Mathematical Modeling of a Trickle Bed Bio-desulfurizer of Hydrotreated Diesel for theProduction of ULSD (Ultra-low Sulfur Diesel)

摘要

Biodesulfurization of hydrodesulfurized diesel has been carried out in a 600mm highrnand 66mm diameter trickle bed reactor using Rhodococcus Sp. In immobilized form. The initialrnconcentration of organo-sulfur compounds I diesel has been varied in the range of 200 to 540rnppm. LHSV has been varied in the range of 1.838 to 3.676h-1. Recycle ratio of 0.25 to 2 hasrnbeen used at LHSV of 1.838h-1. A deterministic mathematical model has been developedrnusing all kinetic and hydrodynamic parameters including 2max, maximum specific growth rate ofrnMonod type, Ks, saturation constant, Y, yield coefficient , LHSV, biofilm thickness, bed porosityrnand recycle ratio. Experimental trends have been observed to be well explained by the modelrnpredictions.