Chemical and Process Engineering

Items from 1 to 20 out of 26 results

article

CFD Numerical Simulation of Biodiesel Synthesis in a Spinning Disc Reactor

Zhuqing Wen, Jerzy Petera

Chemical and Process Engineering > 2015 > 36 > 1 > 21-37

In this paper a two-disc spinning disc reactor for intensified biodiesel synthesis is described and numerically simulated. The reactor consists of two flat discs, located coaxially and parallel to each other with a gap of 0.2 mm between the discs. The upper disc is located on a rotating shaft while the lower disc is stationary. The feed liquids, triglycerides (TG) and methanol are introduced coaxially...

article

Analysis of the Transition Time From Air to Oxy-Combustion

Janusz Lasek, Radosław Lajnert, Krzysztof Głód, Jarosław Zuwała

Chemical and Process Engineering > 2015 > 36 > 1 > 113-120

In this paper some issues of the transition process from air- to oxy-combustion were investigated. Advantages of flexible combustion were described. Flexible combustion tests carried out at four European plants and five plants outside Europe of different scales of process and test parameters were presented. An analysis of the transition time from air to oxy-combustion of different laboratory and pilot...

article

Study of the Process of Hydraulic Mixing in Anaerobic Digester of Biogas Plant

Julia V. Karaeva, Galia R. Khalitova, Dmitry A. Kovalev, Irene A. Trakhunova

Chemical and Process Engineering > 2015 > 36 > 1 > 101-112

Two systems of hydraulic mixing in a vertical cylindrical anaerobic digester: standard and modernised are discussed in the paper. Numerical investigations that were carried out are focused on a study of hydrodynamic processes in an aerobic digester using two various systems of hydraulic mixing as well as on analysis of the efficiency of methane fermentation process accomplished under different geometric...

article

A Mechanistic Model of a Passive Autocatalytic Hydrogen Recombiner

Antoni Rożeń

Chemical and Process Engineering > 2015 > 36 > 1 > 3-19

: A passive autocatalytic hydrogen recombiner (PAR) is a self-starting device, without operator action or external power input, installed in nuclear power plants to remove hydrogen from the containment building of a nuclear reactor. A new mechanistic model of PAR has been presented and validated by experimental data and results of Computational Fluid Dynamics (CFD) simulations. The model allows to...

article

Computational Fluid Dynamics and Experimental Studies of a New Mixing Element in a Static Mixer as a Heat Exchanger

Maciej Konopacki, Marian Kordas, Karol Fijałkowski, Rafał Rakoczy

Chemical and Process Engineering > 2015 > 36 > 1 > 59-72

The main aim of this work is to study the thermal efficiency of a new type of a static mixer and to analyse the flow and temperature patterns and heat transfer efficiency. The measurements were carried out for the static mixer equipped with a new mixing insert. The heat transfer enhancement was determined by measuring the temperature profiles on each side of the heating pipe as well as the temperature...

article

Towards a Numerical Model of Bacterial Filtration in Fibrous Filters

Jakub M. Gac, Leon Gradoń

Chemical and Process Engineering > 2015 > 36 > 1 > 89-99

A model of bacterial filtration on fibrous filter media is developed. The single fibre efficiency as well as the efficiency of the whole filter - at the onset of the process and the evolution of those quantities - are analysed. The differences between the numerical modelling of colloidal particles and bacteria are stressed in detail. The main differences are the active motion ability of bacteria and...

article

A Selection of Amine Sorbents for CO₂ Capture from Flue Gases

Andrzej Wilk, Lucyna Więcław-Solny, Dariusz Śpiewak, Tomasz Spietz, more

Chemical and Process Engineering > 2015 > 36 > 1 > 49-57

Amine absorption processes are widely used in the industry to purify refinery gases, process gases or natural gas. Recently, amine absorption has also been considered for CO₂ removal from flue gases. It has a number of advantages, but there is one major disadvantage - high energy consumption. This can be reduced by using an appropriate sorbent. From a group of several dozen solutions, three amine...

article

A Modified Gibbs Free Energy Minimisation Model for Fluid Bed Coal Gasification

Marek Ściążko, Leszek Stępień

Chemical and Process Engineering > 2015 > 36 > 1 > 73-87

A modified approach to equilibrium modelling of coal gasification is presented, based on global thermodynamic analysis of both homogeneous and heterogeneous reactions occurring during a gasification process conducted in a circulating fluid bed reactor. The model is based on large-scale experiments (ca. 200 kg/h) with air used as a gasification agent and introduces empirical modifications governing...

