Chemical looping, a low carbon technology for the fossil fuel industry, is increasingly been viewed as a competitive technology in carbon capture and storage, with the successful completion of. Chemical looping combustion clc is a technological process typically employing a dual fluidized bed system. Integrated environmental control model technical documentation chemical looping combustion 2 introduction chemical looping combustion clc is an indirect combustion process in which fuel is combusted without direct contact with air. Ocone thermoeconomic investigation of a chemical looping combustionbased power. Investigation of a chemical looping combustion clc hal univ. Pdf chemical looping combustion and reforming researchgate. Therefore, separation and sequestration of co 2 has become an important topic as well.
Oxygen is transferred from the combustion air to the fuel by an oxygen carrier, which is usually a metal oxide, and. The video explains what is chemicallooping combustion. Chemical looping combustion of coal united states energy. The disclosed systemsmethods provide a clc fixedbed reactor design in which the direction of the fuel gas is intermittently reversed during a single fuel. It consists of an alternative method of combustion that allows to obtain a stream of oxidation products co2 and h2o, ready for carbon sequestration after water separation and co2 liquefaction and a stream of hot air used as.
Because of those characteristics it could potentially play a significant role in achieving large. Haider,a lunbo duan,a,c kumar patchigolla,b and edward j. The use of mineral materials as oxygen carriers for chemical looping combustion clc is an attractive option due to their low cost. The possibility of using na 2 co 3 and k 2 co 3 in order to modify fe 2 o 3 al 2 o 3 oxygen carriers for practical chemical looping combustion processes was investigated. Chemical looping combustion clc is a new combustion technology with inherent separation of the greenhouse gas co2. Chemical looping combustion clc is an emerging technology for clean energyproduction. Chemical looping combustion clc is a twostep combustion technology for power and heat generation with inherent co2 capture, using either gaseous fuels or. Advantages and drawbacks of two different approaches for the clc of biomass are evaluated.
Anthonya this study explores the use of a dual interconnected circulating fluidized bed cfb for chemical looping combustion. In this chapter, the costs and energy penalty of co 2 capture using clc with solid fuel are. An effective oxygen carrier for clc will readily react with the fuel gas and will be reoxidized upon contact with oxygen. Chemicallooping combustion clc is a novel combustion technology with inherent separation of greenhouse. Chemical looping combustion for co2neutral gas facilities. This project focuses on chemical looping combustion clc as an option to capture co2 with a significantly lower energy penalty than other existing carboncapture technologies. The clc system is made of two interconnected reactors, designated as air and fuel reactors.
Chemicallooping combustion clc is a promising technology for future energy conversion on the basis of combustion of fossil fuels with inherent co 2 separation. Chemicallooping combustion clc is an attractive technology to decrease greenhouse gas emissions affecting global warming, because it is a combustion process with inherent co2 separation and. Chemical looping combustion multiphase flow science. Chemical looping combustion clc is a promising novel. Chemical looping combustion an overview sciencedirect. Pdf chemicallooping combustion using biomass as fuel. Chemical looping combustion clc for steampower is one of the lowest potential cost costofelectricity technical approaches that alstom has identified to date for coal power with carbon capture. Chemical looping combustion an overview sciencedirect topics.
The chemical looping combustion clc concept is based on the transfer of oxygen from the combustion air to the fuel by means of an oxygen carrier in the form of a metal oxide, avoiding the direct contact between fuel and air. Thermal analysis of chemicallooping combustion sciencedirect. Chemicallooping combustion clc is a combustion technology with inherent separation of the greenhouse gas co2. A hydrodynamic study of a fastbed dual circulating fluidized bed for chemical looping combustion. Lyngfelt, the use of petroleum coke as fuel in chemicallooping combustion, fuel 86, 19471958, 2007. This paper investigates the chemical looping combustion of coal using a cementcao decorated iron ore as oxygen. Chemicallooping combustion clc is an alternative to traditional, singlestage combustion that performs the oxidation of fuels using two reactions, in separate vessels. Eclair emission free chemical looping coal combustion process using ilmenite type i. Co2 capture by using chemical looping combustion clc.
