Next Scale Chemical Looping Combustion: process Integration and Part Load Investigations for a 10MW Demonstration Unit

Marx, Klemens; Bertsch, Otmar; Pröll, Tobias; Hofbauer, Hermann

doi:10.1016/j.egypro.2013.05.151

Cited by 19 publications

(11 citation statements)

References 4 publications

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“…In addition, the air reactor in CLC is operated at relatively low temperatures using flameless “combustion” of the reduced oxygen carriers, which leads to significantly reduced NO x production, thereby eliminating the need for selective catalytic reduction (SCR). These distinct advantages offered by CLC have spurred extensive research and development activities over the past two decades, both in terms of oxygen carrier development and process scale up and demonstration …”

Section: Introductionmentioning

confidence: 99%

Oxidative Dehydrogenation of Ethane: A Chemical Looping Approach

et al. 2016

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The current study investigates a chemical‐looping‐based oxidative dehydrogenation (CL‐ODH) concept for ethane‐to‐ethylene conversion. In this cyclic redox scheme, an oxide‐based redox catalyst is used to selectively combust hydrogen from ethane dehydrogenation. As the hydrogen product limits ethane conversion, in situ oxidation of hydrogen enhances the ethane conversion and ethylene yield. Moreover, heat required in ODH is compensated by re‐oxidation of the oxygen‐deprived redox catalyst, enabling auto‐thermal operation for the overall process. Compared to steam cracking, CL‐ODH can potentially achieve higher efficiency with lower CO2 and NOx emissions. Silica and magnesia‐supported manganese oxides are investigated. It is determined that unpromoted Mn/SiO2 and Mn/MgO redox catalysts exhibit low selectivity towards ethylene. The addition of promoters such as sodium and tungsten renders effective redox catalysts with satisfactory activity, selectivity, oxygen carrying capacity, and redox stability.

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Section: Introductionmentioning

confidence: 99%

Oxidative Dehydrogenation of Ethane: A Chemical Looping Approach

et al. 2016

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“…A low‐pressure support steam generator unit is placed at the cold end of the exhaust‐gas pathway of the air reactor for production of low‐pressure steam for loop‐seal fluidization (1 bar gauge). The exact amount of fluidization steam would usually be determined in cold‐flow model experiments; therefore, a fluidization steam flow of 50 t h −1 is assumed that is similar to the fluidization steam demand in earlier scaleup studies on DCFB–CLC units . Steam parameters at high‐pressure turbine inlet are 160 bar and 580 °C and again 50 bar/580 °C at the IP turbine inlet.…”

Section: Resultsmentioning

confidence: 99%

“…Thee xact amounto ff luidizations team would usuallyb ed etermined in cold-flow modele xperiments;t herefore,afluidization steamf low of 50 th À1 is assumed that is similar to the fluidizationsteamdemandi nearlier scaleup studies on DCFB-CLCu nits. [30] Steam parameters at high-pressure turbine inlet are 160 bar and 580 8Ca nd again 50 bar/580 8Ca tt he IP turbine inlet. Thet emperatureload profile of Case 1i sd epicted in Figure 1.…”

Section: Resultsmentioning

confidence: 99%

Concept Study for Competitive Power Generation from Chemical Looping Combustion of Natural Gas

Zerobin

Bertsch²,

Penthor

et al. 2016

Energy Tech

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Chemical looping combustion (CLC) offers the possibility for efficient fuel conversion with inherent CO2 capture and is expected to significantly reduce the energy penalty associated with CO2 capture processes. Feasibility of the concept has been shown and studied thoroughly in lab experiments whereas the potential for power generation on a large scale will depend on the process configuration. Two different scenarios for competitive power generation from atmospheric pressure CLC of natural gas have been assessed in this study using process simulation. Process design is shown and discussed based on net electric efficiencies.

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“…This study assumed that water was entering at 600 psia and 15.6°C, and exited as steam at the same pressure and 307.8°C. The pressure and temperature chosen to simulate in this case are similar to those chosen by Marx et al (2013) for their process integration study, and to those employed in an Industrial Carbon Management Initiative (ICMI) report for process design of a CLC system for natural gas (ICMI Report, 2012). Figure 3 represents the heat exchanger network (HEN) diagram for the 10 MW th CLC process unit, with details on the steam heat exchangers outlined in Table 3.…”

Section: Resultsmentioning

confidence: 99%

An investigation of steam production in chemical-looping combustion (CLC) and chemical-looping with oxygen uncoupling (CLOU) for solid fuels

Dansie

Sahir

Hamilton

et al. 2015

Chemical Engineering Research and Design

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Chemical-looping combustion (CLC) and chemical-looping with oxygen uncoupling (CLOU) are being actively explored as solid fuel combustion technologies that have the potential to facilitate CO 2 capture. While CLC and CLOU have similarities operationally, there are some key differences. In particular, the CLC process requires a coal gasification step where coal is first broken down into a syngas with the use of steam or CO 2. The resulting syngas is then oxidized with the metal oxide to release energy. In the CLOU process the metal oxide releases oxygen that combusts the solid fuel, resulting in a lower residence time, as the coal gasification reactions are avoided. The CLC and CLOU systems were modeled with ASPEN Plus at a 10 MW th scale, and the process streams were analyzed by ASPEN Energy Analyzer to determine the amount of industrial process steam that could be generated from CLC or CLOU. Both the air and fuel reactor were analyzed as two circulating fluidized beds, with metal oxide circulating between the two reactors. The air reactor, where metal oxide is oxidized, was fluidized with air. The fuel reactor, where the metal oxide is reduced, was fluidized with steam for CLC and recirculated CO 2 for CLOU. It was identified that the CLOU process had the potential to produce more steam, approximately 7920 kg/hr, as compared to CLC (6910 kg/hr).

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Next Scale Chemical Looping Combustion: process Integration and Part Load Investigations for a 10MW Demonstration Unit

Cited by 19 publications

References 4 publications

Oxidative Dehydrogenation of Ethane: A Chemical Looping Approach

Oxidative Dehydrogenation of Ethane: A Chemical Looping Approach

Concept Study for Competitive Power Generation from Chemical Looping Combustion of Natural Gas

An investigation of steam production in chemical-looping combustion (CLC) and chemical-looping with oxygen uncoupling (CLOU) for solid fuels

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