Therefore, separation and sequestration of co 2 has become an important topic as well. Revolutionary chemical looping technology advances clean. 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. 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. In chemicallooping combustion, a gaseous fuel is burnt with inherent separation of the greenhouse gas co2. 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. Chemicallooping combustion clc of solid fuels is a novel combustion technology with the potential to drastically reduce the costs associated with co 2 capture.
Chemicallooping combustion clc is a new combustion technology with inherent separation of the greenhouse gas co2. Chemical looping combustion clc is a circulating combustion process in which the. Pdf chemicallooping combustion using biomass as fuel. Us20150241056a1 reactor for chemicallooping combustion. Co2 capture from coal combustion using chemicallooping combustionreactivity investigation of fe ni and mn based oxygen carriers using syngas. Chemical looping combustion is considered an indirect method of oxidizing a carbonaceous fuel, utilizing a metal oxide oxygen carrier to provide oxygen to the. Clc is a promising technology for fossil fuel combustion preventing co 2 dilution with flue gases, mainly nitrogen. Investigation of a chemical looping combustion clc hal univ. This paper investigates the chemical looping combustion of coal using a cementcao decorated iron ore as. The use of mineral materials as oxygen carriers for chemical looping combustion clc is an attractive option due to their low cost.
Chemical looping combustion clc is a twostep combustion technology for power and heat generation with inherent co2 capture, using either gaseous fuels or. Chemicallooping combustion is one viable solution to co 2 capture. This paper investigates the chemical looping combustion of coal using a cementcao decorated iron ore as oxygen. The clc operated with an interconnected moving bed with a fluidized bed system has also been employed as a technology process. Pdf on sep, 2011, stefan penthor and others published.
Chemical looping systems can directly be engaged as an effective means for syngas production. Chemical looping reforming and gasification wikipedia. Chemical looping combustion clc is an emerging technology for clean energyproduction. 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. The chapter first shows the principles of each technology. 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. By using a substance which has the ability to oxidize and reduce relatively efficiently oxygen may be inherently. Lyngfelt, the use of petroleum coke as fuel in chemicallooping combustion, fuel 86, 19471958, 2007. Transfer of oxygen between air and fuel takes place with the aid of an oxygencarrier oc. Chemical looping combustion multiphase flow science. Chemicallooping combustion a thermodynamic study n r.
The clc system is made of two interconnected reactors, designated as air and fuel reactors. In clc, a metal oxide is employed as a bed material providing the oxygen for combustion in the fuel reactor. 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. 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. 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. Because of those characteristics it could potentially play a significant role in achieving large. The discussion of co 2 output has risen to the forefront of many peoples minds in the world. Chemical looping combustion clc differs from conventional combustion processes in that air and fuel are never in direct contact. Chemicallooping combustion clc is a novel combustion technology with inherent separation of greenhouse. A hydrodynamic study of a fastbed dual circulating. The addition of alkali metal to more than 3 % could improve the reactivity. However, most co2 resulting from either ng combustion or other processes is released into the atmosphere without capture. Solid fuels in chemicallooping combustion pdf free download.
Oxygen carrier in chemical looping combustion for co 2 capture, accepted by fuel. Natural ores as oxygen carriers in chemical looping combustion. The gaseous fuel, typically natural gas, is fed to the fuel. The technique involves the use of a metal oxide as an oxygen carrier which transfers oxygen from the combustion air to the fuel. Particle velocity in freeboard of fluidized bed before entrance into the cyclone, m s. Chemicallooping combustion clc is a promising technology for future energy conversion on the basis of combustion of fossil fuels with inherent co 2 separation. Investigation of chemical looping combustion by solid. Chemical looping combustion for co2neutral gas facilities. The disclosed systemsmethods provide a clc fixedbed reactor design in which the direction of the fuel gas is intermittently reversed during a single fuel. Chemicallooping combustion clc is a combustion technology with inherent separation of the greenhouse gas co2. 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. In contrast to direct oxidation with air, carbon dioxide and nitrogen are in different exhaust streams. 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.
