Chemical looping reactors have traditionally been used in combustion related applications, and with innovation, chemical looping oxidative dehydrogenation offers an opportunity to reduce the energy emissions footprint of production of ethylene from ethane. Projects integrated chemical engineering ii chemical. This book presents the current carbonaceous fuel conversion technologies based on chemical looping concepts in the context of traditional or conventional technologies. Unlike in conventional combustion processes, in clc, the fuel and oxidizer are never in contact during the combustion process, more properly named conversion process. Co2 capture by using chemical looping combustion clc. Chemical process intensification, department of chemical engineering and chemistry, eindhoven university of technology, p. In this way, an almost pure co 2 product stream can be obtained after steam condensation directly from the combustion without. 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.
Copper oxide as an oxygen carrier for chemical looping. Advanced oxycombustion system without air separation unit no cryogenic air separation unit two interconnected boilers limestone as oxygen carrier fuel reactor air reactor reducer oxidizer. Oxygen stored within a solid metal oxide is used to combust the fuel, either by releasing the oxygen into the gas phase, or by direct contact with the fuel. Chemicallooping combustion clc is a combustion technology with inherent separation of the greenhouse gas co2. Oxyfuel combustion network alstom chemical looping j. Operating experience with chemical looping combustion in a 120kw dual circulating fluidized bed dcfb unit. Hence the direct contact between fuel and combustion air is avoided.
Based oxygen carrier for chemical looping combustion. Chemical looping combustion clc has been proposed as an efficient carbon capture process for power generation. Chemical looping combustion of refinery fuel gas with co 2 capture. Alstoms chemical looping combustion prototype for cosub. Chemical looping and oxy combustion both chemical looping and oxy combustion are mature technologies, but have some challenges that make adoption difficult. Pdf chemical looping combustion clc promises a unique potential for efficient co 2 capture from energy conversion processes. Combined chemical looping for energy storage and conversion. 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. Among the different options, chemical looping combustion clc is considered one of the most promising second generation. Chemical looping combustion clc is a technological process typically employing a dual fluidized bed system. Pdf chemicallooping combustion using biomass as fuel. Chemical looping combustion of solid fuels in a laboratory.
Doenetl cooperative agreement benchscale testing and engineering studies technoeconomic studies on 4 lclc cases. Alstoms chemical looping technology program update 4 june 2014 p 5 limestone chemical looping concept and options option 1 chemical looping combustion excess air to fuel product gas is co 2 heat produces steam for power option 2 chemical looping gasification excess fuel to air product gas is syngas no. By using a substance which has the ability to oxidize and reduce relatively efficiently oxygen may be inherently. Large scale in silico screening of materials for carbon.
Other groups having reported work with liquid fuels in processes related to chemical looping combustion includes pimenidou et al. Boilers, were a major part of the industrial revolution beginning about 1700. Advanced oxy combustion project objectives and status. The chemical looping combustion clc is an innovative carbon capture technology among the most interesting ones. National energy 2 technology laboratory chemical looping combustion basics reducer oxidizer fuel. Applicazione di processi chemical looping combustion in. 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. The design project is the opportunity to integrate the knowledge and skills acquired over the undergraduate years in the chemical engineering department. Pdf chemical looping combustion and reforming researchgate. Pdf using chemicallooping with oxygen uncoupling clou. Pdf on sep, 2011, stefan penthor and others published chemicallooping combustion using biomass as fuel find, read and cite all the. Chemical looping combustion clc differs from conventional combustion processes in that air and fuel are never in direct contact. Clc is a promising technology for fossil fuel combustion preventing co 2 dilution with flue gases, mainly nitrogen.
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. In clc, a metal oxide is employed as a bed material providing the oxygen for combustion in the fuel reactor. Distinguished university professor c john easton professor in engineering professor of chemical and biomolecular engineering the ohio state university. Contrary to a conventional combustion process, in clc, the fuel and oxidizer are. January, 2009 synthesis gas generation by chemical looping reforming using a. A high performance oxygen storage material for chemical. Here, we report a method for preparing of oxygen storage materials from layered double hydroxides ldhs. A fluidizedbed combustion process with inherent co2. Xray diffraction and tga kinetic analyses for chemical. Chemical looping combustion clc is a twostep cyclic process where an. Chemicallooping combustion clc is an emerging carbon capture technology that is characterized by a low energy penalty, low. Anders lyngfelt and hilmer thunman pdf 449 kb view. The clc operated with an interconnected moving bed with a fluidized bed system has also been employed as a technology process.
