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 technological process typically employing a dual fluidized bed system. Copper oxide as an oxygen carrier for chemical looping combustion. Chemicallooping with oxygen uncoupling for combustion of. The combustion and reoxidation properties of direct coal chemical looping combustion clc over cuo, fe2o3, co3o4, nio, and mn2o3 were investigated using thermogravimetric analysis tga and benchscale fixedbed flow reactor studies. Doenetl cooperative agreement benchscale testing and engineering studies technoeconomic studies on 4 lclc cases. In relative to the single metal oxidebased oxygen carrier oc, combined oc owned superiority for clc of coal. Chemical looping combustion is a promising method to realize the near zero emissions of co2 without any excessive energy penalty. Chemical looping combustion r porrazzo and r ocone chemical engineering heriotwatt university edinburgh eh144as r. The data acquisition was done by process eye professional software. A chemical looping combustion process for producing heat or steam or both from a hydrocarbon fuel. Chemical looping combustion for co2neutral gas facilities by cordis a novel gas combustion method removing the need for expensive gas. 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 stream. Aug 29, 2014 chemical looping combustion clc of coal has gained increasing attention as a novel combustion technology for its attractive advantage in the inherent separation of co2.
Chemical looping is an advanced form of oxyfuel combustion that does away with the need for an expensive asu. Among the wellknown stateofart technologies for co2 capture, chemical looping combustion clc stands out for its potential to capture with high efficiency the co2 from a fuel power plant for electricity generation. Chemical looping combustion with oxygen uncoupling clou efficient chemical looping scheme for solid fuel conversions oxygen releases help combust the coal and volatiles released. In clc, a metal oxide is employed as a bed material providing the oxygen for combustion in the fuel reactor. 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 chemical looping combustion clc is an innovative carbon capture technology among the most interesting ones. The oxidation reaction in the air reactor is always exothermic, releasing a significant quantity of. Review of the recent chemical looping process developments. Redox reactions are characterized by the transfer of electrons between chemical species, most often with one species the reducing agent undergoing oxidation losing electrons while another species the. Chemical looping or chemical looping combustion clc is a novel technology that could provide the means to convert fossil fuels to electricity and provide carbon capture without significant efficiency or cost penalties. In the first the oxygen carrier is heated in the presence of air, when it preferentially captures oxygen, leaving a stream of nitrogen.
Combined calcium looping and chemical looping combustion. Capture of co2 using chemicallooping combustion tobias mattisson and anders lyngfelt department of energy conversion chalmers university of technology, s412 96 goteborg, sweden abstract chemicallooping combustion clc is a new combustion technology with inherent separation of the greenhouse gas co2. Mitchell high temperature gasdynamics laboratory thermosciences group mechanical engineering department stanford university palo alto, ca 94305 abstract copper ii oxide cuo has been investigated as an oxygen carrier for a chemical looping. Chemical looping combustion for co2neutral gas facilities. Other groups having reported work with liquid fuels in processes related to chemical looping combustion includes pimenidou et al. This theoretical study for chemical looping combustion of methane was done to consider some key technology development points to help the process engineer choose. There are several smaller systems tga and fixed bed which are used for calibration of reaction models. This oxide is then reduced using a hydrocarbon as reducer in a second reaction. By using a substance which has the ability to oxidize and reduce relatively efficiently oxygen may. Chemical looping combustion clc and looping cycles in general represent an important new class of technologies, which can be deployed for direct combustion as well as be used in gasification applications. Chemicallooping combustion and chemicallooping with oxygen uncoupling use of combined manganese and iron oxides for oxygen transfer golnar azimi division of environmental inorganic chemistry department of chemical and biological engineering chalmers university of technology goteborg, sweden, 2014. Analysis of natural gasfired power cycles with chemical looping. Chemical looping combustion chemical looping process chemical looping is a process to indirectly oxidize fuels with air, converting the chemical energy in fuels to thermal energy.
Transfer of oxygen between air and fuel takes place with the aid of an oxygencarrier oc. Copper oxide as an oxygen carrier for chemical looping. C02 contained in the flue gas is absorbed by carbon carrier solid sorbent and released in a. The combination of calcium looping and chemical looping combustion, replacing the required air separation unit, is a way to reduce the energy penalty of the capture process. Besides challenging, technology needs and cost are high.
Chemicallooping combustion with fuel oil in a 10 kw pilot plant. Combined chemical looping combustion and calcium looping for enhanced hydrogen production from biomass gasification by ryad abdul rahman thesis submitted to the faculty of graduate and postdoctoral studies in partial fulfillment of the requirements for the degree of m. Chemical looping combustion multiphase flow science. Therefore, separation and sequestration of co 2 has become an important topic as well. The technique involves the use of a metal oxide as an oxygen carrier which transfers oxygen from combustion air to the fuel, and hence a. Moreover, manual valves were installed at the gas exit of the cyclones permitting pressure control at.
