Article
Engineering, Chemical
Li Dai, Zhulin Yuan, Lei Guan, Kai Wu, Conghui Gu
Summary: This study discusses the effects of liquid saturation, gas velocity, and particle size on the global fluidization dynamics of Geldart D particles, finding that increasing liquid saturation and decreasing particle size intensifies bubble dynamics, with changes in fluidization regimes as gas velocity increases.
Article
Chemistry, Applied
Maria J. San Jose, Sonia Alvarez, Raquel Lopez
Summary: The study focused on the drying performance of sawdust in conical spouted beds, analyzing the influence of various factors on drying kinetics and proposing a new drying model. Suitable design geometric factors and process conditions for high drying capacity were determined based on experimental data.
FUEL PROCESSING TECHNOLOGY
(2021)
Article
Engineering, Chemical
Xabier Sukunza, Maider Bolanos, Mikel Tellabide, Idoia Estiati, Roberto Aguado, Martin Olazar
Summary: The drying of concentrated suspensions, like kaolin, in a spouted bed can lead to particle agglomeration. Placing the atomizer at the air inlet pipe and using a fountain confiner above the bed surface can improve air-solid contact and reduce bed instabilities. Evaluations of spouted bed hydrodynamics with and without the atomizer were conducted, and drying experiments were performed in this new setup. The atomizer slightly increased the total pressure drop of the system but had minimal impact on the spouted bed hydrodynamics.
Article
Engineering, Environmental
Shuyue Li, Yongmin Zhang, Wenjie Wang, Huan Wang
Summary: This study comprehensively evaluates the effect of particle density on hydrodynamics during the initial fluidization stage. It finds that empirical correlations for high-density particles may have significant errors in predicting the minimum fluidization velocity (Umf), and the predicted errors tend to increase with increasing particle density. Furthermore, the fluidization performance tends to deteriorate as the particle density increases.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Chemistry, Physical
Mehrana R. Nejad, Amin Doostmohammadi, Julia M. Yeomans
Summary: Increasing friction enhances memory effects, resulting in persistent trails of topological defects in the director field, forming arch-like patterns. In high friction conditions, creating new defects becomes difficult, while existing defects organize into parallel arches.
Article
Mechanics
Emad Sobhani, Amir R. Masoodi, Amir Reza Ahmadi-Pari
Summary: In this paper, free vibration analysis of sandwich composite joined conical-cylindrical-conical shells is conducted using FSDT, reinforced with FG-CNTs and FG-GNPs. Different distribution patterns and boundary conditions are considered, with the GDQM method utilized to solve the PDE system. The correctness and efficiency of the proposed formulation are validated through comparison with reference solutions.
COMPOSITE STRUCTURES
(2021)
Article
Engineering, Chemical
Mahshad Manafi, Reza Zarghami, Navid Mostoufi
Summary: In gas-solid fluidized beds, particle-particle and particle-wall collisions cause charge accumulation on particles. This study evaluated the impact of fluidization time on charge transfer and bipolar charging, and their effects on hydrodynamic structures in a fluidized bed. The results show that bipolar charging is the dominant mechanism in a bed of glass beads, while the difference in work functions between wall and particle leads to high charge transfer in a bed of polyethylene particles.
Article
Chemistry, Physical
Defeng Yan, Yuhui Wang, Jiyu Liu, Danyang Zhao, Pingmei Ming, Jinlong Song
Summary: A novel method was proposed in this study to prepare conical, cylindrical, and inverted conical pillars using meniscus-confined electrochemical 3D printing. Pillar arrays with excellent superhydrophobicity were successfully fabricated on Cu substrates, enriching the theory and technology for preparing superhydrophobic pillars with variable diameters.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2021)
Article
Green & Sustainable Science & Technology
Diunay Zuliani Mantegazini, Thiago Padovani Xavier, Marcelo Silveira Bacelos
Summary: Pyrolysis is a sustainable and innovative technology that can produce high added value products, and a conical spouted bed composed of binary mixtures is a promising reactor for this purpose. Using a statistical method, this research investigated the uniformity of particle concentration along the conical bed, showing that uniform axial composite concentration enables the reactor to be applied in the thermal recycling of waste materials.
