Optimization of the production of biodiesel by a commercial immobilized lipase in a solvent-free system using a response surface methodology
Optimizovanje postupka proizvodnje biodizela komercijalnom lipazom u sistemu bez organskog rastvarača primenom metodologije odzivnih površina
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Response surface methodology was used for the evaluation of the effects of various factors on the synthesis of biodiesel catalyzed with immobilized lipase from Rhizomucor miehei in a solvent-free system. The production of biodiesel was optimized and model response equations were obtained, enabling the prediction of biodiesel production from the values of the four main factors. It would seem that the reaction temperature and the amount of water predominantly determined the conversion process while the methanol/oil molar ratio had no significant influence on the reaction rate. The temperature and amount of water showed negative interactive effects on the observed reaction rate per amount of enzyme. However, there were no significant interactions among the other variables according to the test of statistical significance. The highest yield of 10.15 mol kg-1 enzyme was observed at 45°C with a 6:1 methanol to oil molar ratio and with no added water in the system.
Cilj ovog rada bila je optimizacija procesa sinteze biodizela korišćenjem imobilisane lipaze iz Rhizomucor miehei. U ovom radu ispitan je uticaj osnovnih procesnih parametara na prinos biodizela: temperature, molarnog odnosa metanol/ulje, koncentracije enzima i koncentracije vode u sistemu bez organskog rastvarača. Optimizacija procesa enzimske sinteze je izvršena korišćenjem rotatabilnog kompozicionog plana. Za obradu podataka korišćena je metodologija odzivnih površina. Ustanovljeno je da se uticaj faktora na brzinu enzimske reakcije može opisati modelom drugog reda sa tri faktora, bez međusobne interakcije. Statistička analiza pokazuje da je najznačajniji parametar količina enzima u reakcionoj smeši. Povišena temperatura je imala negativan uticaj na brzinu enzimske reakcije, kao i povećana koncentracija vode. Za analizu uticaja različitih faktora na brzinu enzimske reakcije po količini enzima, dobijen je model drugog reda, sa dva značajna parametra sa međusobnom interakcijom. Iz mod...ela se vidi da je model izuzetno stabilan pri malom sadržaju vode, a da reakciji pogoduje velika količina vode samo pri niskim temperaturama. Najveći prinos, od 10,15 mol kg-1 enzima, ostvaren je pri sledećim parametrima reakcije: 45°C, molarniodnos metanol/ulje 6:1 i bez dodate vode u sistem.
Ključne reči:
lipases from Rhizomucor miehei / biodiesel / response surface methodology (RSM)Izvor:
Journal of the Serbian Chemical Society, 2008, 73, 2, 147-156Izdavač:
- Serbian Chemical Society, Belgrade
Institucija/grupa
Tehnološko-metalurški fakultetTY - JOUR AU - Ognjanović, Nevena AU - Bezbradica, Dejan AU - Knežević, Zorica PY - 2008 UR - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/1297 AB - Response surface methodology was used for the evaluation of the effects of various factors on the synthesis of biodiesel catalyzed with immobilized lipase from Rhizomucor miehei in a solvent-free system. The production of biodiesel was optimized and model response equations were obtained, enabling the prediction of biodiesel production from the values of the four main factors. It would seem that the reaction temperature and the amount of water predominantly determined the conversion process while the methanol/oil molar ratio had no significant influence on the reaction rate. The temperature and amount of water showed negative interactive effects on the observed reaction rate per amount of enzyme. However, there were no significant interactions among the other variables according to the test of statistical significance. The highest yield of 10.15 mol kg-1 enzyme was observed at 45°C with a 6:1 methanol to oil molar ratio and with no added water in the system. AB - Cilj ovog rada bila je optimizacija procesa sinteze biodizela korišćenjem imobilisane lipaze iz Rhizomucor miehei. U ovom radu ispitan je uticaj osnovnih procesnih parametara na prinos biodizela: temperature, molarnog odnosa metanol/ulje, koncentracije enzima i koncentracije vode u sistemu bez organskog rastvarača. Optimizacija procesa enzimske sinteze je izvršena korišćenjem rotatabilnog kompozicionog plana. Za obradu podataka korišćena je metodologija odzivnih površina. Ustanovljeno je da se uticaj faktora na brzinu enzimske reakcije može opisati modelom drugog reda sa tri faktora, bez međusobne interakcije. Statistička analiza pokazuje da je najznačajniji parametar količina enzima u reakcionoj smeši. Povišena temperatura je imala negativan uticaj na brzinu enzimske reakcije, kao i povećana koncentracija