Accurate hydrogenated vegetable oil viscosity predictions for monolith reactor simulations

Abstract

h i g h l i g h t s Contribution group model to predict viscosity of partially hydrogenated edible oils. CFD simulations of a three-phase catalytic monolith reactor with viscosity change. Investigation of two-way coupling between hydrodynamics, transport and reaction. Strong limitations by mass transfer of fatty acids highlighted. Reactor performances greatly impacted by the evolution of viscosity and diffusivity.

Biodiesel and green diesel generation: an overview

“…Direct blending limitations could not be applied to other fuel properties such as density, viscosity, the concentration of water. In contrast, reductions in density may result in some fuel savings and flexibility in the refinery process [85]. They are safe for storage and transport as renewable diesel flash points are above diesel.…”

Numerical simulation of mass transfer dynamics in Taylor flows

“…Because of these constraints, simulations at application-related values of the Schmidt number around bubbles of complex shapes have a very high computational cost, hardly affordable by Direct Numerical Simulations, especially at high Péclet number where a full grid independence of the results is difficult to achieve. Additionally, several works have used idealised shapes for the Taylor bubbles [9,20,21] . However, the exact shape of the bubble can produce interface regions with locally higher or lower rates of transfer [1,22] .…”

Sunflower oil hydrogenation mechanisms and kinetics

“…TAG) diffusivity in oil, 𝜖 𝑝 and 𝜏 𝑝 are the catalyst porosity and tortuosity, respectively. Expressions of 𝐷 𝑖,𝑜𝑖𝑙 for both species in sunflower oil are available in Albrand et al [35] for a given temperature. Porosity was measured at 75% for the same catalyst support [36] and tortuosity was set to 3 as an usual value [37].…”