Estimation of kinetic parameters for nonisothermal food processes [Review]

摘要

This work deals with the hypothesis that kinetic parameters for nonisothermal processes can be reliably obtained using a 1-step method. Parameters were estimated for 3 typical processes: (1) no residence time distribution (RTD), (2) first-order reaction with RTD, and (3) nth-order reaction with RTD. When nonisothermal processes were approximated isothermally, k and DeltaE were underestimated 80% to 3 orders of magnitude, and 30% to 1 order of magnitude, respectively. Reaction order was overestimated by up to 0.81. Therefore, accounting for thermal history and RTD is critical to obtain accurate estimates of kinetic parameters. The I-step method was also used to solve for equivalent isothermal temperatures and times for an arbitrary nonisothermal process. [References: 51]