Plasma assisted dry methane reforming using gliding arc gas discharge: Effect of feed gases proportion

Bo, Zheng; Yan, Jun; Li, Xiaodong; Chi, Yong; Cen, Kefa

doi:10.1016/j.ijhydene.2008.05.101

Cited by 141 publications

(84 citation statements)

References 40 publications

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“…As an alternative, the cold plasma generated by different discharge types provides a new way for the chemical process, such as chemical synthesis, treatment of hazardous waste and surface modification [12]. For the process of dry reforming of CH 4 , different discharge types to generate the cold plasma were investigated, such as gliding arc gas discharge [13][14][15], pulsed glow discharge [16], radio-frequency discharge [17,18], pulsed microwave discharge [19], two pins discharge [20], pulsed corona discharge [21], AC discharge [22], and especially the dielectric barrier discharge (DBD) [23][24][25][26][27], etc. The DBD is the most commonly used type to produce the cold plasma with energetic electrons at atmosphere pressure [28].…”

Section: Introductionmentioning

confidence: 99%

Investigation of Dry Reforming of Methane in a Dielectric Barrier Discharge Reactor

Wang

Yan

et al. 2009

Plasma Chem Plasma Process

142

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Low temperature conversion of CH 4 and CO 2 was investigated in a coaxial dielectric barrier discharge reactor at ambient pressure. Main parameters, including the input power, the residence time, the discharge gap, the molar ratio of the feed gases and the multi-stage ionization design were evaluated to understand the ways to improve the conversion of greenhouse gases and reduce the output of by-products. At certain input power, the conversion of CH 4 and CO 2 can reach 0.797 and 0.527, respectively, when the molar ratio of CH 4 /CO 2 is one. When this ratio was low to 1:5, the conversion of CH 4 was promoted to 0.843 and the selectivity to CO and H 2 was almost 100%. The multi-stage ionization favored the conversion of CO 2 , which would also be an efficient design to promote the selectivity to the main products such as CO and H 2 and suppress the selectivity to the by-products.

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Section: Introductionmentioning

confidence: 99%

Investigation of Dry Reforming of Methane in a Dielectric Barrier Discharge Reactor

Wang

Yan

et al. 2009

Plasma Chem Plasma Process

142

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“…However, the low CO 2 / CH 4 ratio results in the rapid deterioration in the discharge derived from carbonaceous deposition. 17 In our previous work, 18 using a tubular high-voltage electrode and a rotarydisc ground electrode, the deterioration problem in the discharge was solved successfully and stable kilohertz spark discharges in pure CH 4 were achieved. Moreover, high conversion of methane and low EC for converting CH 4 were reported in the kilohertz spark-discharge plasma.…”

Section: Introductionmentioning

confidence: 98%

Carbon dioxide reforming of methane in kilohertz spark‐discharge plasma at atmospheric pressure

Zhu

Shi

et al. 2010

AIChE Journal

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The spark-discharge plasma, generated between tubular and rotary-disc electrodes using a sine-wave high voltage with 5 kHz frequency, was explored for CO 2 reforming of CH 4 . Based upon the investigation on the effects of specific energy input and CO 2 / CH 4 ratio, the energy costs (EC) and fuel-production efficiencies (g) at various CO 2 / CH 4 ratios (r) in the same conversion range were compared and accordingly their sequences were given: EC CH 4 (r ¼ 0.5) and EC CO 2 (r ¼ 3) are the lowest; g(r ¼ 0.5) is the highest. Compared with other nonthermal discharge techniques, the kilohertz spark discharge exhibits low EC and high fuel-production efficiency, especially at high total-carbon conversions. Preliminary investigation on partial oxidation and CO 2 mixed reforming at (O 2 þ CO 2 )/CH 4 ¼ 0.5 exhibited high H 2 /CO ratio (nearly 2) and low total-carbon EC (0.59-0.96 MJ/mol, 58-77% of total-carbon conversion, and O 2 /(CO 2 þ O 2 ) ¼ 0.8).

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“…Assim a produção de hidrogênio como fonte energética e a produção de negro de carbono como insumo industrial se torna atrativa e compensa o gasto energético e operacional do sistema (CHEN et al, 2008), (CHAUBEY et al, 2013). Do ponto de vista ambiental a utilização do plasma é ainda mais vantajosa, pois a partir de fontes poluentes podem ser produzidos produtos com valor agregado e principalmente contribuir com o controle da emissão de gases (BO et al, 2008), (CHEN et al, 2008), (HORNG et al, 2009).…”

Section: Introductionunclassified

Produção de Hidrogênio e Negro de Carbono a partir da Degradação de Metano por Plasma Térmico

et al. 2014

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ResumoO gás metano (CH 4 ) é um dos principais gases indutores do efeito estufa. Pesquisas científicas recentes visam minimizar o acúmulo deste gás na atmosfera e desenvolver processos capazes de produzir materiais estáveis com valor agregado. O plasma térmico é uma alternativa promissora para alcançar tais objetivos, pois possibilita a obtenção de H 2 e carbono sólido a partir do CH 4 , sem a formação paralela de subprodutos como CO 2 e NO x . Neste trabalho, o CH 4 foi degradado por plasma térmico visando a produção de hidrogênio (H 2 ) e negro de carbono. A eficiência de degradação do CH 4 , o rendimento do processo e a caracterização do negro de carbono produzido foram estudados. Os melhores resultados obtidos foram no fluxo de 5 L min -1 de CH 4 a porcentagem de degradação e a seletividade para a produção de H 2 chegam a 98,8 % e 48,4 %, respectivamente. Em fluxos menores que 5 L min -1 , o rendimento na produção de H 2 aumenta e chega a 91,9 %. O negro de carbono obtido apresenta estrutura amorfa, características hidrofóbicas e pode ser comercializado como material para compósitos, podendo ainda ser ativado química e/ou fisicamente e utilizado como material adsorvente. Palavras-chave: Plasma térmico. Metano. Hidrogênio. Negro de carbono. AbstractMethane gas (CH 4 ) is the main inducer of the so called greenhouse gases effect. Recent scientific research aims to minimize the accumulation of this gas in the atmosphere and to develop processes capable of producing stable materials with added value. Thermal plasma technology is a promising alternative to these applications, since it allows obtaining H 2 and solid carbon from CH 4 , without the parallel formation of byproducts such as CO 2 and NO x . In this work, CH 4 was degraded by thermal plasma in order to produce hydrogen (H 2 ) and carbon black. The degradation efficiency of CH 4 , selectivity for H 2 production as well as the characterization of carbon black were studied. The best results were obtained in the CH 4 flow rate of 5 L min -1 the degradation percentage and the selectivity for H 2 production reached 98.8 % and 48.4 %, respectively. At flow rates of less than 5 L min -1 the selectivity for H 2 production increases and reaches 91.9 %. The carbon black has obtained amorphous with hydrophobic characteristics and can be marketed to be used in composite material, and can also be activated chemically and/or physically and used as adsorbent material.

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Plasma assisted dry methane reforming using gliding arc gas discharge: Effect of feed gases proportion

Cited by 141 publications

References 40 publications

Investigation of Dry Reforming of Methane in a Dielectric Barrier Discharge Reactor

Investigation of Dry Reforming of Methane in a Dielectric Barrier Discharge Reactor

Carbon dioxide reforming of methane in kilohertz spark‐discharge plasma at atmospheric pressure

Produção de Hidrogênio e Negro de Carbono a partir da Degradação de Metano por Plasma Térmico

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