Results 1 to 10 of about 120,928 (230)

Comprehensive Analysis of the Overall Gas Holdup Profiles in Various Air-Water Bubble Columns

Journal of Chemical Engineering of Japan
Bubble columns (BCs) are widely used gas-liquid contactors in the chemical industry. Their hydrodynamic and mass transfer performance depends on the prevailing flow regime (FR) and the gas sparger (GS) type (particularly in the homogeneous FR).
Stoyan Nedeltchev, Adam Mühlbauer, Andrea Ferrario, Nicolo Varallo, Sara Marchini, Dominic Pjontek, Mark W. Hlawitschka, Giorgio Besagni   +7 more
doaj   +4 more sources

Effects of sparger design on the gas holdup and mass transfer in a pilot scale external loop airlift reactor

South African Journal of Chemical Engineering, 2021
Three designs of static spargers were used in a pilot scale external loop airlift reactor to determine their effects on the gas holdup and mass transfer characteristics for an air-water system.
N. Naidoo, W.J. Pauck, M. Carsky
doaj   +2 more sources

Small bubbles formation and contribution to the overall gas holdup in large diameter columns of very high viscosity oil

International Journal of Multiphase Flow, 2022
A limited number of studies are available in literature on the small bubbles which create from gas-very high viscosity oils interaction and its contribution to the gas holdup in the system. The rate of small bubble formation has an important impact on heat and mass transfer in many chemical and industrial processes.
Shara K. Mohammed, Abbas H. Hasan, Georgios Dimitrakis, Barry J. Azzopardi   +3 more
openaire   +3 more sources

CFD SIMULATION OF BUBBLE COLUMN REACTOR BY INVESTIGATING THE EFFECT OF TRAYS ON OVERALL GAS HOLDUP

The Nucleus, 2020
In the current research work, CFD model has been developed to estimate overall gas holdup for co-current air-water system in a Trayed Bubble Column Reactor (TBCR), operating in bubbly flow regime. The TBCR considered in this study has 19 cm inner diameter and 274 cm length.
Arif Khan, Samrana Sharif, A. N. K. Wardag, I. R. Chughtai, M. H. Al-Dahhan   +4 more
openaire   +2 more sources

CFD Analysis of Phase Holdup Behaviour in a Gas-Liquid Bubble Column

Journal of Applied Science & Process Engineering, 2021
Experimental works on bubble column hydrodynamic are normally carried out on a laboratory scale less than 0.3 m with holes number less than 10. In this paper, we discuss several approaches to bubble column scale-up, relying on variables of parameters ...
Nur Khairunnisa Abd Halim, Siti Aslina Hussain, Mus’ab Abd. Razak, Mohd Amirul Syafiq Mohd Yunos   +3 more
doaj   +2 more sources

Modelling and optimization of an existing onshore gas gathering network using PIPESIM [PDF]

Heliyon
Pakistan has limited natural gas reserves, and most are found onshore. This article reports on the problems of an onshore gas gathering network (GGN) analysed through steady-state simulation modelling using PIPESIM software.
Iftikhar Ahmed, Aditya Prana Iswara, Shahbaz Abbas, Faheem Qaisar Jamal, Iftikhar Ahmad, Syed Tasweer Hussain Shah, Afshan Naseem   +6 more
doaj   +2 more sources

Gas Holdup and Overall Volumetric Absorption Coefficient in Bubble Columns with Suspended Solid Particles

Chemical engineering, 1972
固体粒子としてガラス球を懸濁させた塔径12.2および21.4cmの気泡塔内におけるガスホールドアップと触媒として銅イオンを含む亜硫酸ソーダ水溶液による酸素の吸収速度について実験した。ガスホールドアップおよび総括吸収容量係数におよぼす固体粒子径, 平均固体粒子濃度, ガス流速, 塔径およびガス分散器の種類などの影響を調べた。さらに, 単位塔容積当りの気液接触面積および平均気泡径の値を評価した。
Kato, Yasuo, Nishiwaki, Akio, Kago, Tokihiro, Fukuda, Takashi, Tanaka, Shigenobu   +4 more
openaire   +3 more sources

PBM-CFD Investigation of the Gas Holdup and Mass Transfer in a Lab-Scale Internal Loop Airlift Reactor

IEEE Access, 2017
This paper investigated the problem of overall gas holdup and the oxygen mass transfer in the internal loop airlift reactor by numerical modeling and experimental validation.
Shuo Zhang, Zong-Yang Lv, David Muller, Gunter Wozny   +3 more
doaj   +2 more sources

Computational fluid dynamics investigation of gas–liquid two-phase flow in aerated stirred reactors

Engineering Applications of Computational Fluid Mechanics
An extensive investigation of multiphase flow and mass transfer in aerated stirred reactors will provide methods for improving reactor performance. In this study, a computational fluid dynamics (CFD) model that characterizes gas–liquid two-phase flow in ...
Shaoqi Yu, Binxin Wu, Chun Wei
doaj   +2 more sources

Numerical Investigation into Effects of Gas Sparger and Horizontal Baffles on Hydrodynamics of Flat Bubble Column

ChemEngineering
Computational fluid dynamics (CFD) was used to investigate influence of different gas sparger configurations and the presence of horizontal baffles on hydrodynamic characteristics in a flat bubble column. CFD results of time-averaged local and global gas
Masroor Abro, Imran Nazir Unar, Junaid Korai, Abdul Qudoos, Sikandar Almani, Abdul Qadeer Laghari, Liang Yu, Abdul Sattar Jatoi   +7 more
doaj   +2 more sources