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Chemical engineering role in the use of renewable energy .

Feb 06, 2019 · There is a demand for new chemical reaction technologies and associated engineering aspects due to on-going transition in energy and chemistry associated to moving out progressively from the use of fossil fuels. Focus is given in this review on two main aspects: i) the development of alternative carbon sources and ii) the integration of renewable energy in the chemical production.

Simulation of Olive Kernel Gasification in a Bubbling .

Simulation of Olive Kernel Gasification in a Bubbling Fluidized Bed Pilot Scale Reactor . Stavros Michailos, Anastasia Zabaniotou * Department of Chemical Engineering, Aristotle University of Thessaloniki, Thessaloniki, Greece . Email: * [email protected] . Received May 6, 2012; revised June 22, 2012; accepted July 4, 2012. ABSTRACT

Catalytic fast pyrolysis of wood and alcohol mixtures in a .

Catalytic fast pyrolysis (CFP) of pine wood, alcohols (methanol, 1-propanol, 1-butanol and 2-butanol) and their mixtures with ZSM-5 catalyst were conducted in a bubbling fluidized bed reactor. The effects of temperature and weight hourly space velocity (WHSV) on the product carbon yields and selectivities of CFP of pure pine wood and methanol were investigated.

Coupling DAEM and CFD for simulating biomass fast .

@article{osti_1238742, title = {Coupling DAEM and CFD for simulating biomass fast pyrolysis in fluidized beds}, author = {Xiong, Qingang and Zhang, Jingchao and Wiggins, Gavin and Daw, C. Stuart and Xu, Fei}, abstractNote = {We report results from computational simulations of an experimental, lab-scale bubbling bed biomass pyrolysis reactor that include a distributed activation energy model .

Catalytic fast pyrolysis of wood and alcohol mixtures in a .

Catalytic fast pyrolysis (CFP) of pine wood, alcohols (methanol, 1-propanol, 1-butanol and 2-butanol) and their mixtures with ZSM-5 catalyst were conducted in a bubbling fluidized bed reactor. The effects of temperature and weight hourly space velocity (WHSV) on the product carbon yields and selectivities of CFP of pure pine wood and methanol were investigated.

BUBBLING FLUIDIZED BED REACTOR - Chemical Engineering World

Jun 09, 2019 · The bubbling fluidized bed is doubtless the foremost standard reactor for quick shift. the most disadvantage with fluidized-bed reactors is that they require fairly little particles (2–3 mm) to reduce heat/mass transfer effects: this leads to costly needs for grinding lignocellulosic biomass.

Thermolysis of plastic waste in bench- scale fluidized-bed .

2.2.4 Thermo-chemical recycling 8 2.2.5 Land filling 9 2.3 Waste hierarchy 10 2.3.1 Waste hierarchy of plastics 10 3 Thermolysis of Plastics 11 3.1 Polymers 12 3.2 Thermolysis reactors 13 3.2.1 Fluidized-bed reactor (FBR) 13 3.2.2 Batch reactors 15 3.2.3 Fixed-bed reactors 15 3.2.4 Screw kiln reactor 16 3.3 Product yield 17

Bio-Oil Production from Fast Pyrolysis of Cotton Stalk in .

Fast pyrolysis was used to convert waste biomass into bio-oil, which has a benefit of storage and transportation with the potential as a fossil oil substitute. Pakistani cotton stalk was pyrolyzed in a bench-scale bubbling fluidized bed reactor.

Chemical Engineering and Reactor Design of a Fluidised Bed .

reactor (TGFBR) was designed. Using this novel fluidised bed, gravimetric measurements and high heating rate, the thermal conversion of biomass was investigated. Using a thermogravimetric analyser (TGA) as a fixed bed and the TGFBR as a fluidized bed, the pyrolysis kinetics of olive kernels was studied. The pyrolysis in the TGFBR was analysed

Fast Pyrolysis of Biomass in a Circulating Fluidised Bed

The yield of bio-oil, gas and char is measured in a lab scale batch reactor and in a pilot CFB (Centre for Renewable Energy Sources, CRES), illustrated in Fig. 2. The riser has an I.D. of 80 mm and is 3,8 m high. The bottom bubbling fluidized bed burns the separated char. The char combustion gas is used as fluidization gas in the riser.

Chemical Recycling of Polymer Materials - Sasse - 1998 .

The pyrolysis of acrylic polymers provides a good example for comparing a fluidized‐bed reactor and a tubular reactor on the basis of reactor modelling evaluations. The used tubular reactor with internal mass transport is a simplified model for a rotary kiln. Relevant parameters for reactor design and scale‐up are presented.

Development of a Spouted Bed Reactor for Chemical Looping .

Reported carbon conversion efficiencies for fluidized bed fuel reactors range from 26% to 89%, depending on the reactor configuration and size as well as oxygen carrier used [7–9].In Ref. [], the authors demonstrated a 1 megawatt (thermal) pilot plant using ilmenite as oxygen carrier and attained 40% carbon conversion in the fuel reactor of a dual fluidized bed system.

Analysis of Wood Biomass in Bubbling Fluidized Bed Reactors

The bubbling fluidized bed reactor was used in the simulation, in which the advantages of a good mixture is presented, one which provides high rates of mass and heat transfer. The gas-solid flow that occurs in this reactor was described through mass, energy, momentum, and chemical species balances.

Numerical Modelling of a Fast Pyrolysis Process in a .

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Simulation of Olive Kernel Gasification in a Bubbling .

