Chemical-looping combustion of solid fuels in a 100 kW dual circulating fluidized bed system using iron ore as oxygen carrier

2016 ◽  
Vol 4 (1) ◽  
pp. 1029-1039 ◽  
Author(s):  
Carl Linderholm ◽  
Matthias Schmitz
Keyword(s):  
Fluidized Bed ◽  
Iron Ore ◽  
Circulating Fluidized Bed ◽  
Oxygen Carrier ◽  
Chemical Looping Combustion ◽  
Solid Fuels ◽  
Chemical Looping ◽  
Combustion Of Solid Fuels

scholarly journals Titanium substituted manganese-ferrite as an oxygen carrier with permanent magnetic properties for chemical looping combustion of solid fuels

Fuel ◽  
2017 ◽  
Vol 195 ◽  
pp. 38-48 ◽  
Author(s):  
María Abián ◽  
Alberto Abad ◽  
María T. Izquierdo ◽  
Pilar Gayán ◽  
Luis F. de Diego ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Oxygen Carrier ◽  
Chemical Looping Combustion ◽  
Solid Fuels ◽  
Chemical Looping ◽  
Manganese Ferrite ◽  
Combustion Of Solid Fuels

Studies on Solids Flow in a Cold Model of a Dual Fluidized Bed Reactor for Chemical Looping Combustion of Solid Fuels

2019 ◽  
Vol 142 (2) ◽  
Author(s):  
Kamil Idziak ◽  
Tomasz Czakiert ◽  
Jaroslaw Krzywanski ◽  
Anna Zylka ◽  
Wojciech Nowak
Keyword(s):  
Fluidized Bed ◽  
Pressure Sensors ◽  
Fluidized Bed Reactor ◽  
Chemical Looping Combustion ◽  
Solid Fuels ◽  
Chemical Looping ◽  
Oxygen Carriers ◽  
Cold Model ◽  
Dual Fluidized Bed ◽  
Combustion Of Solid Fuels

Abstract The results of investigations on solids flow in a cold model of the dual fluidized bed reactor designed for chemical looping combustion of solid fuels (DFB-CLC-SF) are presented in this paper. The constructed unit consists of two interconnected reactors. The first one, so-called fuel reactor (FR), is operated under bubbling fluidized bed (BFB) conditions, whereas the second one, so-called air reactor (AR), is structurally divided into two sections. The bottom part of AR works under BFB while the upper part, i.e., the riser, is operated in the fast fluidized bed (FFB) regime. In these studies, the air was used for fluidization process in all parts of the DFB-CLC-SF reactor. The glass beads with similar parameters to oxygen carriers (OCs) used in the CLC process were utilized as an inventory. The fluidization conditions are controlled by using the sets of pressure sensors installed around the circulation loop. The experimental data acquired in the tests are further employed to the analysis of solids behavior in a cold model of the DFB-CLC-SF reactor. The main goal of these studies was to establish the conditions for smooth fluidization, which concurrently provide the required residence time of solids in both reactors that is one of the most crucial factors in the CLC process. It was found that the fluidizing gas velocity in reactors has a significant impact on solids behavior and the investigated parameters. However, what is the most important, it was confirmed that the operation condition of the DFB-CLC-SF reactor can be adjusted to meet the requirements resulting from the properties of OCs.

scholarly journals Experimental Investigation on Mixing and Segregation Behavior of Oxygen Carrier and Biomass Particle in Fluidized Bed

2019 ◽  
Vol 63 (3) ◽  
pp. 188-194 ◽  
Author(s):  
Botond Szücs ◽  
Pál Szentannai
Keyword(s):  
Fluidized Bed ◽  
Alternative Fuels ◽  
Oxygen Carrier ◽  
Spherical Shape ◽  
Chemical Looping Combustion ◽  
Solid Fuels ◽  
Chemical Looping ◽  
Carbon Reduction ◽  
Active Particles ◽  
Fuel Particles

In this work, lab-scale cold fluidization equipment is designed and constructed to investigate the mixing and segregating phenomena of binary fluidized beds. The focus of the investigation is carbon reduction with the fluidized bed technology-based Chemical Looping Combustion (CLC). Nowadays, aspiration to carbon reduction focuses on the solid fuels. Therefore, it is of great importance to integrate the benefits of CLC technology with the use of solid fuels. The measurements of fuel particles in the fluidized bed are extended from the homogeneous and spherical shape to the inhomogeneous, non-spherical shape. During the tests, an iron-based oxygen carrier (OC) for chemical looping combustors is examined with different particle sizes. In addition, the tests included the examination of three different fuel samples (crushed coal, agricultural pellet, and Solid Recovered Fuel (SRF)), which can be utilized in chemical looping combustion with In-situ gasification. The experiments are carried out using the bed-frozen method. With this method, the vertical concentration of active particles could be measured. The results show that the particle size of the oxygen carrier does fundamentally influence its vertical placement, and the non-spherical character of most alternative fuels must also be considered for optimal reactor design.

scholarly journals Investigation of biomass alkali release in a dual circulating fluidized bed chemical looping combustion system

Fuel ◽  
2021 ◽  
Vol 297 ◽  
pp. 120743
Author(s):  
Ivan Gogolev ◽  
Toni Pikkarainen ◽  
Juho Kauppinen ◽  
Carl Linderholm ◽  
Britt-Marie Steenari ◽  
...  
Keyword(s):  
Fluidized Bed ◽  
Circulating Fluidized Bed ◽  
Chemical Looping Combustion ◽  
Chemical Looping ◽  
Combustion System
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