WorldCat Identities

Lyngfelt, Anders

Overview
Works: 26 works in 31 publications in 2 languages and 37 library holdings
Roles: Author, Editor
Publication Timeline
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Most widely held works by Anders Lyngfelt
Abatement of SO₂ emissions from fluidised bed boilers : the effect of reducing conditions by Anders Lyngfelt( Book )

5 editions published in 1988 in English and held by 10 WorldCat member libraries worldwide

Improving the knowledge of carbon storage and coal bed methane production by 'in situ' underground tests (Carbolab) : final report( )

1 edition published in 2014 in English and held by 2 WorldCat member libraries worldwide

Carbolab was an RFCS 4-year project aimed at gathering and analysing effects of CO2 injection in coal at a panel scale in an existing underground coal mine in the north of Spain. To achieve this goal, it was necessary to carry out many tasks to adapt and prepare the gallery. Additionally, we collected all the available information in relation to geology, geophysics, geomechanics and hydrogeology which allowed us to select the target coal seam. Anyway, there was a lack of information in relation to many aspects, which forced us to carry out additional studies in the zone. Almost 30 boreholes were sunk to characterise and monitor the area and to inject CO2. The injection itself lasted 2 months, being impossible to continue longer because of a break in the injection borehole casing. Concerning geophysical monitoring, we used seismic tomography, radar, microgravimetry, induced polarisation, spontaneous potential, resistivity and microseismicity. Only the last two methods showed a variation with CO2 injection. We also made a complete geochemistry monitoring, observing change of gas concentrations in coal and surrounding rocks, pH decrease, rise of conductivity and alkalinity, increase in Ca and Mg concentrations as well as a rise of CO2 dissolved values. In addition, we monitored a CO2 leak close to the injection borehole head that represented approximately 30 % of the CO2 injected. In parallel, we developed a model using TOUGH2 and another tool based on COMSOL Multiphysics software. Also, a detailed study was made to assess longterm safety
Avoiding CO2 capture effort and cost for negative CO2 emissions using industrial waste in chemical-looping combustion/gasification of biomass by Patrick Moldenhauer( )

1 edition published in 2019 in English and held by 2 WorldCat member libraries worldwide

Chemical-looping combustion (CLC) is a combustion process with inherent separation of carbon dioxide (CO2), which is achieved by oxidizing the fuel with a solid oxygen carrier rather than with air. As fuel and combustion air are never mixed, no gas separation is necessary and, consequently, there is no direct cost or energy penalty for the separation of gases. The most common form of design of chemical-looping combustion systems uses circulating fluidized beds, which is an established and widely spread technology. Experiments were conducted in two different laboratory-scale CLC reactors with continuous fuel feeding and nominal fuel inputs of 300 Wth and 10 kWth, respectively. As an oxygen carrier material, ground steel converter slag from the LinzDonawitz process was used. This material is the second largest flow in an integrated steel mill and it is available in huge quantities, for which there is currently limited demand. Steel converter slag consists mainly of oxides of calcium (Ca), magnesium (Mg), iron (Fe), silicon (Si), and manganese (Mn). In the 300 W unit, chemical-looping combustion experiments were conducted with model fuels syngas (50 vol% hydrogen (H2) in carbon monoxide (CO)) and methane (CH4) at varied reactor temperature, fuel input, and oxygen-carrier circulation. Further, the ability of the oxygen-carrier material to release oxygen to the gas phase was investigated. In the 10 kW unit, the fuels used for combustion tests were steam-exploded pellets and wood char. The purpose of these experiments was to study more realistic biomass fuels and to assess the lifetime of the slag when employed as oxygen carrier. In addition, chemical-looping gasification was investigated in the 10 kW unit using both steam-exploded pellets and regular wood pellets as fuels. In the 300 W unit, up to 99.9% of syngas conversion was achieved at 280 kg/MWth and 900 °C, while the highest conversion achieved with methane was 60% at 280 kg/MWth and 950 °C. The materials ability to release oxygen to the gas phase, i.e., CLOU property, was developed during the initial hours with fuel operation and the activated material released 12 vol% of O2 into a flow of argon between 850 and 950 °C. The materials initial low density decreased somewhat during CLC operation. In the 10 kW, CO2 yields of 7582% were achieved with all three fuels tested in CLC conditions, while carbon leakage was very low in most cases, i.e., below 1%. With wood char as fuel, at a fuel input of 1.8 kWth, a CO2 yield of 92% could be achieved. The carbon fraction of C2-species was usually below 2.5% and no C3-species were detected. During chemical-looping gasification investigation a raw gas was produced that contained mostly H2. The oxygen carrier lifetime was estimated to be about 110170 h. However, due to its high availability and potentially low cost, this type of slag could be suitable for large-scale operation. The study also includes a discussion on the potential advantages of this technology over other technologies available for Bio-Energy Carbon Capture and Storage, BECCS. Furthermore, the paper calls for the use of adequate policy instruments to foster the development of this kind of technologies, with great potential for cost reduction but presently without commercial application because of lack of incentives
Kompendium i energiteknik by Bo Leckner( Book )

