A CaO/zeolite-based catalyst obtained from waste chicken eggshell and coal fly ash for biodiesel production
Само за регистроване кориснике
2020
Аутори
Pavlović, Stefan M.Marinković, Dalibor
Kostić, Milan D.
Janković-Častvan, Ivona
Mojović, Ljiljana
Stanković, Miroslav
Veljković, Vlada B.
Чланак у часопису (Објављена верзија)
Метаподаци
Приказ свих података о документуАпстракт
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 gis-mondine and the crystallographic modification of calcium silicate (alpha'-dicalcium silicate) with deposited CaO. The characteristics of the synthesized catalyst were determined using ED-XRF, XRD, FT-IR, SEM, Hg-porosimetry, N-2-physisorption, LDPSA, and Hammett indicators. The CaO/FA-ZM catalyst exhibited a high activity (97.8% of FAME for only 30 min) an...d stability (a negligible drop in activity in five consecutive cycles) in the methanolysis reaction under the optimal reaction conditions (temperature of 60 degrees 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 (R-2 gt 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.
Кључне речи:
Biodiesel / Fly ash / Zeolitic material / Eggshell / Methanolysis / Kinetic modelingИзвор:
Fuel, 2020, 267Издавач:
- Elsevier Sci Ltd, Oxford
Финансирање / пројекти:
- Наноструктурни функционални и композитни материјали у каталитичким и сорпционим процесима (RS-MESTD-Integrated and Interdisciplinary Research (IIR or III)-45001)
- Serbian Academy of Sciences and Arts [F-78]
DOI: 10.1016/j.fuel.2020.117171
ISSN: 0016-2361
WoS: 000514171800001
Scopus: 2-s2.0-85078715683
Институција/група
Tehnološko-metalurški fakultetTY - JOUR AU - Pavlović, Stefan M. AU - Marinković, Dalibor AU - Kostić, Milan D. AU - Janković-Častvan, Ivona AU - Mojović, Ljiljana AU - Stanković, Miroslav AU - Veljković, Vlada B. PY - 2020 UR - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/4481 AB - 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 gis-mondine and the crystallographic modification of calcium silicate (alpha'-dicalcium silicate) with deposited CaO. The characteristics of the synthesized catalyst were determined using ED-XRF, XRD, FT-IR, SEM, Hg-porosimetry, N-2-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 degrees 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 (R-2 gt 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. PB - Elsevier Sci Ltd, Oxford T2 - Fuel T1 - A CaO/zeolite-based catalyst obtained from waste chicken eggshell and coal fly ash for biodiesel production VL - 267 DO - 10.1016/j.fuel.2020.117171 ER -
@article{ author = "Pavlović, Stefan M. and Marinković, Dalibor and Kostić, Milan D. and Janković-Častvan, Ivona and Mojović, Ljiljana and Stanković, Miroslav and Veljković, Vlada B.", year = "2020", 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 gis-mondine and the crystallographic modification of calcium silicate (alpha'-dicalcium silicate) with deposited CaO. The characteristics of the synthesized catalyst were determined using ED-XRF, XRD, FT-IR, SEM, Hg-porosimetry, N-2-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 degrees 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 (R-2 gt 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.", publisher = "Elsevier Sci Ltd, Oxford", journal = "Fuel", title = "A CaO/zeolite-based catalyst obtained from waste chicken eggshell and coal fly ash for biodiesel production", volume = "267", doi = "10.1016/j.fuel.2020.117171" }
Pavlović, S. M., Marinković, D., Kostić, M. D., Janković-Častvan, I., Mojović, L., Stanković, M.,& Veljković, V. B.. (2020). A CaO/zeolite-based catalyst obtained from waste chicken eggshell and coal fly ash for biodiesel production. in Fuel Elsevier Sci Ltd, Oxford., 267. https://doi.org/10.1016/j.fuel.2020.117171
Pavlović SM, Marinković D, Kostić MD, Janković-Častvan I, Mojović L, Stanković M, Veljković VB. A CaO/zeolite-based catalyst obtained from waste chicken eggshell and coal fly ash for biodiesel production. in Fuel. 2020;267. doi:10.1016/j.fuel.2020.117171 .
Pavlović, Stefan M., Marinković, Dalibor, Kostić, Milan D., Janković-Častvan, Ivona, Mojović, Ljiljana, Stanković, Miroslav, Veljković, Vlada B., "A CaO/zeolite-based catalyst obtained from waste chicken eggshell and coal fly ash for biodiesel production" in Fuel, 267 (2020), https://doi.org/10.1016/j.fuel.2020.117171 . .