article

PDU-Scale Experimental Results of CO₂ Removal With Amp/Pz Solvent

Dariusz Śpiewak, Aleksander Krótki, Tomasz Spietz, Marcin Stec, more

Chemical and Process Engineering > 2015 > 36 > 1 > 39-48

:This paper provides a discussion concerning results of CO₂removal from a gas mixture by the application of aqueous solutions of ethanoloamine (MEA) and 2-amino-2-methyl-1-propanol (AMP) promoted with piperazine (PZ). The studies were conducted using a process development unit. Research of such a scale provides far more reliable representation of the actual industrial process than modelling and laboratory...

article

Briquetting of EAF Dust for its Utilisation in Metallurgical Processes

Aneta Magdziarz, Monika Kuźnia, Michał Bembenek, Paweł Gara, more

Chemical and Process Engineering > 2015 > 36 > 2 > 263-271

Dust generated at an electric arc furnace during steel production industry is still not a solved problem. Electric arc furnace dust (EAF) is a hazardous solid waste. Sintering of well-prepared briquetted mixtures in a shaft furnace is one of possible methods of EAFD utilisation. Simultaneously some metal oxides from exhaust gases can be separated. In this way, various metals are obtained, particularly...

article

Test Reactions to Study Efficiency of

Magdalena Jasińska

Chemical and Process Engineering > 2015 > 36 > 2 > 171-208

Effects of mixing on the course of fast chemical reactions are relatively well understood, especially in homogeneous systems. This enables to design and operate chemical reactors with the goal to achieve a high yield of a desired product and use systems of complex reactions as a chemical probe (chemical test reactions) to identify progress of mixing and quality of mixture. Recently, a number of studies...

article

Numerical Studies on Controlling Gaseous Fuel Combustion by Managing the Combustion Process of Diesel Pilot Dose in a Dual-Fuel Engine

Maciej Mikulski, Sławomir Wierzbicki, Andrzej Piętak

Chemical and Process Engineering > 2015 > 36 > 2 > 225-238

Protection of the environment and counteracting global warming require finding alternative sources of energy. One of the methods of generating energy from environmentally friendly sources is increasing the share of gaseous fuels in the total energy balance. The use of these fuels in compression-ignition (CI) engines is difficult due to their relatively high autoignition temperature. One solution for...

article

Thermogravimetric and Kinetic Analysis of Raw and Torrefied Biomass Combustion

Marcin Kopczyński, Agnieszka Plis, Jarosław Zuwała

Chemical and Process Engineering > 2015 > 36 > 2 > 209-223

The use of torrefied biomass as a substitute for untreated biomass may decrease some technological barriers that exist in biomass co-firing technologies e.g. low grindability, high moisture content, low energy density and hydrophilic nature of raw biomass. In this study the TG-MS-FTIR analysis and kinetic analysis of willow (Salix viminalis L.) and samples torrefied at 200, 220, 240, 260, 280 and...

article

Local Turbulent Energy Dissipation Rate in a Vessel Agitated by a Rushton Turbine

Radek Šulc, Vít Pešava, Pavel Ditl

Chemical and Process Engineering > 2015 > 36 > 2 > 135-149

The scaling of turbulence characteristics such as turbulent fluctuation velocity, turbulent kinetic energy and turbulent energy dissipation rate was investigated in a mechanically agitated vessel 300 mm in inner diameter stirred by a Rushton turbine at high Reynolds numbers in the range 50 000 < Re < 100 000. The hydrodynamics and flow field was measured using 2-D TR PIV. The convective velocity...

article

Comparison of Large Eddy Simulations and κ-ε Modelling of Fluid Velocity and Tracer Concentration in Impinging Jet Mixers

Krzysztof Wojtas, Wojciech Orciuch, Łukasz Makowski

Chemical and Process Engineering > 2015 > 36 > 2 > 251-262

Simulations of turbulent mixing in two types of jet mixers were carried out using two CFD models, large eddy simulation and κ-ε model. Modelling approaches were compared with experimental data obtained by the application of particle image velocimetry and planar laser-induced fluorescence methods. Measured local microstructures of fluid velocity and inert tracer concentration can be used for direct...

article

Influence of Steam Reforming Catalyst Geometry on the Performance of Tubular Reformer – Simulation Calculations