Chemical looping combustion clc is a rather novel concept of hydrocarbon fuel. Chemicallooping combustion and chemicallooping with oxygen. The result is one stream of co 2 and water and other with n 2 and o 2 11. Co2 capture using chemicallooping combustion chalmers. Chemical looping combustion clc of coal has gained increasing attention as a novel combustion technology for its attractive advantage in the inherent separation of co 2.
Chemical looping involves an innovative approach to deliver only oxygen to the coal combustion process, excluding other gases, such as nitrogen found in air. Chemical looping combustion science topic explore the latest questions and answers in chemical looping combustion, and find chemical looping combustion experts. Chemicallooping combustion clc is a new combustion technology with inherent separation of the greenhouse gas co2. Chemical looping combustion clc has arisen during last years as a very promising combustion technology for power plants and industrial applications, with inherent co 2 capture which reduces the energy penalty imposed on other competing technologies. The carbon dioxide from the combustion is inherently separated from the rest of the flue gases. Oxyfuel combustion network alstom chemical looping j. Chemical looping combustion clc differs from conventional combustion processes in that air and fuel are never in direct contact. Alstoms chemical looping combustion technology with co 2 capture for new and retrofit coal fired power plants. Thermodynamic study of combining chemical looping combustion and combined reforming of propane, fuel, vol. Clean energy generation using methane can be accomplished by using chemical looping combustion. It employs the oxidationreduction characteristics of a metal, or oxygen carrier, and its oxide, the oxidizing gas typically air and the fuel source may be kept separate. In this paper the reactivity behavior of calcium sulfate caso4 as oxygen carrier oc with coal chars are investigated. Chemical looping combustion clc is nowadays an attractive option to decrease the greenhouse gas emissions affecting global warming, because it is a combustion process with inherent co2 separation and, therefore, without energy losses.
Clc is an indirect fuel combustion strategy in which metal oxide is used, which is an oxygen carrier and a combustion intermediate between the air and the fuel 1, which never mix in the clc process. The mit and masdar institute cooperative program is an ongoing collaborative program with abu dhabi to provide advice and guidance in the establishment of a graduate research university masdar institute focused on alternative energy, sustainability, and advanced technology. Chemicallooping with oxygen uncoupling clou is a novel method to burn solid fuels in gasphase oxygen without the need for an energy intensive air separation unit. Chemical looping combustion of coal united states energy. Carbonate looping is a very efficient post combustion c02 capture tech nology with lowest energy demand and c02 mitigation cost compared to other post combustion ccs processes. Chemical looping combustion clc and looping cycles in general represent an important new class of. Review of the recent chemical looping process developments for novel energy and fuel applications behdad moghtaderi priority research centre for energy, chemical engineering, school of engineering, faculty of engineering and built environment, the university of newcastle, callaghan, new south wales 2308, australia. Chemicallooping combustion of solid fuels status of. Fan department of chemical and biomolecular engineering the ohio state university columbus, ohio 43210 by. Typical materials used are based on cuo and mn 2 o 3.
Chemical looping combustion of highsulfur coal with nife2o4. 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. In its simplest form, an oxygen carrying species normally a metal is first oxidized in air forming an oxide. Combined calcium looping and chemical looping combustion process simulation applied to co2 capture by benoit duhoux thesis submitted to the faculty of graduate and postdoctoral studies in partial fulfillment of the requirements for the m. This theoretical study for chemical looping combustion of methane was done to consider some key technology development points to. The required reactivities of oxygen carriers, suitable for such a process, are estimated. The clc operated with an interconnected moving bed with a fluidized bed system has also been employed as a technology process. Applicazione di processi chemical looping combustion in.
In this system fuel and combustion air never are in contact. Chemicallooping combustion in a 10 kw prototype using a cuo. Chemical looping combustion clc uses two or more reactions to perform the oxidation of hydrocarbon based fuels. Chemical looping combustion an overview sciencedirect. Chemical looping combustion of solid fuels sciencedirect. Chemical looping combustion of coal 5 the history of chemical looping combustion has been well summarised by lyngfelt and others lyngfelt and others, 2008. 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. Chemicallooping combustion, biomass, dual circulating fluidized beds. Co2 capture, chemicallooping combustion, ilmenite, coal, oxygen carrier.
Modeling and numerical simulation of coupled reactive. The leftmost figure shows the single fluid bed reactor. The clc system is made of two interconnected reactors, designated as air and fuel reactors. Chemical looping process experimental systems from the perspective of and modeling simulation, netl has three systems onsite for validation of chemical looping models. Aug 09, 2017 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. Chemicallooping combustion and gasification of coals. Progress in chemicallooping combustion and reforming. Chemical looping combustion multiphase flow science group.
