Kinetic modelling of VOC catalytic steam pyrolysis for tar abatement phenomena in gasification/pyrolysis technologies
| dc.contributor.author | Taralas, G. | en |
| dc.contributor.author | Kontominas, M. G. | en |
| dc.date.accessioned | 2015-11-24T16:40:49Z | |
| dc.date.available | 2015-11-24T16:40:49Z | |
| dc.identifier.issn | 0016-2361 | - |
| dc.identifier.uri | https://olympias.lib.uoi.gr/jspui/handle/123456789/8316 | |
| dc.rights | Default Licence | - |
| dc.subject | cao | en |
| dc.subject | mgo | en |
| dc.subject | nimo catalyst | en |
| dc.subject | calcined dolomite | en |
| dc.subject | gasification | en |
| dc.subject | steam pyrolysis | en |
| dc.subject | toluene | en |
| dc.subject | tar | en |
| dc.subject | volatile organic compound | en |
| dc.subject | biomass gasification | en |
| dc.subject | calcined dolomite | en |
| dc.subject | fluidized-bed | en |
| dc.subject | raw gas | en |
| dc.subject | hot gas | en |
| dc.subject | n-heptane | en |
| dc.subject | fuel gas | en |
| dc.subject | gasifier | en |
| dc.subject | cracking | en |
| dc.subject | elimination | en |
| dc.title | Kinetic modelling of VOC catalytic steam pyrolysis for tar abatement phenomena in gasification/pyrolysis technologies | en |
| heal.abstract | Tar elimination and hot-gas conditioning in thermochemical conversion processes, i.e. thermal gasification, pyrolysis of heterogeneous materials involved two main classes of catalysts and/or additives: metallic and mineral oxides. This communication focused on the experimental kinetic data on catalytic steam cracking of vaporized toluene (PC7H8 = 0.93-1.15 kPa, H2O/C7H8 = 2.67 mol/mol, space-time tau = 0.067-0.127 kg h (Nm(3))(-1)) as a tar-derived species and/or Volatile Organic Compound (VOC). Toluene (C7H8) has been chosen as a model formula for reactive tar-derived one-ring species determined from tar constituents. Gaseous product distribution data were obtained at atmospheric pressure (101.3 kPa). steam pyrolysis temperature range of 923-1223 K and GHSV 1200-2300 Nm(3) (m(3)h)(-1). The overall catalytic pyrolysis of toluene over a commercial available metal based catalyst NiMo/gamma-Al2O3 was compared to the pyrolysis in presence of basic non-metallic mineral additives. i.e. Norwegian (Norsk Hydro) dolomitic magnesium oxide [MgO], Swedish low surface quicklime [CaO]. and calcined dolomite [CaM2(O)(2)]. The operational conditions were applied without internal or external mass-transfer limitations. Kinetics for the pyrolysis could be described by first-order reactions for all the studied additives. The influence of hydrogen gas (30 vol%, tau = 0.150 kg h (Nm)(-1)) and water vapor (P-H2O = 4.51-21.41 kPa, tau = 0.092-0.270 kg h (Nm(3))(-1)) in vaporized toluene cracking runs over low surface quicklime [CaO] was determined. A mechanistic model of the Langmuir-Hinshelwood type describing toluene decomposition was also developed. (C) 2003 Elsevier Ltd. All rights reserved. | en |
| heal.access | campus | - |
| heal.fullTextAvailability | TRUE | - |
| heal.identifier.primary | DOI 10.1016/j.fuel.2003.11.010 | - |
| heal.identifier.secondary | <Go to ISI>://000221067700014 | - |
| heal.identifier.secondary | http://ac.els-cdn.com/S0016236103004046/1-s2.0-S0016236103004046-main.pdf?_tid=9844351cb70bded83a691644392026f5&acdnat=1333031498_7fbf3d8a0df52d755c935720c087de1b | - |
| heal.journalName | Fuel | en |
| heal.journalType | peer reviewed | - |
| heal.language | en | - |
| heal.publicationDate | 2004 | - |
| heal.recordProvider | Πανεπιστήμιο Ιωαννίνων. Σχολή Θετικών Επιστημών. Τμήμα Χημείας | el |
| heal.type | journalArticle | - |
| heal.type.el | Άρθρο Περιοδικού | el |
| heal.type.en | Journal article | en |
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