SUSTAINABLE ENERGY TECHNOLOGIES AND ASSESSMENTS
(2021)
Article
Engineering, Chemical
Kai Huang, Shuanghe Meng, Tao Zhang, Mao Ye, Wuqiang Yang, Zhongmin Liu
Summary: This study investigated the transition of fluidization behavior from Geldart B particles to A particles induced by temperature change using a developed high-temperature electrical capacitance tomography (ECT) sensor. Silica particles with a Sauter mean diameter of 237 μm and density of 2650 kg/m^3, typically Geldart B particles under ambient conditions, were fluidized in a 5.5 cm column from 20 to 600 degrees C. The ECT measurements showed that with increasing temperature, there was a decrease in minimum bubbling velocity (U(mb)), no bed expansion characteristic in the homogeneous fluidization regime, an absence of multiple-bubbles regime, and a larger bubble size. The pressure drop against superficial gas velocity curves at elevated temperatures confirmed homogeneous fluidization between the minimum fluidization velocity (U(mf)) and U(mb). Our analysis demonstrated that cohesive interparticle forces, which increase linearly with temperature, are responsible for the fluidization behavior transition of the silica particles.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2023)
Article
Engineering, Civil
Anirudh Saboo, Manish Kumar
Summary: This study investigates a base-supported partially-filled fluid-shell system representing the pressure vessel of a fast reactor. The shell, consisting of two cylindrical parts and a conical part, is characterized using Donnell's theory, while the fluid is modeled using a velocity potential approach. The energy functional obtained from compatibility and interface conditions is minimized to determine natural frequencies. Parametric studies show that the vibration frequencies of the fluid-shell system (bulging frequencies) are similar to the shell-only vibration frequencies when only the lowermost part is filled. Vibration frequencies of the free fluid surface (sloshing frequencies) are not significantly affected by fluid height when most of the vessel is filled. The study does not consider the coupling between bulging and sloshing modes, which may need to be considered for a completely-filled vessel with a large base radius.
THIN-WALLED STRUCTURES
(2023)
Article
Physics, Multidisciplinary
Pavel A. Andreev
Summary: This research investigates the physical system of ultracold Bose atoms and proposes a two-fluid model consisting of Bose-Einstein condensate and normal fluid. By solving the evolution equations for pressure and pressure flux, a model describing short-range interaction and quantum fluctuations is obtained.
Article
Engineering, Mechanical
H. Bagheri, Y. Kiani, M. R. Eslami
Summary: This study investigates the geometrically nonlinear dynamic response of a functionally graded material conical-cylindrical-conical joint shell construction exposed to rapid surface heating. The material properties are determined using the Voigt and Touloukian models, and the equations of motion are derived using the first-order shear deformation theory and the von Karman form of nonlinear kinematics. The study finds that the geometrical characteristics and boundary conditions of the shell are important factors influencing the dynamic response of the shell system under rapid surface heating.
JOURNAL OF VIBRATION ENGINEERING & TECHNOLOGIES
(2023)
Article
Engineering, Chemical
Liangliang Fu, Haolong Bai, Dingrong Bai, Guangwen Xu
Summary: This research focuses on understanding the hydrodynamics of gas-solid fluidization at ultra-high temperatures and aims to aid the development of ultra-high temperature fluidized bed reactors. The results demonstrate that stable fluidization at ultra-high temperatures can be achieved by using large and broad size distribution particles and operating at sufficiently high gas velocities. The study also discusses the bed pressure drop fluctuation, minimum fluidization velocity, and pressure drop offset at ultra-high temperatures.
Article
Engineering, Chemical
Dongfang Li, Runxia Cai, Seokgi Ahn, Xiaofeng Lu, Sungmook Jung, Chung-Hwan Jeon, Xing Zhu
Summary: Five field tests were conducted to measure the pressure drops in the transport zone of a 550-MWe CFB boiler in order to investigate its hydrodynamics. The calculated circulating rates Gs were compared with estimations based on elutriation constant and saturation-carrying capacity theories, showing good agreement for the elutriation constant but discrepancies for the saturation-carrying capacity. The effect of riser diameter on Gs was discussed, indicating an independence of the circulating rate beyond a certain dimension.
