The Potential of Thermal Plasma Gasification of Olive Pomace Charcoal

Tamošiūnas, Andrius; Chouchène, Ajmia; Valatkevičius, Pranas; Gimžauskaitė, Dovilė; Aikas, Mindaugas; Uscila, Rolandas; Ghorbel, Makrem; Jeguirim, Mejdi

doi:10.3390/en10050710

Cited by 40 publications

(23 citation statements)

References 48 publications

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“…However, the chemical process usually suffers from lower conversion efficiency and lower throughput in non-thermal plasma reactor. The thermal plasma [17,18] has a similar temperature for both the electron and the heavy particle, and is characterized with high enthalpy density, high chemical reactivity and high throughput, which provides a viable way for the thermal chemical process [19,20].…”

Section: Introductionmentioning

confidence: 99%

Hydropyrolysis of n-Hexane and Toluene to Acetylene in Rotating-Arc Plasma

Zhang

et al. 2017

Energies

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Thermal plasma pyrolysis is a powerful technology for converting waste or low-value materials to valuable gaseous hydrocarbons. This paper presents for the first time the hydropyrolysis of n-hexane and toluene in a rotating-arc plasma reactor. Effects of the mole ratio of H/C in the feed, power input and magnetic induction were investigated to evaluate the reaction performance. A lower H/C ratio could lead to a lower yield of C 2 H 2 and lower specific energy consumption, and there existed an optimum range of power input for both n-hexane and toluene pyrolysis within the investigated range. The yield of C 2 H 2 in n-hexane and toluene pyrolysis could reach 85% and 68%, respectively, with respective specific energy consumption (SEC) of 13.8 kWh/kg·C 2 H 2 and 19.9 kWh/kg·C 2 H 2 . Compared with the results reported in literature, the rotating-arc plasma process showed higher C 2 H 2 yield and lower energy consumption, which is attributed to the better initial mixing of the reactant with the hot plasma gas and the more uniform temperature distribution.

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Section: Introductionmentioning

confidence: 99%

Hydropyrolysis of n-Hexane and Toluene to Acetylene in Rotating-Arc Plasma

Zhang

et al. 2017

Energies

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“…Hence, further experiments could consider a larger reflux ratio, which would imply a higher retention time; moreover, the effect of reducing the oxygen feed rate should be assessed for determining whether such variation affects the performance of the operation. It is also expected that a variation of this type enhances the obtained figures of cold gas efficiency in all cases, which is related to the energy vectors content increase [62].…”

Section: Discussionmentioning

confidence: 99%

Low-Cost Syngas Shifting for Remote Gasifiers: Combination of CO2 Adsorption and Catalyst Addition in a Novel and Simplified Packed Structure

et al. 2018

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This paper presents the technical validation of a novel, low-complexity alternative based on the inclusion of a patented (IEPI-MU-2016-185) packed bed for improving the performance of remote, small-scale gasification facilities. This study was carried out in an updraft, atmospheric-pressure gasifier, outfitted with a syngas reflux line, air and oxygen feed, and an upper packed-bed coupled to the gasification unit to improve the syngas quality by catalytic treatment and CO 2 adsorption. The experimental facility is located in the rural community San Pedro del Laurel, Ecuador. Gasification experiments, with and without packed material in the upper chamber, were performed to assess its effect on the syngas quality. The assessment revealed that the packed material increases the carbon monoxide (CO) content in the syngas outlet stream while carbon dioxide (CO 2 ) was reduced. This option appears to be a suitable and low-complexity alternative for enhancing the content of energy vectors of syngas in gasification at atmospheric pressure since CO/CO 2 ratios of 5.18 and 3.27 were achieved against reported values of 2.46 and 0.94 for operations which did not include the addition of packed material. It is concluded that the upper packed-bed is an active element able to modify syngas characteristics since CO 2 content was reduced.

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“…Gasification temperature is a significant factor affecting volatile form and combustible gas composition [27][28][29][30]. As shown in Figure 2, with an increase in gasification temperature, the concentrations of CO and H 2 gradually increased in the gas produced, while the concentration of CO 2 significantly decreased and that of CH 4 slightly increased.…”

Section: Effect Of Gasification Temperature On Combustible Gas Composmentioning

confidence: 99%

The Effect of Rice Straw Gasification Temperature on the Release and Occurrence Modes of Na and K in a Fluidized Bed

2017

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Rice straw gasification was carried out in a laboratory fluidized bed reactor system from 600 to 800 • C in order to well-understand the release and occurrence mode of alkali metals as a function of temperature during the gasification process. Inductively coupled plasma atomic emission spectrometry (ICP-AES) was applied to analyze the original rice straw and obtained fly ash at different temperatures. The results show that the Water-Soluble, Ammonium acetate-Soluble, Hydrochloric acid-Soluble, and Aluminosilicate Combination-Soluble modes of the Na and K contents in rice straw decreased in sequence. The content of Water-Soluble salts of Na and K accounts for more than 50%, while the content of the Aluminosilicate Combination-Soluble mode is the lowest: less than 5%. The release rate of Na appears to be consistent but nonlinear, increasing with gasification conversion ranges between 50.2% and 70.8%, from which we can deduce that temperature is not the only factor that impacts Na emission. The release of K can be divided into two stages at 700 • C. At the first stage, the release rate of K is almost invariable, ranging from 23.3% to 26%. At the second stage, the release rate increases sharply: up to 55.9%. The concentration and the proportion of the Water-Soluble, Ammonium acetate-Soluble, and Hydrochloric acid-Soluble modes of Na in fly ash decrease with a temperature increase. The release of K can be explained as follows: one path is an organic form of K converted into its gaseous phase; the other path is a soluble inorganic form of K that is volatile at a high temperature. With a temperature increase, the Aluminosilicate Combination-Soluble mode of both Na and K increases.

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The Potential of Thermal Plasma Gasification of Olive Pomace Charcoal

Cited by 40 publications

References 48 publications

Hydropyrolysis of n-Hexane and Toluene to Acetylene in Rotating-Arc Plasma

Hydropyrolysis of n-Hexane and Toluene to Acetylene in Rotating-Arc Plasma

Low-Cost Syngas Shifting for Remote Gasifiers: Combination of CO2 Adsorption and Catalyst Addition in a Novel and Simplified Packed Structure

The Effect of Rice Straw Gasification Temperature on the Release and Occurrence Modes of Na and K in a Fluidized Bed

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