skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: ADVANCED DIAGNOSTIC TECHNIQUES FOR THREE-PHASE SLURRY BUBBLE COLUMN REACTORS (SBCR)

Abstract

This report summarizes the accomplishment made during the second year of this cooperative research effort between Washington University, Ohio State University and Air Products and Chemicals. The technical difficulties that were encountered in implementing Computer Automated Radioactive Particle Tracking (CARPT) in high pressure SBCR have been successfully resolved. New strategies for data acquisition and calibration procedure have been implemented. These have been performed as a part of other projects supported by Industrial Consortium and DOE via contract DE-2295PC95051 which are executed in parallel with this grant. CARPT and Computed Tomography (CT) experiments have been performed using air-water-glass beads in 6 inch high pressure stainless steel slurry bubble column reactor at selected conditions. Data processing of this work is in progress. The overall gas holdup and the hydrodynamic parameters are measured by Laser Doppler Anemometry (LDA) in 2 inch slurry bubble column using Norpar 15 that mimic at room temperature the Fischer Tropsch wax at FT reaction conditions of high pressure and temperature. To improve the design and scale-up of bubble column, new correlations have been developed to predict the radial gas holdup and the time averaged axial liquid recirculation velocity profiles in bubble columns.

Authors:
; ;
Publication Date:
Research Org.:
Washington University (US)
Sponsoring Org.:
(US)
OSTI Identifier:
824993
DOE Contract Number:
FG26-99FT40594
Resource Type:
Technical Report
Resource Relation:
Other Information: PBD: 25 Jul 2001
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; AIR; BUBBLES; CALIBRATION; COMPUTERIZED TOMOGRAPHY; COMPUTERS; DATA ACQUISITION; DATA PROCESSING; DESIGN; DIAGNOSTIC TECHNIQUES; HYDRODYNAMICS; LASERS; OHIO; STAINLESS STEELS; VELOCITY; WASHINGTON

Citation Formats

M.H. Al-Dahhan, M.P. Dudukovic, and L.S. Fan. ADVANCED DIAGNOSTIC TECHNIQUES FOR THREE-PHASE SLURRY BUBBLE COLUMN REACTORS (SBCR). United States: N. p., 2001. Web. doi:10.2172/824993.
M.H. Al-Dahhan, M.P. Dudukovic, & L.S. Fan. ADVANCED DIAGNOSTIC TECHNIQUES FOR THREE-PHASE SLURRY BUBBLE COLUMN REACTORS (SBCR). United States. doi:10.2172/824993.
M.H. Al-Dahhan, M.P. Dudukovic, and L.S. Fan. 2001. "ADVANCED DIAGNOSTIC TECHNIQUES FOR THREE-PHASE SLURRY BUBBLE COLUMN REACTORS (SBCR)". United States. doi:10.2172/824993. https://www.osti.gov/servlets/purl/824993.
@article{osti_824993,
title = {ADVANCED DIAGNOSTIC TECHNIQUES FOR THREE-PHASE SLURRY BUBBLE COLUMN REACTORS (SBCR)},
author = {M.H. Al-Dahhan and M.P. Dudukovic and L.S. Fan},
abstractNote = {This report summarizes the accomplishment made during the second year of this cooperative research effort between Washington University, Ohio State University and Air Products and Chemicals. The technical difficulties that were encountered in implementing Computer Automated Radioactive Particle Tracking (CARPT) in high pressure SBCR have been successfully resolved. New strategies for data acquisition and calibration procedure have been implemented. These have been performed as a part of other projects supported by Industrial Consortium and DOE via contract DE-2295PC95051 which are executed in parallel with this grant. CARPT and Computed Tomography (CT) experiments have been performed using air-water-glass beads in 6 inch high pressure stainless steel slurry bubble column reactor at selected conditions. Data processing of this work is in progress. The overall gas holdup and the hydrodynamic parameters are measured by Laser Doppler Anemometry (LDA) in 2 inch slurry bubble column using Norpar 15 that mimic at room temperature the Fischer Tropsch wax at FT reaction conditions of high pressure and temperature. To improve the design and scale-up of bubble column, new correlations have been developed to predict the radial gas holdup and the time averaged axial liquid recirculation velocity profiles in bubble columns.},
doi = {10.2172/824993},
journal = {},
number = ,
volume = ,
place = {United States},
year = 2001,
month = 7
}

