Shigeru Futamura

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Hydrogen generation from water, methane, and methanol was investigated with different types of nonthermal plasma reactors under different conditions. With a ferroelectric packed-bed reactor in N/sub 2/, hydrogen gas yield decreased in the order: methanol>methane>water. A similar trend was observed with a silent discharge plasma reactor, but substrate(More)
This work presents a comparative assessment of five different types of plasma reactors (pulsed corona, dielectric-barrier discharge (DBD), surface discharge (SD), BaTiO/sub 3/ packed-bed reactor, and plasma-driven catalyst (PDC) reactor) using the decomposition of gas-phase benzene. The parameters used in the assessment include energy constant, carbon(More)
Steam reforming of methane, ethane, propane and neopentane was investigated with two types of nonthermal plasma reactors. With a ferroelectric packed-bed reactor (FPR) in N/sub 2/, almost the same conversions were obtained for ethane, propane and neopentane, but methane was less reactive than these hydrocarbons. Hydrogen gas yield decreased in the order:(More)
⎯ The decomposition of volatile organic compounds (VOCs) was investigated using a flow-type plasma-driven catalysis (PDC) system and a cycled system. In the flow-type PDC reactor a trade-off relation was observed between the formation of nitrogen oxides and the decomposition of VOCs. Complete decomposition of VOC to CO 2 was achieved with the cycled system(More)
CO/sub 2/ reforming of methane, propane, and neopentane was investigated with a ferroelectric packed-bed reactor (FPR) in N/sub 2/ at temperatures ranging from 298 K to 433 K. The reaction behavior of the hydrocarbons was greatly affected by their chemical structures and reaction temperature. At ambient temperature, hydrocarbon conversion decreased in the(More)
Reactor type and voltage properties affected the reforming behavior of 1% methanol in N/sub 2/ with nonthermal plasma. Methanol conversion increased with voltage frequency for both a ferroelectric packed-bed reactor (FPR) and a silent discharge reactor (SDR), but they showed different sensitivities to frequency change at fixed applied voltages. In the(More)
The reaction behavior of mixed dichloromethane (CH<sub>2</sub>Cl<sub>2</sub>) and toluene in nonthermal plasma was investigated with a ferroelectric packed-bed reactor. The decomposition efficiencies of 109 ppm CH<sub>2</sub>Cl<sub>2</sub> and 100 ppm toluene were not affected by mixing in the presence of O<sub>2</sub>. In the decomposition of(More)
The temperature dependence of toluene decomposition behavior was investigated with a two-stage discharge and ozone-decomposition-catalyst hybrid reactor. Toluene conversion jumped by four times by adding catalyst to the discharge at ambient temperature. This synergistic effect diminished with an increase in temperature, and no synergy was observed at higher(More)
In the removal of volatile organic compounds (VOCs) with nonthermal plasma (NTP), the additive effect of water on VOC decomposition is an important issue to be solved since water is contained in VOC exhausts. Although there have been disputed discussions on the additive effect of water on the decomposition of VOCs in NTP, a unified mechanism has not been(More)
In the decomposition of methanol, dichloromethane, toluene, and their binary mixtures with nonthermal plasma in N<sub>2</sub>, the energy efficiency for the decomposition of each volatile organic compound (VOC) increased with its initial concentration. The addition of oxygen increased the maximum energy efficiency and the corresponding reactor energy(More)