Coal gasification in a jet‐spouted bed

Tsuji, Teruo; Uemaki, Osamu

doi:10.1002/cjce.5450720316

Cited by 21 publications

(5 citation statements)

References 5 publications

(8 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Pyrolysis of biomass [42][43][44][45][46][47], waste plastic [48,49], scrap tires [50,51] and sludge [52][53][54][55] have been tested and validated at lab and pilot scale. Also, the combustion of wood charcoal [56], biomass [57][58][59], sludge from the paper industry [60] or eventually toxic wastes [61] has been object of several studies as well as the gasification of coal [62,63], biomass [64][65][66][67], sewage sludge [68], flame retardants textile products [69] and mixtures of biomass with plastics [46] or coal [70].…”

mentioning

confidence: 99%

Modelling of Spouted and Spout-Fluid Beds: Key for Their Successful Scale Up

et al. 2017

View full text Add to dashboard Cite

The development of robust mathematical models could provide the necessary tools for a more rapid, efficient, and reliable spouted bed technology development. Computer simulations can be very useful to aid this design and scale-up process: firstly, they can contribute to obtain a fundamental insight into their complex dynamic behavior by understanding the elementary physical principles such as drag, friction, dissipation etc.; secondly, the simulations can be used as a design tool where the ultimate goal is to have a numerical model with predictive capabilities for gas-particle flows at engineering scale. Clearly, one single simulation method will not be able to achieve this goal, but a hierarchy of methods modelling phenomena on different length and time scales can achieve this. The most fruitful approach will be when they are simultaneously followed, so that they can mutually benefit from each other. In this sense, this paper presents a review of the current state of the art of modelling on spouted and spout-fluid beds through an analysis of recent literature following a multiscale approach (molecular and particle, lab, plant and industrial scale). The main features of the different scales together with their current limits are discussed and specific topics are highlighted as paths that still need to be explored. In summary, the paper aims to define the theoretical setline and the basis of improvement that would lead to a robust multiscale model with solid links between micro and macroscopic phenomena. If done with the correct balance between accuracy and computational costs it will gear SB towards their reliable and successful implementation.

show abstract

mentioning

confidence: 99%

Modelling of Spouted and Spout-Fluid Beds: Key for Their Successful Scale Up

et al. 2017

View full text Add to dashboard Cite

show abstract

“…Nowadays spouted beds are widely used in various physical operations such as drying, coating and granulation. They are used as chemical reactors in many applications such as coal gasification, catalytic partial oxidation, catalytic oxidative coupling reactors, catalytic polymerization and pyrolysis (Tsuji and Uemaki 1994, Wei et al 2003, Mleczko and Marschall 1997, Olazar 1994, Aguado et al 2002. Comprehensive experimental study has been done by He et al and Olazar et al for hydrodynamics of conventional spouted beds (He et al 1994a, He et al 1994b, Olazar et al 2001.…”

Section: Introductionmentioning

confidence: 98%

CFD Multifluid Simulation of Spouted Beds with and without Internal Draft Tubes

Rahimi¹,

Azizi²

2011

Chemical Product and Process Modeling

View full text Add to dashboard Cite

The insertion of an axially positioned non-porous and porous draft tube into the conventional spouted bed has shown potential advantages in stability and flexibility of the system and controlling particle trajectory history. In this work with computational fluid dynamics (CFD), important information on the flow field within three types of spouted bed has been provided and influences of using internal tube on spouted beds hydrodynamics were investigated. The simulation used the multi-fluid Eulerian-Eulerian approach based on kinetic theory of granular flows (KTGF), incorporating a kinetic-frictional constitutive model for dense assemblies of particulate solids and Gidaspow's drag model for the interaction between gas and particles. Finally, the modeling results were compared with the experimental data from literature.

show abstract

“…The pyrolysis of biomass or waste plastic have been tested and validated at the lab and pilot scale as well as the combustion of wood charcoal or biomass . SBRs have also been applied to the gasification of coal, biomass, and mixtures of biomass with plastics …”

Section: Introductionmentioning

confidence: 99%

“…The pyrolysis of biomass [11,12] or waste plastic [13] have been tested and validated at the lab and pilot scale as well as the combustion of wood charcoal [14] or biomass. [15,16] SBRs have also been applied to the gasification of coal, [17] biomass, [18,19] and mixtures of biomass with plastics. [20] A SBR is obtained by replacing the perforated base of traditional fluidization reactors with one with a single central gas inlet.…”

Section: Introductionmentioning

confidence: 99%

Preliminary tests for the thermo‐chemical conversion of biomass in a spouted bed pilot plant

Bove

Moliner²,

Curti

et al. 2018

Can J Chem Eng

View full text Add to dashboard Cite

The initial setting up and preliminary tests on a square‐based spouted bed gasifier at pilot scale (20 kWth) have been investigated. The novel plant is composed of: a squared‐base spouted bed unit, a feeding system to regulate the biomass mass inflow, an air pump, a clean‐up system, and an online gas chromatograph analyzer to assess the quality of the produced gas. The profile of temperatures along the reactor has been monitored with different thermocouples during experimental tests. The start‐up process has been optimized to reduce the time to achieve stationary conditions. Two different materials (wood pellets and prunings from apple trees) have been tested at different feeding rates. Wood pellets were used to validate the performance of the spouted bed reactor and afterwards, residues of prunings from apple trees were validated as a suitable potential feedstock for energy recovery purposes. In addition, a representative sample of char from wood pellet gasification has been collected and characterized. In particular, the properties of specific surface area, pore size, and pore distribution have been measured by the Brunauer‐Emmett‐Teller method. The obtained outcomes represent one of the few available results in literature using a square‐based spouted bed reactor for the gasification of biomass at pilot scale.

show abstract

Coal gasification in a jet‐spouted bed

Cited by 21 publications

References 5 publications

Modelling of Spouted and Spout-Fluid Beds: Key for Their Successful Scale Up

Modelling of Spouted and Spout-Fluid Beds: Key for Their Successful Scale Up

CFD Multifluid Simulation of Spouted Beds with and without Internal Draft Tubes

Preliminary tests for the thermo‐chemical conversion of biomass in a spouted bed pilot plant

Contact Info

Product

Resources

About