Article
Engineering, Chemical
Fuweng Zhang, Damiano La Zara, Feilong Sun, Michael J. Quayle, Gunilla Petersson, Staffan Folestad, J. Ruud van Ommen
Summary: The study investigated the fluidization of fine inhalation grade of lactose powders and found that a combination of vibration and micro-jet showed the best performance in improving fluidization. Using any two assisting methods together leads to better fluidization, with micro-jet resulting in considerable powder losses. Overall, the introduction of assistance methods enhanced separation forces and decreased agglomerate size.
CANADIAN JOURNAL OF CHEMICAL ENGINEERING
(2021)
Article
Chemistry, Multidisciplinary
Amirhossein Mahtabani, Damiano La Zara, Rafal Anyszka, Xiaozhen He, Mika Paajanen, J. Ruud van Ommen, Wilma Dierkes, Anke Blume
Summary: The gas-phase modification process improved control over the thickness and uniformity of the deposited layers on nanoparticles, allowing for the introduction of versatile functionalized organic layers on the surface of nanoparticles in a controlled manner.
Article
Nanoscience & Nanotechnology
Dominik Benz, Y-Nhi T. Nguyen, Thanh-Lieu T. Le, Thanh-Hiep T. Le, Viet-Thong Le, J. Ruud van Ommen, Hao Van Bui
Summary: This study introduces a gas-phase approach for synthesizing Cu2O/TiO2 powder-based photocatalysts using atomic layer deposition (ALD) in a fluidized bed reactor. The deposition of ultrasmall Cu2O clusters on P25 TiO2 nanoparticles enhances the photocatalytic activity significantly, attributed to efficient charge transfer and reduced charge recombination. The study provides a fast, scalable, and efficient process for controllably depositing Cu2O clusters for surface engineering.
Article
Environmental Sciences
Pieter van Gelder, Pim Klaassen, Behnam Taebi, Bart Walhout, Ruud van Ommen, Ibo van de Poel, Zoe Robaey, Lotte Asveld, Ruud Balkenende, Frank Hollmann, Erik Jan van Kampen, Nima Khakzad, Robbert Krebbers, Jos de Lange, Wolter Pieters, Karel Terwel, Eelco Visser, Tiny van der Werff, Dick Jung
Summary: This paper provides an overview of the concept and application of Safe-by-Design in various engineering disciplines, discussing differences, commonalities, and empirical data on design strategies. Safe-by-Design is considered a specific elaboration of Responsible Research and Innovation, helping to proactively incorporate safety considerations into engineering practices while avoiding extremes of technological optimism and disproportionate precaution.
INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH
(2021)
Article
Environmental Sciences
Georgios Archimidis Tsalidis, Lya G. Soeteman-Hernandez, Cornelle W. Noorlander, Saeed Saedy, J. Ruud van Ommen, Martina G. Vijver, Gijsbert Korevaar
Summary: Safe-and-sustainable-by-design is a concept that integrates safety, sustainability, and functionality throughout a product's life cycle. This paper proposes a framework for early safety and sustainability assessment based on prospective life cycle assessment. The framework helps identify environmental sustainability and toxicity hotspots to avoid the development of toxic alternatives.
INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH
(2022)
Article
Chemistry, Multidisciplinary
Isabell Bagemihl, Chaitanya Bhatraju, J. Ruud van Ommen, Volkert van Steijn
Summary: This paper demonstrates that structured reactors operated under gas-liquid Taylor flow can overcome the mass transfer limitations in CO2 electrolysis in aqueous systems and significantly improve reactor performance. By developing an easy-to-use analytical model, the relationship between process conditions, mass transfer, and reactor performance is explored. The results show that the film thickness and the volume ratio of CO2/electrolyte fed to the reactor greatly affect the current density and the faradaic efficiency, and industrially relevant performance can be achieved when operating the reactor at an elevated pressure beyond 5 bar.
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2022)
Article
Materials Science, Ceramics
Yujie Zhao, Xiao Wang, Quan-an Li, Xinyu Zhang, Ye Li, Rong-Jun Xie, J. Ruud van Ommen, H. T. Hintzen
Summary: Depositing nano-sized Al2O3 film around each BaSi2O2N2:Eu2+ particle through atomic layer deposition (ALD) can improve its thermal stability and inhibit oxidation. The Al2O3 coated phosphor showed an increased oxidation temperature and reduced degradation under water-steam conditions. White light-emitting diodes (wLEDs) fabricated with the Al2O3 coated phosphor also exhibited a significantly higher luminous flux.