vode. Za analizu uticaja različitih faktora na brzinu enzimske reakcije po količini enzima, dobijen je model drugog reda, sa dva značajna parametra sa međusobnom interakcijom. Iz modela se vidi da je model izuzetno stabilan pri malom sadržaju vode, a da reakciji pogoduje velika količina vode samo pri niskim temperaturama. Najveći prinos, od 10,15 mol kg-1 enzima, ostvaren je pri sledećim parametrima reakcije: 45°C, molarniodnos metanol/ulje 6:1 i bez dodate vode u sistem. PB - Serbian Chemical Society, Belgrade T2 - Journal of the Serbian Chemical Society T1 - Optimization of the production of biodiesel by a commercial immobilized lipase in a solvent-free system using a response surface methodology T1 - Optimizovanje postupka proizvodnje biodizela komercijalnom lipazom u sistemu bez organskog rastvarača primenom metodologije odzivnih površina EP - 156 IS - 2 SP - 147 VL - 73 UR - https://hdl.handle.net/21.15107/rcub_technorep_1297 ER -
@article{ author = "Ognjanović, Nevena and Bezbradica, Dejan and Knežević, Zorica", year = "2008", abstract = "Response surface methodology was used for the evaluation of the effects of various factors on the synthesis of biodiesel catalyzed with immobilized lipase from Rhizomucor miehei in a solvent-free system. The production of biodiesel was optimized and model response equations were obtained, enabling the prediction of biodiesel production from the values of the four main factors. It would seem that the reaction temperature and the amount of water predominantly determined the conversion process while the methanol/oil molar ratio had no significant influence on the reaction rate. The temperature and amount of water showed negative interactive effects on the observed reaction rate per amount of enzyme. However, there were no significant interactions among the other variables according to the test of statistical significance. The highest yield of 10.15 mol kg-1 enzyme was observed at 45°C with a 6:1 methanol to oil molar ratio and with no added water in the system., Cilj ovog rada bila je optimizacija procesa sinteze biodizela korišćenjem imobilisane lipaze iz Rhizomucor miehei. U ovom radu ispitan je uticaj osnovnih procesnih parametara na prinos biodizela: temperature, molarnog odnosa metanol/ulje, koncentracije enzima i koncentracije vode u sistemu bez organskog rastvarača. Optimizacija procesa enzimske sinteze je izvršena korišćenjem rotatabilnog kompozicionog plana. Za obradu podataka korišćena je metodologija odzivnih površina. Ustanovljeno je da se uticaj faktora na brzinu enzimske reakcije može opisati modelom drugog reda sa tri faktora, bez međusobne interakcije. Statistička analiza pokazuje da je najznačajniji parametar količina enzima u reakcionoj smeši. Povišena temperatura je imala negativan uticaj na brzinu enzimske reakcije, kao i povećana koncentracija vode. Za analizu uticaja različitih faktora na brzinu enzimske reakcije po količini enzima, dobijen je model drugog reda, sa dva značajna parametra sa međusobnom interakcijom. Iz modela se vidi da je model izuzetno stabilan pri malom sadržaju vode, a da reakciji pogoduje velika količina vode samo pri niskim temperaturama. Najveći prinos, od 10,15 mol kg-1 enzima, ostvaren je pri sledećim parametrima reakcije: 45°C, molarniodnos metanol/ulje 6:1 i bez dodate vode u sistem.", publisher = "Serbian Chemical Society, Belgrade", journal = "Journal of the Serbian Chemical Society", title = "Optimization of the production of biodiesel by a commercial immobilized lipase in a solvent-free system using a response surface methodology, Optimizovanje postupka proizvodnje biodizela komercijalnom lipazom u sistemu bez organskog rastvarača primenom metodologije odzivnih površina", pages = "156-147", number = "2", volume = "73", url = "https://hdl.handle.net/21.15107/rcub_technorep_1297" }
Ognjanović, N., Bezbradica, D.,& Knežević, Z.. (2008). Optimization of the production of biodiesel by a commercial immobilized lipase in a solvent-free system using a response surface methodology. in Journal of the Serbian Chemical Society Serbian Chemical Society, Belgrade., 73(2), 147-156. https://hdl.handle.net/21.15107/rcub_technorep_1297
Ognjanović N, Bezbradica D, Knežević Z. Optimization of the production of biodiesel by a commercial immobilized lipase in a solvent-free system using a response surface methodology. in Journal of the Serbian Chemical Society. 2008;73(2):147-156. https://hdl.handle.net/21.15107/rcub_technorep_1297 .
Ognjanović, Nevena, Bezbradica, Dejan, Knežević, Zorica, "Optimization of the production of biodiesel by a commercial immobilized lipase in a solvent-free system using a response surface methodology" in Journal of the Serbian Chemical Society, 73, no. 2 (2008):147-156, https://hdl.handle.net/21.15107/rcub_technorep_1297 .