Heat Transfer Studies in Ejector-induced Downflow Bubble Column
-
Rohit B. Meshram
,
Gautam Kundu
Abstract
Temperature control in bubble columns is of great importance, since chemical reactions in many of the chemical, pharmaceutical, fertilizer, etc. industries are usually accompanied by heat supply or heat removal operations. In the present research work, the heat transfer coefficient of a two-phase co-current vertical downflow bubble column (i.d. 0.05 m×1.6 m height) was evaluated. Experimental studies were carried out to calculate the heat transfer coefficient for operating temperature ranges from 60 °C to 90 °C. The effects of the superficial gas velocity (4.25×10–3 to 9.58×10–3 m/s), liquid velocity (8.50×10–2 to 16.98×10–2 m/s), gas holdup, and axial position were investigated. Empirical correlation was developed, based on a multiple regression analysis to calculate a heat transfer coefficient as a function of dimensionless numbers, including the Reynolds number, the Prandtl number, and the Froude number.
Funding statement: This research work was supported by the Chemical Engineering Department, Indian Institute of Technology, Kharagpur, India.
Nomenclature
- Cpl
Specific heat of liquid (J/kg °C)
- dc
Diameter of column (m)
- Fr
Froude number
- g
Acceleration due to gravity (m/s2)
- h
Heat transfer coefficient (W/ m2 °C)
- kl
Thermal conductivity of liquid (W/m °C)
- k1 to k5
Indices in eq. (2)
- L
Length of contactor (m)
- Pr
Prandtl number
- Re
Reynolds number
- St
Stanton number
- Ug
Superficial gas velocity (m/s)
- Ul
Superficial liquid velocity (m/s)
- Greek Letters
- εg
Gas holdup (-)
- μl
Viscosity of liquid (kg/m sec)
- ρl
Density of liquid (kg/m3)
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©2016 by De Gruyter
Articles in the same Issue
- Frontmatter
- Catalytic Activity of Bimetallic Cu-Ag/MgO-SiO2 Toward the Conversion of Ethanol to 1,3-Butadiene
- Heat Transfer Studies in Ejector-induced Downflow Bubble Column
- Experimental Study on Atomizing and Reaction Performance of Pressure Swirl Nozzles in Ethoxylation Reactor
- Study of the Hydrodynamics and Mass Transfer Coefficient in a 2D Mimicked FT Slurry Bubble Columns for Alternative Clean Energy and Chemical Production
- Simultaneous Removal of Organic and Inorganic Pollutants From Landfill Leachate Using Sea Mango Derived Activated Carbon via Microwave Induced Activation
- Computational Fluid Dynamics Simulations of Lean Premixed Methane-Air Flame in a Micro-Channel Reactor Using Different Chemical Kinetics
- Membrane Aerated Biofilm Reactors for Thermomechanical Pulping Pressate Treatment
- Mixing of Shear Thinning Fluids in Cylindrical Tanks: Effect of the Impeller Blade Design and Operating Conditions
- Influence of Support Structural Characteristics on Long-term Performance of Pd-Ag/α-Al2O3 Catalyst for Tail-end Acetylene Selective Hydrogenation
- Investigation of Key Factors and Their Interactions in MTO Reaction by Statistical Design of Experiments
- Hydrogen Production via Glycerol Reforming over Pt/SiO2 Nanocatalyst in a Spiral-Shaped Microchannel Reactor
- Experimental Design-Assisted Investigation of Light Olefins Production Over Ceria-Altered HZSM-5 Catalysts by Naphtha Catalytic Steam Cracking
- Investigation of α-Amylase Production with Bacillus amyloliquefaciens in a Cocurrent Downflow Contacting Reactor
- Gaseous Hydrocarbon Synfuels from Renewable Electricity via H2/CO2-Flexibility of Fixed-Bed Catalytic Reactors
- Natural Convective Flow Analysis For Nanofluids With Reynold,s Model of Viscosity
Articles in the same Issue
- Frontmatter
- Catalytic Activity of Bimetallic Cu-Ag/MgO-SiO2 Toward the Conversion of Ethanol to 1,3-Butadiene
- Heat Transfer Studies in Ejector-induced Downflow Bubble Column
- Experimental Study on Atomizing and Reaction Performance of Pressure Swirl Nozzles in Ethoxylation Reactor
- Study of the Hydrodynamics and Mass Transfer Coefficient in a 2D Mimicked FT Slurry Bubble Columns for Alternative Clean Energy and Chemical Production
- Simultaneous Removal of Organic and Inorganic Pollutants From Landfill Leachate Using Sea Mango Derived Activated Carbon via Microwave Induced Activation
- Computational Fluid Dynamics Simulations of Lean Premixed Methane-Air Flame in a Micro-Channel Reactor Using Different Chemical Kinetics
- Membrane Aerated Biofilm Reactors for Thermomechanical Pulping Pressate Treatment
- Mixing of Shear Thinning Fluids in Cylindrical Tanks: Effect of the Impeller Blade Design and Operating Conditions
- Influence of Support Structural Characteristics on Long-term Performance of Pd-Ag/α-Al2O3 Catalyst for Tail-end Acetylene Selective Hydrogenation
- Investigation of Key Factors and Their Interactions in MTO Reaction by Statistical Design of Experiments
- Hydrogen Production via Glycerol Reforming over Pt/SiO2 Nanocatalyst in a Spiral-Shaped Microchannel Reactor
- Experimental Design-Assisted Investigation of Light Olefins Production Over Ceria-Altered HZSM-5 Catalysts by Naphtha Catalytic Steam Cracking
- Investigation of α-Amylase Production with Bacillus amyloliquefaciens in a Cocurrent Downflow Contacting Reactor
- Gaseous Hydrocarbon Synfuels from Renewable Electricity via H2/CO2-Flexibility of Fixed-Bed Catalytic Reactors
- Natural Convective Flow Analysis For Nanofluids With Reynold,s Model of Viscosity
