Abstract
The paper presents the simulation of a catalyst-paraffin oil slurry hydrodynamics under high pressure and temperature in a convex bottom reactor with a Rushton turbine which was conducted with an application of computational fluid dynamics (CFD) modeling. An analysis to obtain a uniform distribution of solid catalyst particles suspended in paraffin oil was carried out as a potential for biomass liquefaction. The effects of the particle diameter, bed density, liquid viscosity, and the initial solid loading on slurry hydrodynamics in high pressure and temperature behavior were investigated using the Eulerian–Eulerian two-fluid model and the standard k-ε turbulence model. The main objective was to assess the performance in agitating highly concentrated slurries to obtain slurry velocity, concentration, the degree of homogeneity, and to examine their effect on the mixing quality. The results of the analysis are applied to predicting the impact of the most efficient conditions on slurry suspension qualities as potential for biomass liquefaction.
Highlights
Stirred tank reactors with solid catalyst particles dispersed in a liquid are widely used in chemical industry processes such as the methanol [1,2], Fischer–Tropsch syntheses, or the oxidation of p-xylene to terephthalic acid [3,4]
The main advantage of using a stirred-tank reactor is that all particles are dispersed throughout the volume of the slurry reactor, which is a successful elimination of concentration and thermal gradients
High pressure and temperature conditions can be used in stirrer and tube reactor in technology: for coal/biomass gasification [16,17], methanol or Fischer-Tropsch synthesis, and other waste-to-energy conversion, such as biomass hydrothermal liquefaction or bio-oil production
Summary
Stirred tank reactors with solid catalyst particles dispersed in a liquid are widely used in chemical industry processes such as the methanol [1,2], Fischer–Tropsch syntheses, or the oxidation of p-xylene to terephthalic acid [3,4]. High pressure and temperature conditions can be used in stirrer and tube reactor in technology: for coal/biomass gasification [16,17], methanol or Fischer-Tropsch synthesis, and other waste-to-energy conversion, such as biomass hydrothermal liquefaction or bio-oil production. The main objective of this study was to examine the influence of high pressure and temperature in the tank reactor on the process of different concentration particle suspension, slurry homogeneity, and its mixing quality catalyst using in biomass liquefaction. Simulation studies have demonstrated a significant effect of pressure and temperature on the catalyst suspension behavior It was examined how different operating conditions such as solid loading, particle size, and the impeller speed determine the velocity and concentration fields of a suspension.
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
