MODELOS CINÉTICOS LHHW PARA LA ALQUILACIÓN DE GUAYACOL CON CICLOHEXANOL EN FASE LÍQUIDA

NICOLÁS BERTERO; MARDELLY KATERYNE MONTAÑEZ-VALENCIA; CRISTINA LILIANA PADRÓ; MARÍA EUGENIA SAD

Congreso; XXVIII CONGRESSO IBERO-AMERICANO DE CATÁLISE; 2022

In this work, the kinetic modeling of the liquid-phase guaiacol (G) alkylation with cyclohexanol (CHOL) over Amberlyst 36 resin at 353 K and 1 atm was carried out. Initially, the CHOL dehydrates into cyclohexene (CH) and then it can react with G to produce cyclohexyl-2-methoxyphenylether (CHMFE) by O-alkylation or cyclohexyl-2-methoxyphenol isomers (CHMF) by C-alkylation. Furthermore, CHMFE can isomerize to CHMF. The C-alkylation products are important intermediaries for the production of resins, antioxidants, drugs, polymeric additives, agrochemicals, etc. Several kinetic expressions using LangmuirHinshelwood-Hougen-Watson (LHHW) models were proposed varying the limiting step of the CHOL dehydration rate. The selected kinetic model that satisfactorily fits experimental data from a physical and statistical point of view corresponds simultaneously to two different models with the rate limiting step: (a) CHOL adsorption or (b) surface chemical reaction. The rate limiting steps for both the O-alkylation and Calkylation was the surface chemical reaction between adsorbed G and adsorbed CH, whereas in the case of the isomerization of CHMFE was the CHMFE adsorption.