Examination of oxygen uncoupling behaviour and reactivity towards methane for manganese silicate oxygen carriers in chemical-looping combustion

Jing, Dazheng; Arjmand, Mehdi; Mattisson, Tobias; Rydén, Magnus; Snijkers, Frans; Leion, Henrik; Lyngfelt, Anders

doi:10.1016/j.ijggc.2014.07.003

Cited by 41 publications

(44 citation statements)

References 46 publications

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“…Mattisson [2] and Imtiaz et al [3] have done reviews of CLOU materials. This review included Cu-based [4,5], and mixed oxides based oxygen carriers: Cu-Mn [6,7] , Mn-Fe [8] and Mn-Si [9]. Among the developed materials, one spray dried particles with a 60 wt.% of CuO were analyzed in a CLOU unit of 1.5 kWth where the proof of CLOU concept was demonstrated using different coal ranks and biomass [10][11][12].…”

Section: Introductionmentioning

confidence: 99%

CLOU process performance with a Cu-Mn oxygen carrier in the combustion of different types of coal with CO2 capture

Adánez-Rubio

Abad

Gayán

et al. 2018

Fuel

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The Chemical Looping with Oxygen Uncoupling (CLOU) process is a Chemical Looping Combustion (CLC) technology that allows the combustion of solid fuels with inherent CO2 separation by using oxygen carriers based on metal oxides. This technology has low energy penalty and thus low CO2 capture costs. In CLOU, the oxygen carrier must be able to release gaseous oxygen which limit the availability of metal oxides for this process. In this work, the suitability of oxygen carrier particles containing 34 wt.% CuO and 66 wt.% Mn3O4 (active phase Cu1.5Mn1.5O4) prepared by granulation was investigated in a continuous 1.5 kWth rig during CLOU combustion of different rank coals (two sub-bituminous and a lignite). The effect of the different coals in the combustion and CO2 capture efficiencies at different oxygen carrier to coal ratios was studied. It was found that full combustion can be reached independently of the coal used. However, CO2 capture efficiencies were highly determined by the coal rank. Finally it was found that work with oxygen carrier to coal ratios higher than 4 and the low oxygen carrier conversion both in the fuel and air reactors decreasing the effect of 1 the chemical stress in the attrition rate; therefore it is clearly beneficial for the lifetime of the oxygen carrier particles to operate with low ΔX between fuel and air reactors.

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Section: Introductionmentioning

confidence: 99%

CLOU process performance with a Cu-Mn oxygen carrier in the combustion of different types of coal with CO2 capture

Adánez-Rubio

Abad

Gayán

et al. 2018

Fuel

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“…This indicates that the reactions are different before and after the inflection point. Studying the phase diagram of the Mn‐Si oxide system reveals that the Mn‐Si oxide system has two phase transitions in this temperature range. It is therefore no surprise to see an inflection point when the sample goes from one phase change to another.…”

Section: Resultsmentioning

confidence: 99%

“…The raw ore was heat‐treated in a box furnace at 950 °C for 24 h. Thereafter the ore was crushed and sieved to obtain particles with a size fraction range of 125–180 μm . The manganese silicate oxide particles, M75S, were manufactured by spray‐drying, and then calcined at 1100 °C for 4 h. Particles with diameter of 125–180 μm were used for the experiments . An overview of the composition of the materials can be found in Table 1.…”

Section: Methodsmentioning

confidence: 99%

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Determining CLOU Reaction Kinetics for Combined Oxygen Carriers—Discussing the Experimental Methods

2016

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Combined oxides, primarily manganese based, have shown great potential as oxygen carriers, as they often have oxygen uncoupling properties at relevant temperatures. These oxygen carriers could be a good alternative to copper‐based materials. But in order to scale up or model the chemical‐looping with oxygen uncoupling (CLOU) process reliable oxygen carrier kinetics is needed. The general approach to determine oxygen carrier kinetics is to use thermogravimetric analysis (TGA). However, due to the nature of combined oxygen carriers the conventional approach might not be possible. The objective of this work is to explain and point out the limitations of the conventional way of using TGA for CLOU kinetics. Experiments from three different oxygen carriers, a perovskite, a manganese ore, and a manganese‐silica oxide, are used in order to illustrate the difficulties and spur new thinking in the field.

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“…At this stage, it would be a monumental task to give a precise and all-encompassing overview of all materials tested in the laboratory, but there are a large number of review papers available, e.g. (Abanades et al, 2015, Luo et al, 2015) These papers give a broad view of the different materials which have been investigated for CLC and (Jing et al, 2014. Right figure shows results from continuous experiments in Chalmers 10 kW circulating CLC unit for a series of promising materials based on optimized Ni-and Mn (composition C14, C28) oxygen carriers.…”

Section: Introductionmentioning

confidence: 99%

Chemical-looping technologies using circulating fluidized bed systems: Status of development

Mattisson

Keller

Linderholm

et al. 2018

Fuel Processing Technology

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189

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In chemical-looping combustion (CLC), an oxygen carrier provides lattice oxygen for complete combustion of a fuel for heat and power production. The reduced metal oxide is then oxidized in a separate reactor. The combustion products CO2 and H2O are obtained in pure form, without any nitrogen in the gas. As no gas separation work is needed, this could be a breakthrough technology for carbon capture (CCS). Normally, the fuel-and air-reactor are designed utilizing interconnected fluidized beds. The same underlying reversible redox reactions of CLC can be used for other fuel conversion technologies. These include fluidized bed processes for gas, solid and liquid fuels for heat, power, syngas or hydrogen production. Some of these concepts were suggested as far back as the 1950's, while others have just recently been proposed. Chalmers University of Technology has been involved in CLC research for over 18 years, and this paper will provide a review of some recent developments with respect to CLC with gaseous, liquid and solid fuels. Further, the paper will provide an overview some related technologies where Chalmers is conducting research: i) Chemical-looping gasification (CLG), ii) Chemical-looping reforming (CLR) and iii) Chemical-looping tar reforming (CLTR). In these processes, a pure syngas/hydrogen can be produced effectively, which could be utilized for chemical or fuel production. CHEMICAL-LOOPING COMBUSTION (CLC) Background-As is evident from Fig. 1, the gas stream from the fuel reactor contains a concentrated stream of CO2 and H2O, while the nitrogen from the combustion air is obtained in the air reactor outlet. Possible C28E5−TR1132 (900...950°C) C28E1S2 (975°C) C28 (940°C) C14 (930...950°C) Ni−based (900°C)

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Examination of oxygen uncoupling behaviour and reactivity towards methane for manganese silicate oxygen carriers in chemical-looping combustion

Cited by 41 publications

References 46 publications

CLOU process performance with a Cu-Mn oxygen carrier in the combustion of different types of coal with CO2 capture

CLOU process performance with a Cu-Mn oxygen carrier in the combustion of different types of coal with CO2 capture

Determining CLOU Reaction Kinetics for Combined Oxygen Carriers—Discussing the Experimental Methods

Chemical-looping technologies using circulating fluidized bed systems: Status of development

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