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102389

Enhancing Oxidation Process in Chemical Looping Combustion Applying Jet Fountain Fluidized Bed.

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Last updated: 04 Jan 2025

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Mechanical Power Engineering

Abstract

Chemical- Looping Combustion (CLC) has emerged as a very promising combustion technology for power plants and industrial applications with inherent CO2 capture. CLC avoids the energetic penalty present in other competing technologies. The technology basis is to transfer oxygen from air to the fuel by means of a solid oxygen-carrier avoiding direct contact between fuel and air. It consists of two successive reactions, oxidation and reduction, in two interconnected fluidized beds.  The aim of the current work is to enhance the oxidation process by applying jetting fountain fluidized bed. A jetting fountain fluidized bed reactor has been designed, fabricated and installed to carry out the experimental work. It has 105 mm ID and 4000 mm height. Activated ilmenite has been used as oxygen carrier. During the tests atmospheric air is fed through an ilmenite bed that reacts with oxygen. The oxygen concentrations are measured after the bed to estimate the quantities of oxygen that combined with bed materials. The influences of operating conditions including bed temperature, fluidization velocity, jet air ratio and jet orifice height on the process effectiveness have been studied.
The findings of the present work indicate that the jetting fountain fluidized bed is more effective in ilmenite oxidation where the oxidation conversion rate increases and the time required for full conversion reduces. Applying jetting fountain configuration enhances gas solids contact and improves the interphases mass exchange between bubbles and emulsion. The oxidation conversion rate was found to improve with bed temperature and fluidization velocity. On the other side, studying the influences of jet air ratio and jet orifice height demonstrate that there is an intermediate value at which the oxidation process records an optimal.
 

DOI

10.21608/bfemu.2020.102389

Keywords

Fluidized Bed, Chemical- Looping Combustion (CLC), CO2 capture ilmenite

Authors

First Name

A.

Last Name

Jawdat

MiddleName

-

Affiliation

Mechanical Power Engineering Dept., Faculty of Engineering, Monsoura University, Monsoura, Egypt

Email

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Orcid

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First Name

A.

Last Name

Hegazi

MiddleName

A.

Affiliation

Mechanical Power Engineering Dept., Faculty of Engineering, Monsoura University, Monsoura, Egypt

Email

-

City

-

Orcid

-

First Name

F.

Last Name

Okasha

MiddleName

-

Affiliation

Mechanical Power Engineering Dept., Faculty of Engineering, Monsoura University, Monsoura, Egypt

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-

City

-

Orcid

-

Volume

40

Article Issue

4

Related Issue

15416

Issue Date

2015-12-01

Receive Date

2015-10-01

Publish Date

2020-07-12

Page Start

1

Page End

13

Print ISSN

1110-0923

Online ISSN

2735-4202

Article File

BFEMU_Volume 40_Issue 4_Pages 1-13.pdf

PDF . 676.6kB

Link

https://bfemu.journals.ekb.eg/article_102389.html

Detail API

https://bfemu.journals.ekb.eg/service?article_code=102389

Order

10

Type

Research Studies

Type Code

1,205

Publication Type

Journal

Publication Title

MEJ. Mansoura Engineering Journal

Publication Link

https://bfemu.journals.ekb.eg/

MainTitle

Enhancing Oxidation Process in Chemical Looping Combustion Applying Jet Fountain Fluidized Bed.

Details

Type

Article

Created At

22 Jan 2023