas flow rate increases, both methane conversion and hydrogen selectivity diminish, while power consumption
first drops to a minimum value of 8.23 kJ/L H2 for a flow rate of 16
L/min and then again increases.
In conventional
gliding arc reactors, the ignition, elongation, extinguishment, and reignition
of the arc lead to a nonhomogeneous distribution of active species, resulting
in low reforming efficiency. This is due to the fact that active species are
the final carriers of reactions in plasma zones. Rotating gliding arc (RGA) can
solve this problem to some extent by periodically rotating the arc. The paper
describes use of an arc RGA reactor, driven by swirling flow, for hydrogen
production by the partial oxidation of methane. Effects of air ratio, height of
outer cover, supply voltage, and gas flow rate are examined in terms of methane
conversion, selectivity of products, hydrogen concentration, and power
consumption.
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