Experimental Investigations on a Novel Chemical Looping Combustion Configuration

Yazdanpanah, Mohammad Mahdi; Hoteit, Ali; Forret, Ann; Delebarre, Arnaud; Gauthier, Thierry

doi:10.2516/ogst/2010025

Cited by 12 publications

(7 citation statements)

References 24 publications

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“…Furthermore, this may impact significantly the operating costs of an industrial unit. The present study is part of the process studies conducted together by IFP Energies nouvelles and Total to develop a Chemical Looping Combustion process [2][3][4].…”

Section: Introductionmentioning

confidence: 99%

Development of an attrition evaluation method using a Jet Cup rig

et al. 2015

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Particles attrition is an important phenomenon to account for when developing and scaling up new fluidized bed processes. Most of the time, little amount of particles is available at the early development stage and only lab scale experiments can be carried out. Most of the available tools and methodologies to investigate attrition at small scale were developed for the FCC process on group A particles. However, attrition also needs to be evaluated for new applications such as Chemical Looping Combustion (CLC) with different particle properties. In this work, we propose a method using a jet cup apparatus that aims to compare attrition rate of solids having different properties. Materials studied in this paper are a Group A FCC catalyst (Dp 50 of 70 μm, grain density of 1450 kg/m 3 ) and a Group B CLC oxygen carrier (Dp 50 of 180 μm, grain density of 3600 kg/m 3 ). Based on experimental data and CFD modeling, comparative testing conditions could be defined in order to apply the same mechanical stress for all solids tested. Classical attrition indexes usually quantify the generation of fine particles below 40 μm which does not describe fully attrition of Group B powders. Therefore, a new attrition index was defined to calculate the total amount of particles generated by attrition over the entire size range of all solids tested. Finally, the attrition rates of both materials were compared applying the methodology developed. It was found that attrition rate is less important for the oxygen carrier. It is important to notice that attrition due to thermal or chemical stresses is not investigated in this study and needs separate evaluation.

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Section: Introductionmentioning

confidence: 99%

Development of an attrition evaluation method using a Jet Cup rig

et al. 2015

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“…The limitation among the air flow supplied and the solids circulation rate can be decoupled in other CLC configurations recently proposed, either by recirculating a fraction of the solids from the cyclone to the air-reactor [56,283,390,391] or by independent control of the solids circulation from the air-and fuel-reactors [333,392].…”

Section: Air-reactor Modellingmentioning

confidence: 99%

Progress in Chemical-Looping Combustion and Reforming technologies

Adánez

Abad

Garcı́a-Labiano

et al. 2012

Progress in Energy and Combustion Science

1,963

1,614

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This work is a comprehensive review of the Chemical-Looping Combustion (CLC) and Chemical-Looping Reforming (CLR) processes reporting the main advances in these technologies up to 2010. These processes are based on the transfer of the oxygen from air to the fuel by means of a solid oxygen-carrier avoiding direct contact between fuel and air for different final purposes. CLC has arisen during last years as a very promising combustion technology for power plants and industrial applications with inherent CO 2 capture which avoids the energetic penalty present in other competing technologies.CLR uses the chemical looping cycles for H 2 production with additional advantages if CO 2 capture is also considered.The review compiles the main milestones reached during last years in the development of these technologies regarding the use of gaseous or solid fuels, the oxygen-carrier development, the continuous operation experience, and modelling at several scales. Up to 2010, more than 700 different materials based on Ni, Cu, Fe, Mn, Co, as well as other mixed oxides and low cost materials, have been compiled. Especial emphasis has been done in those oxygen-carriers tested under continuous operation in Chemical-Looping 2 prototypes. The total time of operational experience (≈ 3500 h) in different CLC units in the size range 0.3-120 kW th , has allowed to demonstrate the technology and to gain in maturity. To help in the design, optimization, and scale-up of the CLC process, modelling work is also reviewed. Different levels of modelling have been accomplished, including fundamentals of the gas-solid reactions in the oxygen-carriers, modelling of the air-and fuel-reactors, and integration of the CLC systems in the power plant. Considering the great advances reached up to date in a very short period of time, it can be said that CLC and CLR are very promising technologies within the framework of the CO 2 capture options.

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“…An identical cold flow model was also used for investigation of the pneumatic valves in ambient conditions for different solids mentioned above. These devices are described in detail elsewhere [7].…”

Section: High Temperature Testing Unitmentioning

confidence: 99%

“…L-vale and loop-seal are the most comment devices of this kind which are widely used in CFB applications thanks to their simple construction, ease of operation, reliability, and low cost. Despite of their wide use, experimental studies on the impact of temperature on the operation of these devices are very rare in literature [7].…”

Section: Introductionmentioning

confidence: 99%