CERAMICS INTERNATIONAL
(2023)
Article
Chemistry, Physical
Asvin Sajeev Kumar, Marilia Pupo, Kostadin V. Petrov, Mahinder Ramdin, J. Ruud van Ommen, Wiebren de Jong, Ruud Kortlever
Summary: This study investigates the electrochemical CO2 reduction performance of copper in non-aqueous electrolytes based on DMF, NMP, and ACN. The results show that DMF and NMP mainly produce oxalate, while ACN mainly produces hydrogen and formate. Therefore, aqueous electrolytes exhibit higher selectivity for hydrocarbon and alcohol production on copper electrodes, while organic electrolytes based on DMF and NMP are more suitable for obtaining oxalate and formate.
JOURNAL OF PHYSICAL CHEMISTRY C
(2023)
Article
Biochemistry & Molecular Biology
Sunkeun Kim, Wilma K. Dierkes, Anke Blume, Auke Talma, J. Ruud Van Ommen, Nicolas Courtois, Julian Davin, Carla Recker, Julia Schoeffel
Summary: This study investigates the compatibility of pre-treated silica with natural rubber and its influence on the processing of silica-silane compounds. The results show that incorporating pre-treated silica fillers can improve the processing and reduce the generation of volatile organic compounds.
Article
Chemistry, Multidisciplinary
Isabell Bagemihl, Lucas Cammann, Mar Perez-Fortes, Volkert van Steijn, J. Ruud van Ommen
Summary: Coupling the analysis of technical feasibility with economic evaluation is crucial in identifying targets for development in electrochemical CO2 conversion processes. Electrochemical conversion of captured CO2 to base chemicals has the potential to contribute to a sustainable energy transition by closing the carbon cycle. While low-temperature electrochemical CO2 conversion has been demonstrated at lab scale, optimizing electrolyzer design and operation for industrial applications based on techno-economic analysis is the current focus. However, existing analyses often overlook the interdependencies between key performance variables, such as current density, Faradaic efficiency, and conversion. Our study highlights the significance of multiscale models in the field of CO2 electrolysis to understand the economic trade-offs and overcome bottlenecks in system designs.
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2023)
Article
Chemistry, Multidisciplinary
Riccardo Uglietti, Daniele Micale, Damiano La Zara, Aristeidis Goulas, Luca Nardi, Mauro Bracconi, J. Ruud van Ommen, Matteo Maestri
Summary: This study demonstrates the potential of combining numerical and experimental approaches in understanding catalytic reactors, particularly fluidized beds. Through experiments and data analysis, the effectiveness of the in-house first-principles multiscale Computational Fluid Dynamic-Discrete Element Method (CFD-DEM) model is validated, and the fundamental insights that can be achieved through detailed numerical methods are reported. The integration of experimental information and numerical simulations allows for optimal design and scale-up procedures for reactor configurations with promising prospects in the energy transition.
REACTION CHEMISTRY & ENGINEERING
(2023)
Article
Chemistry, Physical
Jacob A. Moulijn, J. Ruud van Ommen, Aristeidis Goulas, David Valdesueiro, Jana Juan-Alcaniz, Kar-Ming Au-Yeung, Leo Woning, Jaap A. Bergwerff
Summary: The possibility of using a Ti alkoxide precursor for gas phase deposition to modify catalysts was demonstrated. A Ti oxide layer was successfully deposited on a mesoporous alumina support using titanium tetra-isopropoxide. The uniformity of the TiO2 coating was confirmed at both intra-particle and inter-particle levels. The TiO2 coating showed stability and improved catalytic activity in hydroprocessing compared to pristine alumina.
CATALYSIS SCIENCE & TECHNOLOGY
(2023)
Article
Chemistry, Multidisciplinary
Albert Santoso, Afke Damen, J. Ruud van Ommen, Volkert van Steijn
Summary: We investigated three variations of atomic layer deposition (ALD) for depositing titanium oxide onto the soft polymer polydimethylsiloxane (PDMS). Our findings demonstrate that ALD performed at atmospheric pressure significantly enhances the organic solvent resistance of PDMS by two orders of magnitude, resulting in a unique surface-subsurface coating of PDMS.