Ewelina Franczyk, Andrzej Gołębiowski, Tadeusz Borowiecki, Paweł Kowalik, more

Chemical and Process Engineering > 2015 > 36 > 2 > 239-250

A proper selection of steam reforming catalyst geometry has a direct effect on the efficiency and economy of hydrogen production from natural gas and is a very important technological and engineering issue in terms of process optimisation. This paper determines the influence of widely used seven-hole grain diameter (ranging from 11 to 21 mm), h/d (height/diameter) ratio of catalyst grain and S_h/S...

article

Mathematical Kinetic Modelling and Representing Design Equation for a Packed Photoreactor with Immobilised TiO₂-P25 Nanoparticles on Glass Beads in the Removal of C.I. Acid Orange 7

Behnaz Sheidaei, Mohammad A. Behnajady

Chemical and Process Engineering > 2015 > 36 > 2 > 125-133

In this work, a design equation was presented for a batch-recirculated photoreactor composed of a packed bed reactor (PBR) with immobilised TiO₂-P25 nanoparticle thin films on glass beads, and a continuous-flow stirred tank (CFST). The photoreactor was studied in order to remove C.I. Acid Orange 7 (AO7), a monoazo anionic dye from textile industry, by means of UV/TiO₂ process. The effect of different...

article

A Mathematical Model of Membrane Gas Separation with Energy Transfer by Molecules of Gas Flowing in a Channel to Molecules Penetrating this Channel from the Adjacent Channel

Maciej Szwast, Zbigniew Szwast

Chemical and Process Engineering > 2015 > 36 > 2 > 151-169

The paper presents the mathematical modelling of selected isothermal separation processes of gaseous mixtures, taking place in plants using membranes, in particular nonporous polymer membranes. The modelling concerns membrane modules consisting of two channels - the feeding and the permeate channels. Different shapes of the channels cross-section were taken into account. Consideration was given to...

article

Intensification of heat transfer between heat exchange surfaces at low RE values

Jozef Cernecky, Zuzana Brodnianska, Jan Koniar

Chemical and Process Engineering > 2015 > 36 > 3 > 331-344

This contribution deals with the heat transfer parameters and pressure losses in heat exchange sets with six geometrical arrangements at low Re values (Re from 476 to 2926). Geometrical arrangements were characterised by the h/H ratio ranging from 0.2 to 1.0. The experiments used the holographic interferometry method in real time. This method enables visible and quantitative evaluations of images...

article

Sampling related issues in pod-based model reduction of simplified circulating fluidised bed combustor model

Katarzyna Bizon

Chemical and Process Engineering > 2015 > 36 > 3 > 365-376

Over the last decades the method of proper orthogonal decomposition (POD) has been successfully employed for reduced order modelling (ROM) in many applications, including distributed parameter models of chemical reactors. Nevertheless, there are still a number of issues that need further investigation. Among them, the policy of the collection of representative ensemble of experimental or simulation...

