Transient Response of a Packed Column to Changes in Liquid and Gas Flow Rate

1969 ◽  
Vol 8 (3) ◽  
pp. 324-333 ◽  
Author(s):  
Chaim Gilath ◽  
Leonard M. Naphtali ◽  
William Resnick
Keyword(s):  
Transient Response ◽  
Flow Rate ◽  
Gas Flow ◽  
Packed Column ◽  
Gas Flow Rate

scholarly journals Absorber Sizing and Costing Required to Control SO2 Emission from A Combustion System

2019 ◽  
Vol 4 (12) ◽  
pp. 1-5
Author(s):  
N. Harry-Ngei ◽  
A. A. Ujile ◽  
P. N. Ede
Keyword(s):  
Flow Rate ◽  
Gas Flow ◽  
Packed Column ◽  
Packing Material ◽  
Column Height ◽  
Combustion System ◽  
Gas Flow Rate ◽  
So2 Emission ◽  
Column Wall ◽  
The Cost

This work was predicated on the design and costing of a packed column absorber required to remove SO2 from an air/SO2 mixture. The absorber is intended to be developed into an already existing combustion system as a retrofit. The gas flow rate basis of the computation was 40,000Kg/h. The Onda Method was used to estimate the column height as 9m and the column diameter as 2.5m while the column wall thickness as well as the domed head thickness was found to be 9mm using the BS 5500 Standard Method. In order to limit expenses, H2O was utilized as the absorber solvent and a flow rate of 29.5Kg/s to limit solvent usage. A pressure drop of 20mmH2O/m was assumed in the design with metal pall rings of diameter 51mm and surface area of 102m2/m3 chosen as the packing material. The study estimated a profound $306,559.87 as the cost of the absorber required to remove 95% SO2 content from the combustion waste stream. 

scholarly journals Development of a New Phase Change Biogas for Renewable Energy Storage System

KnE Energy ◽  
2015 ◽  
Vol 1 (1) ◽  
pp. 115 ◽  
Author(s):  
Muhammad Kismurtono ◽  
Satriyo K.W ◽  
Roni M ◽  
Dan Wahyu A. R
Keyword(s):  
Water Column ◽  
Flow Rate ◽  
Gas Flow ◽  
Storage System ◽  
Packed Column ◽  
Isothermal Condition ◽  
Chicken Manure ◽  
Cow Dung ◽  
Co2 Removal ◽  
Gas Flow Rate

<p>The aims of this study are to decrease the concentration of organic matter are to cooking and generate electricity from biomass. The methods were the preparation of fixed dome reactor, unit of CO2 removal, preparation and fermentation of cow dung, water, chicken manure running and sampling periodically every one hour and data analysis. Therefore, CO2 must be eliminated from the biogas and the corresponding phenomena of mass transfer with chemical reaction of packed column have to be studied. This study assumed steady state and isothermal condition. The system studied consists of packed column (stainless steel 304) 10 cm in diameter filled with 2 mm in diameter bead (zeolite) to the height of 80 cm and storage system of methane.. The gas flow rate was held constant at F = 800 ml/s, liquid flow rate (L) was 100 ml/s, pressure (P) was varied from: 350 to 700 mm water column (WC), and the concentration of aqueous NaOH 1.5 M inlet absorbent was held constant. The results showed that the percentage of absorbed CO2 can be enhanced by increasing the pressure. Using column with packing height of 100 cm. gas flow rate of 800 ml/s, using absorbent containing NaOH1.5 M with flow rate: 100 ml/s and at pressure of 350 mm water column (WC) and temperature of 30o C , the percentage recovery of CO2 reacted was 85%. The biogas then will be used to generate electricity.</p><p><strong>Keywords</strong>: Aqueous NaOH 1.5 M, Biogas purification, CO2 removal, Storage system</p>

Absorption of Carbon Dioxide into Aqueous Ammonia Solution using Blended Promoters (MEA, MEA+PZ, PZ+ArgK, MEA+ArgK)

2020 ◽  
Vol 38 (9A) ◽  
pp. 1359-1372
Author(s):  
Farah T. Al-Sudani
Keyword(s):  
Partial Pressure ◽  
Flow Rate ◽  
Liquid Flow ◽  
Gas Flow ◽  
Absorption Rate ◽  
Liquid Flow Rate ◽  
Packed Column ◽  
Ammonia Solution ◽  
Gas Flow Rate ◽  
Co2 Partial Pressure

Absorption of CO2 into promoted-NH3 solution utilize a packed column (1.25 m long, 0.05m inside diameter) was examined in the present work. The process performance of four different blended promoters monoethanolamine (MEA)+ piperazine (PZ), piperazine (PZ)+ potassium argininate (ArgK) and monoethanolamine +potassium argininate was compared with unpromoted-NH3 solution by evaluated the absorption rate (φ_(CO_2 )) and overall mass transfer coefficient  (K_(G,CO_2.) a_v)  over the operating ranges of the studied process variables (1-15Kpa initial partial pressure of CO2, 5-15 Liter/min gas flow rate, 0.25-0.85 Liter/min liquid flow rate). The results exhibit that the absorption behavior and efficiency can be enhanced by rising volumetric liquid flow rate and initial CO2 partial pressure. However, the gas flow rate should be kept at a suitable value on the controlling gas film. Furthermore, it has been observed that the (PZ+ArgK) promoter was the major species that can accelerate the absorption rate and reached almost 66.166% up to123.23% over that of the unpromoted-NH3 solution.