CHEMICAL COMMUNICATIONS
(2022)
Article
Chemistry, Physical
Saeed Saedy, Nico Hiemstra, Dominik Benz, Hao Van Bui, Michael Nolan, J. Ruud van Ommen
Summary: The promotional effects of ALD-deposited CuxO clusters on photocatalytic hydrogen production on P25 TiO2 were studied. It was found that the strong interaction between CuxO and TiO2 resulted in the stabilization of CuxO clusters on the surface. The CuxO/TiO2 photocatalysts showed remarkable improvement in hydrogen productivity, which can be attributed to increased charge carrier separation, improved light absorption, and the generation of surface Ti3+.
CATALYSIS SCIENCE & TECHNOLOGY
(2022)
Article
Engineering, Environmental
Dominik Benz, Hao Van Bui, Hubertus T. Hintzen, Michiel T. Kreutzer, J. Ruud Van Ommen
Summary: The photocatalytic mechanism of TiO2 nanoparticles coated with SiO2 by atomic layer deposition was investigated. SiO2 deposition not only improves the photocatalytic degradation of pollutants, but also changes the degradation mechanism. Low SiO2 loadings enhance OH* radicals generation, while high loadings suppress the photocatalytic performance.
CHEMICAL ENGINEERING JOURNAL ADVANCES
(2022)
Article
Engineering, Chemical
Ri Zhang, Shasha Zhang, Mengyan Ding
Summary: A thin liquid film method is proposed to evaluate sand erosion in annular flow. This method considers the direct interaction between the liquid film and gas core, as well as the entrainment and deposition of droplets. The erosion rate is calculated by considering the effects of liquid entrainment and particle velocity decay. The method is fully verified by comparing with experimental data.
Article
Engineering, Chemical
Yu Suo, Xianheng Su, Wenyuan He, Xiaofei Fu, Zhejun Pan
Summary: This research investigates the mechanical properties of sandstone-shale composite through orthogonal experimental method and discrete element simulation. The results show that different lithologies and thickness ratios can affect the strength and fracture mode of the composite rock samples.
Article
Engineering, Chemical
Maurizio Troiano, Andrea El Hassanin, Roberto Solimene, Alessia Teresa Silvestri, Fabrizio Scala, Antonino Squillace, Piero Salatino
Summary: This study investigates the potential of Fluidized Bed Finishing (FBF) for square flat AlSi10Mg specimens manufactured via Laser-Powder Bed Fusion (L-PBF) additive manufacturing technology. The results show that good finishing can be achieved using rotation-assisted tests, with a maximum reduction of surface roughness by 67%. Steel particles are found to be the most effective bed material.
Review
Engineering, Chemical
Ningbo Song, Wanzhong Yin, Jin Yao
Summary: Seawater's dissolved salts and minerals have various effects on the flotation process, including influencing the characteristics and behavior of flotation factors, as well as affecting the surface of sulfide minerals. In most cases, seawater has adverse effects on the flotation of sulfide minerals, but these effects can be mitigated by adjusting the reagents.
Article
Engineering, Chemical
Kaiqiao Wu, Shuxian Jiang, Victor Francia, Marc-Olivier Coppens
Summary: In rectangular and cylindrical annular fluidized beds, pulsating gas flow can create regular bubble patterns, overcoming challenges seen in conventional units. This study provides new opportunities for modularization of fluidized bed operations.
Article
Engineering, Chemical
Shuo Li, Huili Zhang, Jan Baeyens, Miao Yang, Zehao Li, Yimin Deng
Summary: The paper assesses the behavior of cohesive Geldart C-type particles when fluidized by air with the aid of vibration. It determines that mechanical vibration is a simple and effective method to improve the fluidity of cohesive particles during fluidization.
Article
Engineering, Chemical
Zhenfei Feng, Qingyuan Zhang, Shanpan Liang, Zhenzhou Li, Fangwen Guo, Jinxin Zhang, Ding Yuan
Summary: A new micro/mini-channel heat sink (MCHS) with a combined structure of longitudinal and transverse vortex generators is designed, using Al2O3 nanofluid as the working medium. The study explores the effects of transverse vortex generator shape and longitudinal vortex generator angle on the hydraulic and thermal characteristics, comprehensive performance, entropy generation, and exergy efficiency. The results show that the triangular transverse vortex generator improves the comprehensive performance and exergy efficiency. Combined with the longitudinal vortex generator, the MCHS achieves the best comprehensive performance, entropy generation, and exergy efficiency when the Reynolds number is 742.
