中国科技论文在线

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2005年03月04日

【期刊论文】Plasma methane conversion in the presence of carbon dioxide using dielectric-barrier discharges

刘昌俊， Yue-ping Zhang a， b， Yang Li a， Yu Wang a， Chang-jun Liu a， *， Baldur Eliasson c

Fuel Processing Technology 83(2003)101-109，-0001，（）：

-1年11月30日

Methane conversion in the presence of carbon dioxide was investigated under the conditions of dielectric-barrier discharge plasmas. Different from the previous investigations, the grounded electrode is covered by the dielectric material (quartz) in the present reactor design. The product contains gaseous hydrocarbons, syngas and oxygenates. No liquid hydrocarbons can be detected with the present reactor design. The oxygenates produced includes acetic acid, propanoic acid, ethanol and methanol. There exists an optimum feed ratio of CH4/CO2 to make the maximum selectivity of the objective oxygenate. The highest selectivity of acetic acid was 5.2% achieved at CH4 and CO2 conversions of 64.3% and 43.1%, respectively.

Methane， CO2， Oxygenates， Light hydrocarbons， Dielectric-barrier discharge

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2005年03月04日

【期刊论文】Methane Conversion to Higher Hydrocarbons in the Presence of Carbon Dioxide Using Dielectric-Barrier Discharge Plasmas

刘昌俊， Chang-Jun Liu，， Bingzhang Xue， Baldur Eliasson， Fei He， Yang Li， and Gen-Hui Xu

Plasma Chemistry and Plasma Processing, Vol. 21, No.3, 2001，-0001，（）：

-1年11月30日

摘要

Experimental in

Methane， carbon dioxide， higher hydrocarbon， dielectric barrier discharge.，

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2005年03月04日

【期刊论文】Partial oxidation of methane to syngas over glow discharge plasma treated Ni-Fe/Al2O3 catalyst

刘昌俊， Jian-guo Wang a， b， Chang-jun Liu a， *， Yue-ping Zhang c， Kai-lu Yu a， Xin-li Zhua， Fei Hea

Catalysis Today 89(2004)183-191，-0001，（）：

-1年11月30日

摘要

Ni-Fe/Al2O3 catalyst for partial oxidation of methane was prepared first by glow discharge plasma treatment following by calcinations thermally. Such prepared catalyst exhibits better performance over the catalyst prepared without such plasma treatment. The conversion of methane and the selectivity of CO and H2 over the plasma treated catalyst are 97.44, 100 and 100% at 875℃, while, at the same temperature, they are 90.09, 97.28 and 97.09%, respectively, over the catalyst prepared without plasma treatment. At the same methane conversion, the reaction temperature with the plasma treated Ni-Fe/Al2O3 is at least 80℃ lower. TEM characterization shows that the catalytically active species after plasma treatment are still highly dispersed on the support. In addition, the plasma treated Ni-Fe/Al2O3 catalyst also possesses better anti-carbon deposit ability.

Glow discharge， Plasma， Ni/， Al2O3， Partial oxidation， Catalyst， Methane， Syngas

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2005年03月04日

【期刊论文】Remarkable enhancement in the dispersion and low-temperature activity of catalysts prepared via novel plasma reduction-calcination method

刘昌俊， Chang-jun Liu a， b， *， Dang-guo Cheng a， Yue-ping Zhang a， c， Kai-lu Yu a， Qing Xia a， Jian-guo Wang a， and Xin-li Zhu a

Catalysis Surveys from Asia, Vol. 8, No.2, June 2004，-0001，（）：

-1年11月30日

摘要

A novel plasma reduction and calcination (PR&C) method has been recently developed. Upon the experimental investigations on methane conversions, including partial oxidation, methane combustion, NO reduction by methane and CO2 reforming, the catalysts prepared by this PR&C method exhibit a remarkable enhancement in the dispersion, low-temperature activity and stability. A plasma-enhanced acidity has also been addressed, which would play an important role in the improved dispersion. The PR&C method is leading to a better preparation of supported catalysts, esp., those for methane conversion.

plasma,， reduction， glow discharge， calcination， dispersion， acidity， stability， methane conversion.，

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2005年03月04日

【期刊论文】A DFT study of synthesis of acetic acid from methane and carbon dioxide

刘昌俊， Jian-guo Wang a， Chang-jun Liu a， *， Yue-ping Zhang b， Baldur Eliasson c

Chemical Physics Letters 368(2003)313-318，-0001，（）：

-1年11月30日

摘要

We have previously reported an experimental investigation on synthesis of acetic acid directly from CH4 and CO2 via dielectric-barrier discharge. In this work, a DFT study was conducted using three hybrid DFT methods in order to understand the mechanism of such direct synthesis. It suggests that the synthesis is via two pathways with CO 2 and CO as key intermediates. The energy requirement with CO 2 pathway is much less than that with CO. The methyl radical formation and the dissociation of CO2 are two limiting steps for the synthesis of acetic acid directly from CH4 and CO2.

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