Design and experimental investigation of a horizontal rotary reactor for the solar thermal production of lime

Meier, Anton; Bonaldi, Enrico; Cella, G. M.; Lipínski, Wojciech; Wuillemin, Daniel; Palumbo, Robert

doi:10.1016/s0360-5442(03)00187-7

Cited by 150 publications

(55 citation statements)

References 6 publications

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“…This has been confirmed by a recent thermogravimetric analysis study whose results will be summarized in section 3.5 [44]. [45,46], rotary kilns [47,48] and cyclone atmospheric reactors [49]. A potentially cheap and simple option consists of falling particle receivers [50].…”

Section: Description Of the Csp-cal Integrationmentioning

confidence: 72%

Thermochemical energy storage of concentrated solar power by integration of the calcium looping process and a CO2 power cycle

et al. 2016

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Energy storage is the main challenge for a deep penetration of renewable energies into the grid to overcome their intrinsic variability. Thus, the commercial expansion of renewable energy, particularly wind and solar, at large scale depends crucially on the development of cheap, efficient and non-toxic energy storage systems enabling to supply more flexibility to the grid. The Ca-Looping (CaL) process, based upon the reversible carbonation/calcination of CaO, is one of the most promising technologies for thermochemical energy storage (TCES), which offers a high potential for the long-term storage of energy with relatively small storage volume. This manuscript explores the use of the CaL process to store Concentrated Solar Power (CSP). A CSP-CaL integration scheme is proposed mainly characterized by the use of a CO 2 closed loop for the CaL cycle and power production, which provides heat decoupled from the solar source and temperatures well above the ~550ºC limit that poses the use of molten salts currently used to store energy as sensible heat. The proposed CSP-CaL integration leads to high values of plant global efficiency (of around 45-46%) with a storage capacity that allows for long time gaps between load and discharge. Moreover, the use of environmentally benign, abundantly available and cheap raw materials such as natural limestone would mark a milestone on the road towards the industrial competitiveness of CSP.

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Section: Description Of the Csp-cal Integrationmentioning

confidence: 72%

Thermochemical energy storage of concentrated solar power by integration of the calcium looping process and a CO2 power cycle

et al. 2016

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“…Uranium, thorium and REEs can be extracted from the leachate after several additional treatments [83,84]. conducted by Flamant et al [66,67], Licht et al [68], Meier et al [69][70][71][72], as well as Salman and Kraishi [73]. Conveniently, the largest phosphate rock reserves are found in Northern Africa and the Middle East [74,75] where solar radiation is good to excellent.…”

Section: Rare Earth Element Orementioning

confidence: 99%

On the Sustainability and Progress of Energy Neutral Mineral Processing

et al. 2018

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A number of primary ores such as phosphate rock, gold-, copper-and rare earth ores contain considerable amounts of accompanying uranium and other critical materials. Energy neutral mineral processing is the extraction of unconventional uranium during primary ore processing to use it, after enrichment and fuel production, to generate greenhouse gas lean energy in a nuclear reactor. Energy neutrality is reached if the energy produced from the extracted uranium is equal to or larger than the energy required for primary ore processing, uranium extraction, -conversion, -enrichment and -fuel production. This work discusses the sustainability of energy neutral mineral processing and provides an overview of the current progress of a multinational research project on that topic conducted under the umbrella of the International Atomic Energy Agency.

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“…Work on CO 2 reduction during calcination has focused on carbon capture [3][4][5][6][7][8] and using different energy sources, such as concentrated solar power (CSP), which may provide the high temperatures needed for the traditional calcination process. Solar calcination experiments were conducted by Flamant et al [9,10], Licht et al [11], Meier et al [12][13][14][15], as well as Salman and Kraishi [16]. Of particular interest for this study is work by Sceats et al [17] who proposed an externally heated closed coil design of which a cross-section is schematically shown in Figure 1 (top).…”

Section: Introductionmentioning

confidence: 99%

“…Solar calcination experiments were conducted by Flamant et al [9,10], Licht et al [11], Meier et al [12][13][14][15], as well as Salman and Kraishi [16]. Of particular interest for this study is work by Sceats et al [17] who proposed an externally heated closed coil design of which a crosssection is schematically shown in Figure 1 (top).…”

Section: Introductionmentioning

confidence: 99%

“…One calcination unit has a mineral throughput Calcination systems that use CSP-heated HTFs to transfer heat to a mineral feed reach lower calcination temperatures than systems that directly concentrate solar radiation on a small volume of the mineral feed material. The later was for instance achieved by the multitube rotary reactor design from Meier et al [13,15] for the calcination of lime. CSP-systems with HTFs may, however, realize larger mineral throughputs (at lower temperatures) than systems without HTFs, as they can heat larger volumes of the feed material.…”

Section: Introductionmentioning

confidence: 99%

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Stop Smoking—Tube-In-Tube Helical System for Flameless Calcination of Minerals

2017

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Mineral calcination worldwide accounts for some 5-10% of all anthropogenic carbon dioxide (CO 2 ) emissions per year. Roughly half of the CO 2 released results from burning fossil fuels for heat generation, while the other half is a product of the calcination reaction itself. Traditionally, the fuel combustion process and the calcination reaction take place together to enhance heat transfer. Systems have been proposed that separate fuel combustion and calcination to allow for the sequestration of pure CO 2 from the calcination reaction for later storage/use and capture of the combustion gases. This work presents a new tube-in-tube helical system for the calcination of minerals that can use different heat transfer fluids (HTFs), employed or foreseen in concentrated solar power (CSP) plants. The system is labeled 'flameless' since the HTF can be heated by other means than burning fossil fuels. If CSP or high-temperature nuclear reactors are used, direct CO 2 emissions can be divided in half. The technical feasibility of the system has been accessed with a brief parametric study here. The results suggest that the introduced system is technically feasible given the parameters (total heat transfer coefficients, mass-and volume flows, outer tube friction factors, and -Nusselt numbers) that are examined. Further experimental work will be required to better understand the performance of the tube-in-tube helical system for the flameless calcination of minerals.

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Design and experimental investigation of a horizontal rotary reactor for the solar thermal production of lime

Cited by 150 publications

References 6 publications

Thermochemical energy storage of concentrated solar power by integration of the calcium looping process and a CO2 power cycle

Thermochemical energy storage of concentrated solar power by integration of the calcium looping process and a CO2 power cycle

On the Sustainability and Progress of Energy Neutral Mineral Processing

Stop Smoking—Tube-In-Tube Helical System for Flameless Calcination of Minerals

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