Chemical looping systems for fossil energy conversions wiley. Investigation of a chemical looping combustion clc hal univ. The data are supplementary materials for the study describing the synthesis and study of metalbased oxygen carriers cu, co, fe, ni and their interaction with supported metal oxides al 2 o 3, ceo 2, tio 2, zro 2 in a chemical looping combustion system. Using chemicallooping with oxygen uncoupling clou for combustion of six different solid fuels.
Exergoeconomic and exergoenvironmental evaluation of. Chemical looping combustion clc is a novel combustion technology with inherent separation of greenhouse. 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. As a team, you will develop a solution to a real design problem. Coal power oxygen transporting membranes otm power cycle 3 rd 23 efficiency gain 5 %points over nccc wmea. Alstoms chemical looping combustion technology with co. Chemical looping combustion with in situ gasefication of solid fuel ash may be elutriated from the fuel reactor recycle gas must be used to fluidized the fuel reactor along with self fluidization due to chemistry recycle gas must burn out the char obrien et al.
Table 1c oxy combustion capture technologies technology generationtrl potential for energy savings applications chemical looping combustion 2 nd 45 efficiency gain 24 %points. Co 2 r te l d k co 2 n hp ip lp r fe 2 o 3 er n r n h 2 o. Chapter 2 is devoted entirely to the performance of particles in chemical looping. Applications of chemicallooping combustion with capture. Quarterly journal of the royal meteorological society 1938, 64 275, 223240. 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.
The key features of the chemical looping processes, their ability to generate a sequestrationready co2 stream, are thoroughly discussed. Chemical looping reforming and gasification wikipedia. 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. Eclair emission free chemical coal combustion process using ilmenite type i 1 mw th the pilot unit is for solid fuel conversion and designed based on cfb concept alstom, u. In clc, the solid oxygen carrier supplies the stoichiometric oxygen needed. These three plants are oxyfuel concepts, thus the combustion process takes place with oxygen. 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. 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. Chemical looping for precombustion co2 capture carnegie. They are major consumers of industry and building energy consumption today. The objective of this paper is to compare the two technologies chemical looping combustion clc for inherent co2capture, and calcium loopingbased. Chemical looping combustion of syngas has been investigated in a pressurized dynamically operated packed bed reactor using ilmenite as oxygen carrier.
The gaseous fuel, typically natural gas, is fed to the fuel. Handbook of chemical looping technology wiley online books. Calcium sulfate chemical looping combustion type i 3 mw th the oxygen carriers are cascaso 4 ohio state university, u. The looping processes can be applied for combustion andor gasification of carbonbased material such as coal, natural gas, petroleum coke, and biomass directly or indirectly for steam, syngas, hydrogen, chemicals, electricity, and liquid fuels production. Box 5, 5600 mb eindhoven, the netherlands abstract chemical looping combustion of syngas has been investigated in a pressurized dynamically operated packed bed reactor using ilmenite as oxygen carrier. Transfer of oxygen between air and fuel takes place with the aid of an oxygencarrier oc. Chemicallooping combustion is one viable solution to co 2 capture. Construction and 100 h of operational experience of a 10kw chemical looping combustor. Chemical looping combustion clc is a new combustion technology with inherent separation of the greenhouse gas co2. Chemical looping systems for fossil energy conversions. Advancements in development of chemicallooping combustion. 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.
The fuel needs to be in a gaseous form and is introduced to the fuel reactor, which contains a metal oxide, meo. Alstoms limestone chemical looping lcl process has the potential to capture cosub 2 from new and existing coalfired power plants while maintaining high plant power generation efficiency. Chemical looping combustion for co2neutral gas facilities. The technique involves the use of a metal oxide as an oxygen carrier which transfers oxygen from the combustion air to the fuel. Experimental demonstration of chemicallooping combustion. Therefore, separation and sequestration of co 2 has become an important topic as well. The system is composed of two reactors, an air and a fuel reactor, as shown in fig. Chemical looping combustion clc is a promising novel. Experimental demonstration of chemicallooping combustion of. Chemical looping combustion, gasification and reforming technology and co2 capture. Department of chemistry, university of iowa, iowa city, iowa 52242. 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.
In the azep, the oxygen is separated in a mixed conducting membrane reactor and it is transferred to the. Chemical looping systems can directly be engaged as an effective means for syngas production. Alstoms chemical looping technology program update 4 june 2014 p 3 chemical looping combustion concept what is it. Packed bed chemical looping 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.
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