dc.creator | Pavlović, Stefan | |
dc.creator | Marinković, Dalibor | |
dc.creator | Kostić, Milan | |
dc.creator | Janković-Častvan, Ivona | |
dc.creator | Mojović, Ljiljana | |
dc.creator | Stanković, Miroslav | |
dc.creator | Veljković, Vlada B. | |
dc.date.accessioned | 2020-02-25T09:18:15Z | |
dc.date.available | 2020-02-25T09:18:15Z | |
dc.date.issued | 2020 | |
dc.identifier.issn | 0016-2361 | |
dc.identifier.uri | https://cer.ihtm.bg.ac.rs/handle/123456789/3423 | |
dc.description.abstract | The present paper is focused on the development of a new environment-friendly methanolysis catalyst completely
based on waste materials: lignite coal fly ash and chicken eggshells. A novel catalyst based on CaO
supported on a fly ash-based zeolitic material (CaO/FA-ZM) was obtained from a cancrinite-sodalite group
zeolite-like material (vishnevite type) and active CaO by alkali activation in a new miniature autoclave reactor
system and hydration-dehydration. Agitation by rotation of the entire reaction mixture led to a more homogeneous
zeolitic product and saved both time and energy. The obtained catalyst structure corresponds to gismondine
and the crystallographic modification of calcium silicate (α’-dicalcium silicate) with deposited CaO.
The characteristics of the synthesized catalyst were determined using ED-XRF, XRD, FT-IR, SEM, Hg-porosimetry,
N2-physisorption, LDPSA, and Hammett indicators. The CaO/FA-ZM catalyst exhibited a high activity
(97.8% of FAME for only 30 min) and stability (a negligible drop in activity in five consecutive cycles) in the
methanolysis reaction under the optimal reaction conditions (temperature of 60 °C, methanol/oil molar ratio of
6:1, and catalyst concentration of 6 wt%). A kinetic study was performed using two different mechanisms: the
irreversible pseudo-first-order reaction mechanism in two regimes (heterogeneous and homogeneous) and the
changing mechanism combined with the triacylglycerol mass transfer limitation. Both models showed a satisfactory
agreement between the experimental and predicted values of conversion degree (R2 > 0.93), confirming
their validity for the CaO-based heterogeneously catalyzed methanolysis. The values of the activation
energy calculated for both mechanisms were 67.17 and 58.03 kJ mol−1, respectively. | en |
dc.language.iso | en | sr |
dc.publisher | Elsevier | sr |
dc.relation | info:eu-repo/grantAgreement/MESTD/Integrated and Interdisciplinary Research (IIR or III)/45001/RS// | sr |
dc.relation | Serbian Academy of Sciences and Arts (the project F-78) | sr |
dc.rights | restrictedAccess | sr |
dc.source | Fuel | sr |
dc.subject | Biodiesel | sr |
dc.subject | Fly ash | sr |
dc.subject | Zeolitic material | sr |
dc.subject | Eggshell | sr |
dc.subject | Methanolysis | sr |
dc.subject | Kinetic modeling | sr |
dc.title | A CaO/zeolite-based catalyst obtained from waste chicken eggshell and coal fly ash for biodiesel production | en |
dc.type | article | sr |
dc.rights.license | ARR | sr |
dcterms.abstract | Станковић, Мирослав В.; Вељковић, Влада Б.; Павловић, Стефан М.; Маринковић, Далибор М.; Костић, Милан Д.; Јанковић-Частван, Ивона М.; Мојовић, Љиљана В.; | |
dc.citation.volume | 267 | |
dc.citation.spage | 117171 | |
dc.citation.rank | aM21~ | |
dc.identifier.doi | 10.1016/j.fuel.2020.117171 | |
dc.identifier.scopus | 2-s2.0-85078715683 | |
dc.identifier.wos | 000514171800001 | |
dc.type.version | publishedVersion | sr |