Hence the direct contact between fuel and combustion air is avoided. Investigation of chemical looping combustion by solid. Chemical looping combustion clc is an alternative combustion technology with inherent. Particle velocity in freeboard of fluidized bed before entrance into the cyclone, m s. Denne metoden er billigere og mindre energikrevende enn mange andre metoder som te. This section explains the fundamentals of the chemicallooping combustion process using metal oxides as oxygencarriers, being mainly focused in description of results obtained with gaseous fuels, although references to the solid fuelled clc and clr are done in some cases.
Chemicallooping combustion simulation model with aspen. These processes are based on the transfer of the oxygen from air to the fuel by means of a solid oxygencarrier avoiding direct contact between fuel. Chemical looping combustion of hematite ore with methane and. Natural ores as oxygen carriers in chemical looping combustion. Chemical looping combustion clc differs from conventional combustion processes in that air and fuel are never in direct contact. The gaseous fuel, typically natural gas, is fed to the fuel. Chemical looping processes are characterized as promising carbonaceous fuel conversion technologies with the advantages of manageable co capture and high energy conversion efficiency. The process, called chemical looping combustion clc, operates at conditions similar to those present in todays power plants. Chemical looping combustion is an indirect form of combustion in which an oxygencontaining solid material, typically a metal oxide, supplies the oxygen to a fuel, and the spent oxygen carrier is separately regenerated by high temperature reaction in an air. The chemical looping combustion clc is an innovative carbon capture technology among the most interesting ones. Advancements in development of chemicallooping combustion. Systems and methods are provided for enhancement of gaseous clc in a fixedbed process, marked by an increase in co 2 capture efficiency and oxygen carrier utilization, while reducing disadvantages of a conventional fixedbed operation. Chemical looping combustion clc is a circulating combustion process in which the. Chemicallooping combustion is one viable solution to co 2 capture.
Comprehensive introductory textbooks on the subject of fuels have never been plentiful despite the lip service paid to the importance of energy to living standards, especially in the industrialised countries of the world. The discussion of co 2 output has risen to the forefront of many peoples minds in the world. An additional species circulates between the oxidizer and reducer carrying oxygen atoms. This paper investigates the chemical looping combustion of coal using a cementcao decorated iron ore as. Chemical looping combustion is considered an indirect method of oxidizing a carbonaceous fuel, utilizing a metal oxide oxygen carrier to provide oxygen to the. In clc, an oxygen carrier is periodically oxidized with air and then reduced in contact with a fuel.
Chemical looping for hydrogen production sciencedirect. Oxidation of different types of iron oxide particlesapplication to chemicallooping combustion. Progress in chemicallooping combustion and reforming. Transfer of oxygen between air and fuel takes place with the aid of an oxygencarrier oc.
By using a substance which has the ability to oxidize and reduce relatively efficiently oxygen may be inherently. Applicazione di processi chemical looping combustion in. Instead, an oxygen carrier, typically a metal oxide such as fe 2o 3 or cuo, is circulated between a fuel reactor and an air reactor to transfer the oxygen. Chemical looping combustion clc is a promising technology for fossil fuel combustion that produces sequestrationready cosub 2 stream, reducing the energy penalty of cosub 2 separation from flue gases. Chemical looping combustion clc is an innovative method to oxidize fuels with inherent co 2 sequestration that uses wellestablished boiler technology similar to circulatingfluidized bed boilers cfb. Extensive research has been performed on clc in the last decade with respect to oxygen carrier development, reaction kinetics, reactor design, system efficiencies, and prototype testing. The key issues considered in the project are related to i. Introduction in the first paper of this twopart series, the theoretical framework of the chemical looping combustion process clc of solid fuels was established on the basis of an analysis of the. Chemical looping is a process to indirectly oxidize fuels with air, converting the chemical energy in fuels to thermal energy.
Clc is a promising technology for fossil fuel combustion preventing co 2 dilution with flue gases, mainly nitrogen. Chemicallooping combustion clc is a new combustion technology with inherent separation of the greenhouse gas co2. Chemicallooping combustion a thermodynamic study n r. The chapter first shows the principles of each technology. Evaluation of manganese minerals for chemical looping. This paper reports an experimental study of four manganese minerals as potential oxygen carriers focusing on the behavior in clc as well as in chemical looping with oxygen uncoupling clou. In clc technology, the oxygen for combustion is supplied by a solid oxygen carrier, avoiding direct contact between fuel and air and producing inherent co 2 capture. Depending on the chemical looping reaction products generated, chemical looping technologies generally can be grouped into two types. A technology development view article pdf available november 20 with 216 reads how we measure reads. A chemical looping combustion process for producing heat or steam or both from a hydrocarbon fuel. Experiments were carried out in a thermogravimetric apparatus tga and. The technique involves the use of a metal oxide as an oxygen carrier which transfers oxygen from the combustion air to the fuel.