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36
Year:
2015

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Keywords

MIXING (4)
AMP (2)
CFD (2)
COMBUSTION (2)
MEA (2)
PIV (2)
PROCESS INTENSIFICATION (2)
ADSORPTION (1)
BACTERIAL FILTRATION (1)
BATCH-RECIRCULATED PHOTOREACTOR (1)
BIODIESEL SYNTHESIS (1)
BIOFILM FORMATION (1)
BIOGAS (1)
BRIQUETTING (1)
C.I. ACID ORANGE 7 (1)
CATALYSIS (1)
CATALYST COKING (1)
CCS (1)
CFD MODELLING (1)
CHANGES OF THE PRESSURE OF GAS ALONG THE LENGTH OF FLOW CHANNEL (1)
CHEMICAL TEST REACTIONS (1)
CIRCULATING FLUIDISED BED (1)
CO2 CAPTURE (1)
COAL GASIFICATION (1)
COLBURN J-FACTOR (1)
COMBUSTION PROCESS (1)
COMPRESSION (1)
DEGREE OF REHYDRATION (1)
DESIGN EQUATION (1)
DESIGN PROCEDURE (1)
DEVOLATILISATION (1)
DRYING KINETICS (1)
DUAL-FUEL ENGINE (1)
DYNAMIC TRANSITION (1)
EFFICIENCY OF MIXING (1)
ELECTRIC ARC FURNACE DUST (1)
ENERGY SPECTRUM FUNCTION (1)
ENGULFMENT MODEL (1)
EQUILIBRIUM MODELLING (1)
FILTRATION EFFICIENCY (1)
FLUCTUATION VELOCITY (1)
FLUID BED GASIFICATION (1)
FORCED CONVECTION (1)
FURNACE CFD MODELLING (1)
GASEOUS FUEL (1)
GASIFICATION MODELLING (1)
HEAT EXCHANGE SURFACE (1)
HEAT TRANSFER (1)
HEAT TRANSFER PROCESS (1)
HETEROGENEOUS PHOTOCATALYSIS (1)
HYBRID ECOLOGICAL REFRIGERATION CYCLE (1)
HYDRODYNAMICS (1)
HYDROGEN (1)
IEM MODEL (1)
INTERFEROMETRY (1)
INTERNAL GAS PRESSURE (1)
JET MIXERS (1)
KINETIC MODEL (F1F1) (1)
LAMINAR FLOW (1)
LES (1)
LIQUID ATOMISATION (1)
LIQUID TO AIR ATOMISERS (1)
LOCAL TURBULENT ENERGY DISSIPATION RATE (1)
MASS AND ENERGY BALANCE (1)
MATHEMATICAL KINETIC MODELLING (1)
MATHEMATICAL MODEL (1)
MEMBRANE (1)
MEMBRANE MODULE (1)
MICROMIXING (1)
MODEL REDUCTION (1)
NATURAL CONVECTION (1)
NICKEL CATALYST GEOMETRY (1)
NONSTATIONARY FILTRATION (1)
NUMERICAL SIMULATION (1)
OPTIMAL SAMPLING (1)
OSMOTIC DEHYDRATION (1)
OXY-FUEL (1)
PF SWIRL BURNER (1)
PLIF (1)
PROCESS FLOW MODELLING (1)
PROCESS SIMULATION (1)
PRODUCT QUALITY (1)
PROPER ORTHOGONAL DECOMPOSITION (1)
PYROLYSIS (1)
PZ (1)
RECIPROCAL TRANSFER OF ENERGY BETWEEN GAS MOLECULES (1)
RECYCLING (1)
RUSHTON TURBINE (1)
SPINNING DISC (1)
STATIC MIXER (1)
TG CONVERSION (1)
TG-MS-FTIR INVESTIGATION (1)
TIO2-P25 NANOPARTICLES (1)
TORREFACTION (1)
TORREFIED BIOMASS (1)
TUBULAR STEAM REFORMING (1)
VAPORISATION (1)
WHIRLPOOL (1)
ZINC OXIDE (1)
more

INFONA - science communication portal

Chemical and Process Engineering

CFD Numerical Simulation of Biodiesel Synthesis in a Spinning Disc Reactor

Analysis of the Transition Time From Air to Oxy-Combustion

Study of the Process of Hydraulic Mixing in Anaerobic Digester of Biogas Plant

A Mechanistic Model of a Passive Autocatalytic Hydrogen Recombiner

Computational Fluid Dynamics and Experimental Studies of a New Mixing Element in a Static Mixer as a Heat Exchanger

Towards a Numerical Model of Bacterial Filtration in Fibrous Filters

A Selection of Amine Sorbents for CO₂ Capture from Flue Gases

A Modified Gibbs Free Energy Minimisation Model for Fluid Bed Coal Gasification

PDU-Scale Experimental Results of CO₂ Removal With Amp/Pz Solvent

Briquetting of EAF Dust for its Utilisation in Metallurgical Processes

Test Reactions to Study Efficiency of

Numerical Studies on Controlling Gaseous Fuel Combustion by Managing the Combustion Process of Diesel Pilot Dose in a Dual-Fuel Engine

Thermogravimetric and Kinetic Analysis of Raw and Torrefied Biomass Combustion

Local Turbulent Energy Dissipation Rate in a Vessel Agitated by a Rushton Turbine

Comparison of Large Eddy Simulations and κ-ε Modelling of Fluid Velocity and Tracer Concentration in Impinging Jet Mixers

Influence of Steam Reforming Catalyst Geometry on the Performance of Tubular Reformer – Simulation Calculations

Mathematical Kinetic Modelling and Representing Design Equation for a Packed Photoreactor with Immobilised TiO₂-P25 Nanoparticles on Glass Beads in the Removal of C.I. Acid Orange 7

A Mathematical Model of Membrane Gas Separation with Energy Transfer by Molecules of Gas Flowing in a Channel to Molecules Penetrating this Channel from the Adjacent Channel

Intensification of heat transfer between heat exchange surfaces at low RE values

Sampling related issues in pod-based model reduction of simplified circulating fluidised bed combustor model

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