Potential and limitations of power generation via chemical looping combustion of gaseous fuels

Zerobin, Florian; Pröll, Tobias

doi:10.1016/j.ijggc.2017.07.011

Cited by 33 publications

(14 citation statements)

References 12 publications

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“…However, energy efficiency falls to 44% when the CLC unit is operated at 900ºC, which is similar to the efficiency of a CLC unit at atmospheric pressure [17].…”

Section: Process Modelssupporting

confidence: 57%

“…With respect to the power cycle when burning gaseous fuels, in order to achieve competitive energy efficiencies, it is necessary to operate at high temperatures and high pressures (1-3 MPa) [17]. There are some concerns regarding operation of pressurized interconnected fluidized beds owing to the difficulties in preventing solids entrainment to the gas turbine found with pressurized fluidized-bed combustion boilers.…”

mentioning

confidence: 99%

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Chemical-looping combustion: Status and research needs

Adánez

Abad

2019

Proceedings of the Combustion Institute

174

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Chemical-Looping Combustion (CLC) has emerged in recent years as a very promising combustion technology for power plants and industrial applications with inherent CO 2 capture, which circumvent the energy penalty imposed on other competing technologies. The process is based on the use of a metal oxide to transport the oxygen needed for combustion in order to prevent direct contact between the fuel and air. CLC is performed in two interconnected reactors, and the CO 2 separation inherent to the process practically eliminates the energy penalty associated with gas separation. The CLC process was initially developed for gaseous fuels, and its application was subsequently extended to solid fuels. The process has been demonstrated in units of different size, from bench scale to MW-scale pilot plants, burning natural gas, syngas, coal and biomass, and using ores and synthetic materials as oxygen-carriers. An overview of the status of the process, starting with the fundamentals and considering the main experimental results and characteristics of process performance, is made both for gaseous and solid fuels. Process modelling of the system for solid and gaseous fuels is also analysed. The main research needs and challenges both for gaseous and solid fuel are highlighted.

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“…However, energy efficiency falls to 44% when the CLC unit is operated at 900ºC, which is similar to the efficiency of a CLC unit at atmospheric pressure [17].…”

Section: Process Modelssupporting

confidence: 57%

mentioning

confidence: 99%

Chemical-looping combustion: Status and research needs

Adánez

Abad

2019

Proceedings of the Combustion Institute

174

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“…have a significant influence on the net electrical efficiency. [17] Out of these parameters, the TIT is known to have a greater influence on net electrical efficiency. [28] As mentioned earlier, in typical CLC systems, the TIT is limited by the reactor temperature, which is maintained between 800 and 1200 C. [29] This reactor temperature corresponds to the combustor outlet temperature (COT) in GTs.…”

Section: Introductionmentioning

confidence: 99%

“…Zerobin and Pröll developed a process model of a pressurized CLC system and compared the performance with a simple gas turbine combined cycle (GTCC) plant consisting of a single‐pressure HRSG. The objective of the study was to identify the limitations of HP CLC systems utilizing gaseous fuels.…”

Section: Introductionmentioning

confidence: 99%

Efficiency Improvement of Chemical Looping Combustion Combined Cycle Power Plants

2019

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Chemical‐looping combustion (CLC) is an innovative technology for power production with inherent carbon dioxide (CO2) capture. Even though CLC imposes no direct energy penalty for CO2 capture, previous works have shown significant energy penalties relative to natural gas (NG) combined cycle plants. This is due to the relatively low turbine inlet temperature (TIT), which is limited by the oxygen carrier used in the CLC process. Therefore, herein, an additional combustor (COMB) is included downstream of the CLC unit to raise the TIT (dependent on the CLC/COMB outlet temperature [COT] and the blade cooling). When NG is used in the additional COMB, the energy penalty is only 2.9% points with 72% CO2 capture. Achieving higher CO2 capture requires the use of H2 fuel in the COMB. The efficiency of the H2 production process plays an important role. For conventional H2 production with post‐combustion CO2 capture, the added COMB brings no improvement and the energy penalty is 8.8% points. For an advanced H2 production process (90% efficiency), the energy penalty reduces to 4.5% points with 100% CO2 capture. The results show the potential of CLC‐combined cycle power plants with an additional COMB to minimize the energy penalty of CO2 capture.

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“…The use of a combined cycle, including steam and gas turbines, must be considered in order for the process to be competitive compared to a commercial natural gas combined cycle plant [92]. A pressurized CLC unit must be designed in order to supply hot and pressurized depleted air to the gas turbine.…”

Section: Integration and Dynamic Analysismentioning

confidence: 99%

Negative CO2 emissions through the use of biofuels in chemical looping technology: A review

et al. 2018

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In order to limit the increase in the global average temperature to 2 °C or below, the Paris Agreement proposed the reduction of CO 2 emissions throughout this century. Bioenergy with CO 2 capture and storage (BECCS) technologies represent an interesting option in order to allow this goal to be metgoal, because they are able to achieve negative CO 2 emissions. Chemical looping (CL) is recognized as one of the most innovative CO 2 capture technologies owing to its low energy penalty. CL processes permit the utilization of renewable fuels in a nitrogen-free atmosphere, given that the required oxygen is supplied by solid oxygen carriers. The present work presents an overview of the status of development of the use of biofuels in chemical looping technologies, including chemical looping combustion (CLC) and chemical looping with oxygen uncoupling (CLOU) for the production of heat/electricity, as well as chemical looping reforming (CLR), chemical looping gasification (CLG) and chemical looping coupled with water splitting (CLWS) for syngas/H 2 generation. The main milestones in the development of such processes are shown, and the future trends and opportunities for CL technology with biofuels are discussed.

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Potential and limitations of power generation via chemical looping combustion of gaseous fuels

Cited by 33 publications

References 12 publications

Chemical-looping combustion: Status and research needs

Chemical-looping combustion: Status and research needs

Efficiency Improvement of Chemical Looping Combustion Combined Cycle Power Plants

Negative CO2 emissions through the use of biofuels in chemical looping technology: A review

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