Chemical looping combustion and steambased gasification. Oxygen carrier is oxidized in the air reactor and reduced in the fuel reactor. This paper investigates the chemical looping combustion of coal using a cementcao decorated iron ore as oxygen. Comparison of bimetallic fecu and feca oxygen carriers. The primary benefit of chemical looping combustion is that the contents of the flue gasses can be simplified. Combined chemical looping combustion and calcium looping for. Chemicallooping combustion clc is an unmixed combustion concept where. Chemical looping combustion clc is one promising fuel combustion technology, which can facilitate economic co 2 capture in coalfired power plants. 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. And to maria as the new acquisition in the office and arturo as novelty. When coal is heated in either nitrogen or carbon dioxide co2, 50% of weight loss was observed because of partial pyrolysis, consistent.
Task 2 final report, doenetl cooperative agreement no. A fluidizedbed combustion process with inherent co2. Packed bed chemicallooping combustion, experimental demonstration and energy analysis concerns about the role of anthropogenic greenhouse gas emissions on the observed climate change have resulted in great research efforts to develop new technologies that reduce the anthropogenic emission of especially carbon dioxide into the atmosphere. Chemicallooping combustion of coal with metal oxide. Chemical looping combustion clc is a promising co2 capture option since it. In recent years, chemical looping combustion clc has received interest due to its huge potential as a co2 separation technology. Process simulation and optimisation using aspen plus presented by sanjay mukherjee post graduate researcher university of surrey, uk supervisor co rsupervisor dr. Chemical looping combustion of coal for co capture. Chemical looping combustion clc is a novel combustion technology with inherent separation of greenhouse. 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. Apr 08, 20 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. Chemicallooping combustion with fuel oil in a 10kw pilot plant patrick moldenhauera, magnus ryden a, tobias mattisson, ali hoteit b, aqil jamal, anders lyngfelta achalmers university of technology, department of energy and environment, 41296 gothenburg, sweden. Chemical looping combustion of syngas has been investigated in a pressurized. This enables an almost pure co 2 gas to be produced, which can then be relatively easily stored without any further major processing.
Hybrid clc hclc aims to combine these processes into a complementary. Chemicallooping combustion is one viable solution to co 2 capture. Co2 capture by using chemical looping combustion clc mit. The discussion of co 2 output has risen to the forefront of many peoples minds in the world. Pdf chemicallooping combustion using biomass as fuel. Chemical looping combustion is very similar to oxyfuel combustion where there is no direct contact between air and fuel. In one configuration, which constitutes only a minor 85 modification from chemical looping combustion, steam is cofed with methane in the fuel. Advanced oxy combustion project objectives and status. Chemical looping combustion clc is an emerging clean energy. Presentation identifier title or location, month 00, 2008 issues in chemical looping combustion 2006 netl multiphase workshop april 2223, 2009. Chemical looping combustion and steambased gasification jens wolf doctoral thesis 2004 kth royal institute of technology department of chemical engineering and technology energy processes se100 44 stockholm, sweden. Chemicallooping combustion and chemicallooping with. Environmental impacts of a chemical looping combustion power plant. Pdf chemical looping combustion clc promises a unique potential.
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 is an alternative to direct fuel combustion, one that is suggested will give significant cost reduction per kg co 2 captured, mainly due to the fact that the stream of flue gases leaving the fuel reactor see figure 8. Chemical looping combustion of coal for co 2 capture. 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. Chemical looping combustion is one type of oxyfuel combustion process. Copper oxide as an oxygen carrier for chemical looping combustion eli a. Mar 17, 2020 chemical looping combustion is a technique that utilizes metal oxides instead of air in the process of burning fuel. This theoretical study for chemical looping combustion of methane was done to. In chemical looping combustion the properties of the oxygen carrier can be optimized to minimize these flows.
Chemical looping combustion of highsulfur coal with. By using a substance which has the ability to oxidize and reduce. Chemical looping combustion is a new combustion mode based on zero co2 emission. Pdf chemical looping combustion and reforming researchgate. Finally, chemical looping combustion clc refers to the use of oxygen carriers metal oxides in two fluidized bed reactors. In chemical looping combustion clc, the choice of the. It can be difficult and costly to separate carbon dioxide from nitrogen oxide, or to sequester carbon directly from the air. Investigation of a chemical looping combustion clc hal univ. Chemical looping combustion clc is a promising novel combustion. These systems typically use a fluidized bed to circulate metal oxides into a reaction chamber, where they provide the oxygen necessary for combustion.
Thermal integration of closed, indirect supercritical co2. A design of a combustor based on chemical looping combustion with two interconnected fluidized beds is proposed. Methane is a reliable and an abundantly available energy source occurring in nature as natural gas, biogas, landfill gas, and so forth. Chemicallooping combustion clc is a combustion technology with inherent separation of the greenhouse gas co 2. Experimental demonstration of chemicallooping combustion of.
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