Technical Report:

Save / Share:
  • This report summarizes the accomplishment made during the third year of this cooperative research effort between Washington University, Ohio State University and Air Products and Chemicals. Data processing of the performed Computer Automated Radioactive Particle Tracking (CARPT) experiments in 6 inch column using air-water-glass beads (150 {micro}m) system has been completed. Experimental investigation of time averaged three phases distribution in air-Therminol LT-glass beads (150 {micro}m) system in 6 inch column has been executed. Data processing and analysis of all the performed Computed Tomography (CT) experiments have been completed, using the newly proposed CT/Overall gas holdup methodology. The hydrodynamics of air-Norparmore » 15-glass beads (150 {micro}m) have been investigated in 2 inch slurry bubble column using Dynamic Gas Disengagement (DGD), Pressure Drop fluctuations, and Fiber Optic Probe. To improve the design and scale-up of bubble column reactors, a correlation for overall gas holdup has been proposed based on Artificial Neural Network and Dimensional Analysis.« less
  • This report summarizes the accomplishment made during the first year of this cooperative research effort between Washington University, Ohio State University and Air Products and Chemicals. A technical review of the variables affecting the SBCR performance, some aspects of bubble dynamics and hydrodynamics properties and physical properties of FT waxes and catalyst have been performed. The needed experimental facilities and measurement techniques have been evaluated and prepared. Exxon Norpar 14 has been suggested as a solvent to be used that mimics at room temperature and pressure up to 200 psi the hydrodynamics of FT waxes. A new correlation has beenmore » developed and tested to predict gas-liquid mass transfer coefficient at high pressure operation based on high pressure gas holdup and atmospheric data of gas-liquid mass transfer coefficient.« less
  • This report describes results of a study on hydrodynamics of three-phase bubble columns for Fischer-Tropsch synthesis. Experiments were conducted in two stainless bubble columns of 0.05 m and 0.21 m in diameter and 3 m tall, at 265{degrees}C and atmospheric pressure using nitrogen gas and two types of liquid medium (hydrotreated reactor wax designated FT-300, and raw reactor wax from fixed bed rectors at SASOL). The effects of solids types (iron oxide and silica), concentration (0--30 wt %), size (0--5 {mu}m and 20--44 {mu}m), slurry (liquid) velocity (up to 0.02 m/s) on the gas holdup and axial solids concentration profiles,more » were investigated. Phase volume fractions were determined using conventional (differential pressure measurements together with determination of slurry concentration along the column) and novel (dual energy nuclear density gauge) experimental techniques. Bubble size distribution and the Sauter mean bubble diameter were obtained using the dynamic gas disengagement (DGD) method. Flow regime transitions in both columns were determined using statistical analysis of both pressure and density fluctuations. Correlations for prediction of gas holdups and axial solids dispersion coefficient have been developed from experimental data obtained in this study. Data needed for calculation of the gas-liquid interfacial area (average gas holdup and Sauter mean bubble diameter) have been presented and can be used to estimate the mass transfer rate in slurry bubble column reactors. 105 refs., 19 figs., 38 tabs.« less
  • The major technical objectives of this program are threefold: (1) to develop the design tools and a fundamental understanding of the fluid dynamics of a slurry bubble column reactor to maximize reactor productivity, (2) to develop the mathematical reactor design models and gain an understanding of the hydrodynamic fundamentals under industrially relevant process conditions, and (3) to develop an understanding of the hydrodynamics and their interaction with the chemistries occurring in the bubble column reactor. Successful completion of these objectives will permit more efficient usage of the reactor column and tighter design criteria, increase overall reactor efficiency, and ensure amore » design that leads to stable reactor behavior when scaling up to large diameter reactors.« less
  • The major technical objectives of this program are threefold: (1) to develop the design tools and a fundamental understanding of the fluid dynamics of a slurry bubble column reactor to maximize reactor productivity, (2) to develop the mathematical reactor design models and gain an understanding of the hydrodynamic fundamentals under industrially relevant process conditions, and (3) to develop an understanding of the hydrodynamics and their interaction with the chemistries occurring in the bubble column reactor. Successful completion of these objectives will permit more efficient usage of the reactor column and tighter design criteria, increase overall reactor efficiency, and ensure amore » design that leads to stable reactor behavior when scaling up to large diameter reactors.« less