Brown coal conversion by microwave plasma reactions under successive supply of methane

Kamei, Osamu; Onoe, Kaoru; Marushima, Wataru; Yamaguchi, Tatsuaki

doi:10.1016/s0016-2361(98)00055-6

Cited by 25 publications

(14 citation statements)

References 2 publications

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“…It has been studied for coal conversion or heavy oil upgrading. A brown coal was tested using the microwave plasma by Osamu Kamei et al [21]. A maximum oil yield of 18 wt% was obtained.…”

Section: Introductionmentioning

confidence: 99%

Non-thermal plasma enhanced heavy oil upgrading

Hao

Yang

et al. 2015

Fuel

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“…It has been studied for coal conversion or heavy oil upgrading. A brown coal was tested using the microwave plasma by Osamu Kamei et al [21]. A maximum oil yield of 18 wt% was obtained.…”

Section: Introductionmentioning

confidence: 99%

Non-thermal plasma enhanced heavy oil upgrading

Hao

Yang

et al. 2015

Fuel

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“…The use of small coke particle size is recommended in order to ensure more solid surface area that should improve reactant gas diffusion phenomena to favor coke reaction kinetics. Tubular reactors where a slurry of the carbon powder plus a solvent containing dissolved gases (CH 4 + H 2 ) flowing continuously have also been experimented [4], as well as microwave plasma reactor [6] and flash pyrolysis [2] both under CH 4 supply. A novel reactor experimented using Venezuelan petroleum coke under steam gasification employing solar energy [18] could also be considered introducing the variance of employing CH 4 instead of steam.…”

Section: Mrc Stagementioning

confidence: 99%

“…In connection with the second stage: methane reaction with coke (MRC), some reports deal with the reaction of methane with coal [2]- [6]. However, to the author's knowledge, reports regarding reaction of methane with coke are not found in the relevant literature related to hydrocarbon processing.…”

Section: Introduction: the Two-stage Processmentioning

confidence: 99%

Basic Engineering of a Two-Stage Process for Co-Upgrading Natural Gas and Petroleum Coke

Laine¹,

Tosta²

2015

ACES

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This communication highlights the possibility of using a novel two-stage process for the co-upgrading of natural gas and petroleum coke into liquid hydrocarbons. The first stage consists of the catalytic dehydroaromatization of methane characterized by producing hydrogen and aromatics: benzene, naphtalene, toluene, etc. The non-reacted methane plus hydrogen and aromatics produced in the first stage are directed to the second stage to react with the petroleum coke. Basic engineering analysis of proposed two-stage process suggests light petroleum production of 160,000 bbl/day from 20,000 ton/day of petroleum coke actually by-produced from Venezuelan Orinoco's heavy oil belt. Residual coke should be volatiles free therefore useful as a calcined coke.

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“…It has been studied in our laboratory that the effective conversion of coal (Yallourn coal and Taiheiyo coal) [4][5][6] and biomass (cellulose, lignin, saw dust, sugar cane bagasse) [7][8][9] by microwave plasma (MWP) are performed under reduce pressure by microwave (2.45 GHz), generated by a for lower electric power (300W) than the above mentioned works. When cellulose was used as a raw material, the yield of gaseous products (Y gas ) reached at 79 wt% and H 2 and CO was mainly obtained [7].…”

Section: Introductionmentioning

confidence: 99%

Comparison of Cellulose Decomposition by Microwave Plasma and Radio Frequency Plasma

Konno¹,

Onodera²,

Murata³

et al. 2011

GSC

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Biomass conversion by plasma has the advantage of mainly producing gaseous products, H2, CO and CO2. Though the thermal plasma has been used for this conversion, the plasma temperature is too high to be unfit for the conversion biomass. The temperature of cold plasma, however, is lower under 3000 K. It expects to be adequate for biomass conversion. Cold plasma can be obtained with irradiation microwave (2.45 GHz) or radio frequency (13.5 MHz) under reduce gas pressure. Therefore, in present study, the effective decomposition of cellulose by microwave plasma (MWP) and radio frequency plasma (RFP) is examined. The conversion of cellulose by MWP (XMWP) is higher than that by RFP (XRFP), irrespective of the reaction time. XMWP and XRFP reach 92.8 wt% at 10 min and 68.1 wt% at 30 min. The maximum yield of gaseous products (Ygas) by MWP is 85.1 wt% at 10 min, higher by 23.2 wt% than Ygas by RFP at 30 min. The amount of H2 and CO obtained by MWP is 18.0 mmol/g and 23.5 mmol/g, it is larger than that obtained by RFP. Comparing the relationship between conversion and yield, Ygas of MWP is slightly higher than that of RFP under X of 60 wt%, and both Ygas is almost same over 60 wt%. The amount of H2 and CO obtained by MWP is larger by 9.3 mmol/g and 9.6 mmol/g than that obtained by RFP. C, H and O element in cellulose is mainly distributed to H2 and CO by MWP. RFP mainly distributes H and O element to the other gases without H2 and CO. In addition, a large amount of C element is remains in the residue. Those results is found that MWP was more suitable for cellulose gasification than RFP, since MWP can highly convert C, H and O element to H2 and CO by higher energy of microwave frequency in comparison with radio frequency

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Brown coal conversion by microwave plasma reactions under successive supply of methane

Cited by 25 publications

References 2 publications

Non-thermal plasma enhanced heavy oil upgrading

Non-thermal plasma enhanced heavy oil upgrading

Basic Engineering of a Two-Stage Process for Co-Upgrading Natural Gas and Petroleum Coke

Comparison of Cellulose Decomposition by Microwave Plasma and Radio Frequency Plasma

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