1 edition published in 1984 in Swedish and held by 1 WorldCat member library worldwide

Våtoxidation : en metod att omvandla till nyttig energi by Anders Lyngfelt( Book )

1 edition published in 1982 in Swedish and held by 1 WorldCat member library worldwide

En termodynamisk analys av en våtoxidationsprocess för kraftproduktion by Anders Lyngfelt( Book )

1 edition published in 1982 in Swedish and held by 1 WorldCat member library worldwide

En kraftprocess för våt torv med återvinning av bränslefuktens ångbildningsvärme by Pär Stenberg( Book )

1 edition published in 1985 in Swedish and held by 1 WorldCat member library worldwide

Proceedings of second Nordic Minisymposium on Carbon Dioxide Capture and Storage, October 26, Gothenburg 2001 by Nordic Minisymposium on Carbon Dioxide Capture and Storage( Book )

1 edition published in 2002 in English and held by 1 WorldCat member library worldwide

Sulphur capture in a 16 MW fluidised bed boiler - decomposition of CaSO₄ at high temperatures by Anders Lyngfelt( Book )

1 edition published in 1988 in English and held by 1 WorldCat member library worldwide

Chemical looping combustion of four different solid fuels using a manganese-silicon-titanium oxygen carrier( )

1 edition published in 2018 in English and held by 1 WorldCat member library worldwide

Highlights: A combined oxide of manganese, silicon and titanium was used as oxygen carrier in chemical looping combustion with four different solid fuels. The oxygen carrier performed well in the process. No signs of agglomeration were detected. Fines production was very low, indicating a high lifetime. The oxygen demand, which was as low as 2.2% for wood char, correlated with the fuel's volatile content. The minimum oxygen demand approached zero in certain conditions. Abstract: In chemical looping combustion, solid metal oxide particles are utilized to transport oxygen from the air reactor to the fuel reactor. As fuel and air are never mixed, the energy penalty typically associated with gas separation in first-generation carbon capture and storage technologies can be avoided. To be considered as oxygen carrier for this process, a material should be reactive at relevant conditions, environmentally friendly, non-toxic, mechanically durable and have potential to be produced at low cost in large scale. Combined oxides of manganese and silicon have previously shown promise to meet these requirements. In this study, a spray-dried oxygen carrier based on a combined oxide of manganese, silicon and titanium was examined with respect to its performance in continuous chemical looping combustion of solid fuels. The experiments were carried out in a 10kW chemical looping pilot unit which uses interconnected fluidized beds for oxygen carrier cycling. Prior to these experiments, the attrition rate was determined in a jet-cup rig. As the particles were comparably small and light, elutriation from the air reactor was high. The fuels used during a total experimental duration of 32h were wood char, devolatilized hard coal, pet coke and lignite. In addition to varying fuels, the influence of fuel power, solids circulation and fuel reactor temperature were investigated. Gas conversion performance correlated clearly with the volatile content of the fuels, peaking at 97.8% for wood char and 94.6% for pet coke, which is the highest value ever reached for this particular fuel in this unit. Higher temperatures and solids circulation rates increased gas conversion. No decrease in performance over time, in particular no loss of reactivity due to sulphur accumulation, could be detected. The oxygen carrier released gaseous oxygen at relevant conditions. The particles were easily fluidized and fines production was low, suggesting a sufficient lifetime for the purpose
Manganese ores as oxygen carriers for chemical-looping combustion (CLC) and chemical-looping with oxygen uncoupling (CLOU)( )