SCIENTIFIC AND ENGINEERING PRINCIPLES OF EFFICIENT FUEL USE AND ENVIRONMENTALLY FRIENDLY GAS COMBUSTION IN STOVE PLATES. PART 1. MODERN STATE-OF-THE-ART AND DIRECTIONS FOR IMPROVEMENT THE GAS BURNING IN DOMESTIC GAS COOKERS

2017 ◽  
pp. 3-18 ◽  
Author(s):  
B.S. Soroka ◽  
V.V. Horupa
Keyword(s):  
Natural Gas ◽  
Flow Rate ◽  
Gas Flow ◽  
Renewable Energy Sources ◽  
Combustion Process ◽  
Orifice Diameter ◽  
Firing Process ◽  
Gas Flow Rate ◽  
Gas Combustion ◽  
Gas Stoves

Natural gas NG consumption in industry and energy of Ukraine, in recent years falls down as a result of the crisis in the country’s economy, to a certain extent due to the introduction of renewable energy sources along with alternative technologies, while in the utility sector the consumption of fuel gas flow rate enhancing because of an increase the number of consumers. The natural gas is mostly using by domestic purpose for heating of premises and for cooking. These items of the gas utilization in Ukraine are already exceeding the NG consumption in industry. Cooking is proceeding directly in the living quarters, those usually do not meet the requirements of the Ukrainian norms DBN for the ventilation procedures. NG use in household gas stoves is of great importance from the standpoint of controlling the emissions of harmful components of combustion products along with maintenance the satisfactory energy efficiency characteristics of NG using. The main environment pollutants when burning the natural gas in gas stoves are including the nitrogen oxides NOx (to a greater extent — highly toxic NO2 component), carbon oxide CO, formaldehyde CH2O as well as hydrocarbons (unburned UHC and polyaromatic PAH). An overview of environmental documents to control CO and NOx emissions in comparison with the proper norms by USA, EU, Russian Federation, Australia and China, has been completed. The modern designs of the burners for gas stoves are considered along with defining the main characteristics: heat power, the natural gas flow rate, diameter of gas orifice, diameter and spacing the firing openings and other parameters. The modern physical and chemical principles of gas combustion by means of atmospheric ejection burners of gas cookers have been analyzed from the standpoints of combustion process stabilization and of ensuring the stability of flares. Among the factors of the firing process destabilization within the framework of analysis above mentioned, the following forms of unstable combustion/flame unstabilities have been considered: flashback, blow out or flame lifting, and the appearance of flame yellow tips. Bibl. 37, Fig. 11, Tab. 7.

On the Influence of Fluctuating Flow Rate Upon the Performance and Behaviour of Isothermal Reacting Systems

1998 ◽  
Vol 63 (6) ◽  
pp. 881-898
Author(s):  
Otakar Trnka ◽  
Miloslav Hartman
Keyword(s):  
Flow Rate ◽  
Gas Flow ◽  
Fluidized Bed Reactor ◽  
Computational Techniques ◽  
Continuous Stirred Tank Reactor ◽  
Gas Flow Rate ◽  
Solid Reaction ◽  
Continuous Stirred Tank ◽  
And Performance ◽  
Reacting Systems

Three simple computational techniques are proposed and employed to demonstrate the effect of fluctuating flow rate of feed on the behaviour and performance of an isothermal, continuous stirred tank reactor (CSTR). A fluidized bed reactor (FBR), in which a non-catalytic gas-solid reaction occurs, is also considered. The influence of amplitude and frequency of gas flow rate fluctuations on reactant concentrations at the exit of the CSTR is shown in four different situations.

scholarly journals Investigation on influences of loose gas on gas-solid flows in a circulating fluidized bed (CFB) reactor using full-loop numerical simulation

2020 ◽  
Vol 0 (0) ◽  
Author(s):  
Pengju Huo ◽  
Xiaohong Li ◽  
Yang Liu ◽  
Haiying Qi
Keyword(s):  
Numerical Simulation ◽  
Flow Rate ◽  
Gas Flow ◽  
Circulating Fluidized Bed ◽  
Separation Efficiency ◽  
Circulation Rate ◽  
Solid Mass ◽  
Gas Flow Rate ◽  
Gas Leakage ◽  
Mass Circulation

AbstractThe influences of loose gas on gas-solid flows in a large-scale circulating fluidized bed (CFB) gasification reactor were investigated using full-loop numerical simulation. The two-fluid model was coupled with the QC-energy minimization in multi-scale theory (EMMS) gas-solid drag model to simulate the fluidization in the CFB reactor. Effects of the loose gas flow rate, Q, on the solid mass circulation rate and the cyclone separation efficiency were analyzed. The study found different effects depending on Q: First, the particles in the loop seal and the standpipe tended to become more densely packed with decreasing loose gas flow rate, leading to the reduction in the overall circulation rate. The minimum Q that can affect the solid mass circulation rate is about 2.5% of the fluidized gas flow rate. Second, the sealing gas capability of the particles is enhanced as the loose gas flow rate decreases, which reduces the gas leakage into the cyclones and improves their separation efficiency. The best loose gas flow rates are equal to 2.5% of the fluidized gas flow rate at the various supply positions. In addition, the cyclone separation efficiency is correlated with the gas leakage to predict the separation efficiency during industrial operation.

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