Oxygen carrier in chemical looping combustion for co 2 capture, accepted by fuel. In contrast to direct oxidation with air, carbon dioxide and nitrogen are in different exhaust streams. The addition of alkali metal to more than 3 % could improve the reactivity. Pdf on sep, 2011, stefan penthor and others published. Promoting chemical looping combustion r esearchers are enabling power generation with a simple way to control carbon dioxide co 2 by combusting fossil fuel in nearly pure oxygen rather than air. This chapter describes in detail four types of hydrogen production by using chemical looping technologies with co 2 capture.
Chemical looping systems can directly be engaged as an effective means for syngas production. However, most co2 resulting from either ng combustion or other processes is released into the atmosphere without capture. Unlike in conventional combustion processes, in clc, the fuel and oxidizer are never in contact during the combustion process, more properly named conversion process. In clc, a metal oxide is employed as a bed material providing the oxygen for combustion in the fuel reactor. Chemical looping combustion clc, an advanced coal power technology that could markedly simplify carbon capture at power plants, has moved. Chemicallooping combustion clc is an innovative method to oxidize fuels with inherent co 2 sequestration that uses wellestablished boiler technology similar to circulatingfluidized bed boilers cfb. Chemical looping combustion for co2neutral gas facilities by cordis a novel gas combustion method removing the need for expensive gas separation has been successfully scaledup. Copper oxide as an oxygen carrier for chemical looping. A metal oxide oxygen carrier is reduced from an initial oxidation state in a first reduction reaction with a hydrocarbon fuel to provide co 2, h 2 o, heat, and a reduced metal or metal oxide having a first reduced state, the first reduced state lower than the initial oxidation state, and then. Thanks to kartikeya mahalatkar ansysfluent dave huckaby netldoe john kuhlman netlwvu. Pdf applications of chemicallooping combustion with. A hydrodynamic study of a fastbed dual circulating. Chemical looping reforming and gasification wikipedia. Biomass combustion using chemical looping combustion clc can make the concept of co 2 negative emissions feasible.
Clc is thus a flameless oxyfuel combustion without an ai r separation unit, producing sequestrationready co2streams without significant energy penalty. The clc operated with an interconnected moving bed with a fluidized bed system has also been employed as a technology process. Chemical looping combustion and steambased gasification. Co2 capture from coal combustion using chemicallooping combustionreactivity investigation of fe ni and mn based oxygen carriers using syngas. These processes are based on the transfer of the oxygen from. The worldwide consumption of natural gas ng and other fossil fuels e.
Us20150241056a1 reactor for chemicallooping combustion. Chemical looping combustion is a new combustion mode based on zero co2 emission. In clc, the solid oxygen carrier supplies the stoichiometric oxygen needed for co 2 and water formation, and this leads to a free nitrogen mixture. In chemicallooping combustion, a gaseous fuel is burnt with inherent separation of the greenhouse gas co2.
The technique involves the use of a metal oxide as an oxygen carrier, which transfers oxygen from the combustion air to the fuel, and hence the direct contact between fuel and combustion air is avoided. Lyngfelt, the use of petroleum coke as fuel in chemical looping combustion, fuel 86, 19471958, 2007. Revolutionary chemical looping technology advances clean. Solid fuels in chemicallooping combustion pdf free download. Lyngfelt, in calcium and chemical looping technology for power generation and carbon dioxide co2 capture, 2015. Co2 capture with chemical looping combustion of gaseous. Compared to the conventional partial oxidation pox or autothermal reforming atr processes, the key advantage of the chemical looping reforming clr process is the elimination of the air separation unit asu for oxygen production. Chemicallooping combustion clc of solid fuels is a novel combustion technology with the potential to drastically reduce the costs associated with co 2 capture.
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