Article
Engineering, Chemical
Kostas Giannis, Christoph Thon, Guoqing Yang, Arno Kwade, Carsten Schilde
Summary: This study presents a 3D convolutional neural network (3D-CNN) methodology for generating realistic 3D models of particles. The method trains on 2D projections of particle images to predict their 3D shapes, and evaluates the accuracy of the predictions using Fourier shape descriptors (FSDs). This methodology has wide applications in particle shape analysis.
Article
Engineering, Chemical
Zheng-qing Zhou, Lu-jia Chai, Yu-long Zhang, Ya-bin Wang, Ze-chen Du, Tian-yi Wang, Yu-zhe Liu
Summary: The dynamic oxidation and shell-breaking processes of aluminum nanoparticles (ANPs) during heating were studied using in situ transmission electron microscopy. The results revealed that the changes in shell thickness can be divided into three stages, and the active aluminum content of ANP decreased before shell-breaking.
Article
Engineering, Chemical
Fulei Chen, Huaqing Ma, Zihan Liu, Lianyong Zhou, Yongzhi Zhao
Summary: A particle breakage model based on the particle replacement scheme, using the polyhedral model to describe particles, is proposed in this work to accurately describe the breakage of a large number of particles. Additionally, a fast-cutting algorithm is proposed to reproduce the size distribution of progeny particles determined by the breakage model. The validation and simulation results show satisfactory accuracy, efficiency, and stability of the algorithm.
Review
Engineering, Chemical
Matteo Errigo, Christopher Windows-Yule, Massimiliano Materazzi, Dominik Werner, Paola Lettieri
Summary: Gas-solid fluidized-bed systems have advantages in terms of chemical reaction efficiency and temperature control, making them widely used in industrial applications. However, the design, scale-up, and optimization of these complex units are limited by the lack of deep physical understanding. Non-invasive and non-intrusive diagnostic techniques provide a way for researchers to study these systems without affecting the flow field or directly contacting the medium under study.
Article
Engineering, Chemical
Saeed Fateh, Mohammad Behshad Shafii, Mohammad Najafi, Cyrus Aghanajafi
Summary: Applying a magnetic field to ferrofluids alters their flow characteristics and enhances heat transfer. Through visualization and quantitative investigation, it is found that the magnetic field influences the flow patterns and velocity profiles, improving fluid mixing and vorticity magnitude.
Article
Engineering, Chemical
Lei Gao, Bingbing Wei, Xiaochuan Hu, Zaifeng Yao, Yiwen Fang, Xuejian Gao
Summary: In this study, a numerical model of sand triaxial test was established using discrete element software PFC3D, and an indoor triaxial test was conducted to calibrate the numerical model. The influence of microscopic parameters on the macroscopic mechanical response of sand was analyzed. The results showed that the friction coefficient had the greatest impact on the peak strength and residual strength of the sand's stress-strain curve, and it was positively correlated. The normal tangential stiffness ratio was negatively correlated, while the porosity and boundary flexibility stiffness had minimal influence on it.
Article
Engineering, Chemical
Xuan Liu, Jie Gong, Kai Jiang, Xiaojuan Lai, Yu Tian, Kang Zhang
Summary: This study aimed to improve the performance of lignite coal water slurries (CWSs) by synthesizing a series of three-arm amphiphilic block copolymers. By controlling the relative molecular weight, hydrophilic/hydrophobic ratio, and ionic group content, the apparent viscosity of CWSs was significantly reduced and the static stability was improved. Thermogravimetric testing and XPS analysis were conducted to reveal the mechanism behind the improved performance.
Article
Engineering, Chemical
Lanka Dinushke Weerasiri, Daniel Fabijanic, Subrat Das
Summary: Fluidization at low pressure offers significant benefits for the fine chemical industry. This study investigates the behavior of bubbles and bed expansion under low pressure conditions. It is found that lower pressure leads to larger bubbles, increased bubble quantity, and higher aspect ratio. The predictability is affected by the inhomogeneous fluidization, but low pressure fluidization can generate similar bubble sizes with lower fluidizing mass compared to atmospheric pressure.