The main aim of this study is to develop a comprehensive process model for biomass gasification in a pilot scale bubbling fluidized bed gasifier using the ASPEN PLUS simulator. A drawback in using ASPEN PLUS is the lack of a library model to simulate fluidized bed unit operation. However, it is possible for users to input their own models, using FORTRAN codes nested within the ASPEN PLUS .

bed reactor

Ebullated bed reactor - Wikipedia. Ebullated bed reactors are a type of fluidized bed reactor that utilizes ebullition, or bubbling, to achieve appropriate distribution of reactants and catalysts.The ebullated-bed technology utilizes a three-phase reactor (liquid, vapor, and catalyst), and is most applicable for exothermic reactions and for feedstocks which are difficult to process in fixed .

Process simulation and sensitivity analysis of waste .

Figure 1: Aspen plus flowsheet of the fluidized bed gasification process. 2.4 PE pyrolysis A yield based Aspen Plus reactor, RYIELD, was used to simulate the decomposition of the dried polyethylene sample. The complex pyrolysis of PE is modeled as a chemical reaction .

CHAPTER-5 PYROLYSIS REACTOR - Shodhganga

the fluidized bed. The fluid flows upward through the bed, causing the solid particles to be suspended. If the inlet fluid is disabled the bed may settle or pack onto the plate. In a fluidized bed a characteristic set of basic properties can be utilized, indispensable to modern process and chemical engineering, these properties include:

MULTI-SCALE MODELING OF BIOMASS GASIFICATION IN BUBBLING .

Incorporation of chemical kinetics mechanisms for modeling primary and secondary pyrolysis as well as gas phase chemistry during the gasification of biomass particles in a bubbling fluidized bed.

Pyrolysis Reactor - an overview | ScienceDirect Topics

This gas is necessarily inert without oxygen. The main product of this type is char owing to the relatively slow heating rate and the long residence time of the product in the pyrolysis zone. 3.6.2 Bubbling-Bed Pyrolyzer. Figure 3.9(a) shows a bubbling fluidized-bed pyrolyzer. Crushed biomass (2–6 mm) is fed into a bubbling bed of hot sand.

bed reactor

Ebullated bed reactor - Wikipedia. Ebullated bed reactors are a type of fluidized bed reactor that utilizes ebullition, or bubbling, to achieve appropriate distribution of reactants and catalysts.The ebullated-bed technology utilizes a three-phase reactor (liquid, vapor, and catalyst), and is most applicable for exothermic reactions and for feedstocks which are difficult to process in fixed .

Fluidized bed reactor - Open Source Ecology

Fluidized bed reactors (FBR) are chambers that allow the mixing of liquid or gas substrates with powdered catalysts such that the catalyst acts like a fluid, maximizing mixing and interaction. The basic configuration is detailed to the right where a substrate is passed upward into the chamber under pressure through a plate that supports the .

Development of a Spouted Bed Reactor for Chemical Looping .

Reported carbon conversion efficiencies for fluidized bed fuel reactors range from 26% to 89%, depending on the reactor configuration and size as well as oxygen carrier used [7–9].In Ref. [], the authors demonstrated a 1 megawatt (thermal) pilot plant using ilmenite as oxygen carrier and attained 40% carbon conversion in the fuel reactor of a dual fluidized bed system.

Operating Parameters for the Circulating Fluidized Bed CFB .

Proceedings of European Congress of Chemical Engineering (ECCE-6) Copenhagen, 16-20 September 2007 Operating Parameters for the Circulating Fluidized Bed (CFB) Pyrolysis of Biomass M. Van de Velden a†, J. Baeyens a and I. Boukis b a University of Birmingham, Department of Chemical Engineering, B15 2TT Birmingham,

Fluidized Bubbling Bed Reactor Model For Silane Pyrolysis .

Fluidized Bubbling Bed Reactor Model For Silane Pyrolysis In Solar Grade Silicon Production Yue Huang1, Palghat . A. Ramachandran1, Milorad. P. Dudukovic1, Milind S. Kulkarni2 1 Chemical Reaction Engineering Laboratory (CREL), Department of Energy, Environmental Chemical Engineering, Campus Box 1198, Washington

University of Groningen Particle Transport in Fluidized .

At this point, a bubbling fluidized bed occurs as shown in Figure 2.1C. As the velocity is increased further still, the bubbles in a bubbling fluidized bed will coalesce and grow as they rise. If the ratio of the height to the diameter of the bed is high enough, the size of bubbles may become almost the same as diameter of the bed.

Introduction to Fluidization - The Global Home of Chemical .

Nov 21, 2014 · a fluidized-bed regenerator. Fluidized beds typically are more complex to design, build, and operate than other types of reactors, such as packed-bed and stirred-tank reactors. Scaleup of fluidized beds can be difficult (1). Fluidized beds are prone to erosion and particle attrition caused by the moving particles. Solids

Fluidized Bed Pyrolysis of two Plastic Wastes

6). The experiments were carried out in a laboratory scale bubbling fluidized bed reactor, made of high temperature austenitic stainless steel, having an internal diameter of 55mm and a total height of 0.7m. A sampling line was specifically designed and installed to collect pyrolysis gas and to recovery the heavy hydrocarbons fraction.

Publications - CBE - Western University - Western Engineering

Dongbing Li, Franco Berruti and Cedric Briens, "Oxidative Pyrolysis of Kraft Lignin in a Bubbling Fluidized Bed Reactor with Air", Biomass and Bioenergy, 76, 96-107 (2015). Mohammad Latifi, Franco Berruti and Cedric Briens, "Thermal and Catalytic Gasification of Bio-Oils in the Jiggle Bed Reactor for Syngas Production" International .

A KINETIC MODEL FOR THE PRODUCTION OF LIQUIDS FROM THE .

The model provides a very good agreement with the experimental results obtained using a pilot plant fluidized bed pyrolysis reactor The proposed model is shown to be able to predict the organic liquid yield as a function of the operating parameters of the process, within the optimal conditions for maximizing the tar yields, and the reaction .