Experiments were carried out in a thermogravimetric apparatus tga and. A hydrodynamic study of a fastbed dual circulating fluidized bed for chemical looping combustion. Pdf chemical looping combustion and reforming researchgate. The key issues considered in the project are related to i. Ocone thermoeconomic investigation of a chemical looping combustionbased power.
Applicazione di processi chemical looping combustion in. Biomass combustion using chemical looping combustion clc can make the concept of co 2 negative emissions feasible. Thanks to kartikeya mahalatkar ansysfluent dave huckaby netldoe john kuhlman netlwvu. Chemical looping combustion is a new combustion mode based on zero co2 emission. 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. Anthonya this study explores the use of a dual interconnected circulating fluidized bed cfb for chemical looping combustion. 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. Denne metoden er billigere og mindre energikrevende enn mange andre metoder som te. Copper oxide as an oxygen carrier for chemical looping. Chemical looping combustion clc is an alternative combustion technology with inherent. Unlike in conventional combustion processes, in clc, the fuel and oxidizer are never in contact during the combustion process, more properly named conversion process. Chemicallooping combustion clc is an alternative to traditional, singlestage combustion that performs the oxidation of fuels using two reactions, in separate vessels. The worldwide consumption of natural gas ng and other fossil fuels e.
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 clc is a promising novel. Co2 capture with chemical looping combustion of gaseous. Clc is thus a flameless oxyfuel combustion without an ai r separation unit, producing sequestrationready co2streams without significant energy penalty. Green berets ultralight bug out bag with gear recommendations duration. 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.
Oxidation of different types of iron oxide particlesapplication to chemicallooping combustion. Chemical looping combustion an overview sciencedirect. A chemical looping combustion process for producing heat or steam or both from a hydrocarbon fuel. Lyngfelt, in calcium and chemical looping technology for power generation and carbon dioxide co2 capture, 2015.
Chemical looping for hydrogen production sciencedirect. 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. In clc, an oxygen carrier is periodically oxidized with air and then reduced in contact with a fuel. 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. Depending on the chemical looping reaction products generated, chemical looping technologies generally can be grouped into two types. Advancements in development of chemicallooping combustion. 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. 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. The process, called chemical looping combustion clc, operates at conditions similar to those present in todays power plants. 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.
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 clc is a new combustion technology with inherent separation of the greenhouse gas co2. 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. Chemical looping combustion of coal united states energy. 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 combustion clc is a technological process typically employing a dual fluidized bed system.
Pdf applications of chemicallooping combustion with. A technology development view article pdf available november 20 with 216 reads how we measure reads. Chemical looping combustion and steambased gasification. An effective oxygen carrier for clc will readily react with the fuel gas and will be reoxidized upon contact with oxygen. Chemical looping combustion an overview sciencedirect topics. The video explains what is chemicallooping combustion. Chemical looping combustion clc, an advanced coal power technology that could markedly simplify carbon capture at power plants, has moved. Oxygen is transferred from the combustion air to the fuel by an oxygen carrier, which is usually a metal oxide, and. Advantages and drawbacks of two different approaches for the clc of biomass are evaluated.
Progress in chemicallooping combustion and reforming. 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. Evaluation of manganese minerals for chemical looping. In this chapter, the costs and energy penalty of co 2 capture using clc with solid fuel are. Thermal analysis of chemicallooping combustion sciencedirect. Eclair emission free chemical looping coal combustion process using ilmenite type i. The chemical looping combustion clc is an innovative carbon capture technology among the most interesting ones. 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.
An additional species circulates between the oxidizer and reducer carrying oxygen atoms. 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. Hence the direct contact between fuel and combustion air is avoided. Haider,a lunbo duan,a,c kumar patchigolla,b and edward j. Chemicallooping combustion simulation model with aspen. 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. This chapter describes in detail four types of hydrogen production by using chemical looping technologies with co 2 capture. Chemical looping combustion of hematite ore with methane and. 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. Co2 capture by using chemical looping combustion clc. Lyngfelt, the use of petroleum coke as fuel in chemical looping combustion, fuel 86, 19471958, 2007.
1480 1244 843 1171 179 1271 618 1499 1271 331 1245 376 491 654 1495 647 1344 409 570 1333 148 701 1184 255 83 957 826 1410 1293 605