1 edition published in 2017 in English and held by 1 WorldCat member library worldwide

Enhanced performance of manganese ore as oxygen carrier for chemical-looping with oxygen uncoupling (CLOU) by combination with Ca(OH)2 through spray-drying( )

1 edition published in 2016 in English and held by 1 WorldCat member library worldwide

Abstract: Chemical-looping with oxygen uncoupling (CLOU) is an innovative combustion technology with inherent capture of the CO2 and potential to drastically reduce the cost of capture. The process requires two interconnected reactors, between which the oxygen carrier particles are circulated while carrying oxygen from the combustion air to the fuel. In this work, the reactivity and mechanical stability of five materials were studied; three natural ores and two materials which were combinations of an ore and Ca(OH)2 . The overall aim was to investigate the feasibility of making a reactive and mechanically stable material using cheap raw materials and an industrially relevant particle manufacturing process. The two combined materials behaved differently from their natural counterparts. The Brazilian ore + Ca(OH)2 showed a decrease in reactivity towards methane, but higher reactivity towards syngas in comparison to the pure ore. The South African ore + Ca(OH)2 showed a major improvement in reactivity towards both syngas and methane, which could be attributed to formation of a perovskite-structure material with significant CLOU properties. A comparison between the pure ores and the combined materials show that the addition of Ca(OH)2 had generally a beneficial impact on the mechanical stability of the oxygen carriers. As a significant change in the particle size distribution was seen for all oxygen carrier materials after repeated redox cycles with long reduction periods, the particle disintegration was likely caused by the chemical phase transformations occurring inside the particles, rather than by mechanical forces
Erfarenheter av våtoxidation för höga temperaturer och tryck by Anders Lyngfelt( Book )

1 edition published in 1982 in Swedish and held by 1 WorldCat member library worldwide

Estimating the solids circulation rate in a 100-kW chemical looping combustor( )

1 edition published in 2017 in English and held by 1 WorldCat member library worldwide

Highlights: Experiments with a novel oxygen carrier were conducted by adding batches of fuel. The O2 dip in the AR that followed after each fuel batch could be used to model circulation. By making several batch experiments at varying circulation, a general model was obtained. The circulation correlated strongly to the internal mass flow in the AR riser. The internal mass flow in the AR riser could be used to calculate the solids circulation. Abstract: Chemical looping combustion (CLC) is a technology of CO2 capture that can drastically reduce its cost. The solids circulation inside a 100-kW chemical looping combustor was investigated using a novel oxygen carrier called Sinaus by adding fuel batches to the fuel reactor. The decline and subsequent rise of oxygen concentration in the air reactor after each addition was used to determine the residence time of solids in the fuel reactor and adjacent vessels. The obtained residence time, in combination with the solids inventory, determined the solids circulation for a particular batch experiment. After performing a number of such experiments, the above circulation was correlated with other experimental data, revealing a good correlation between the solids flow at the top of the air reactor riser and the actual circulation obtained using batch tests. The relationship between global circulation, m ̇, and the mass flow in the air reactor riser, m ̇ riser, was found to be linear within the investigated interval, being described as m ̇ = 6.6 + 0.057 m ̇ riser . Although this correlation was valid only for the investigated reactor system, the approach used to obtain the solids circulation could be used to derive a similar correlation for any dual fluidized bed system
Tre gasturbinprocesser för våt torv by Pär Stenberg( Book )

1 edition published in 1985 in Swedish and held by 1 WorldCat member library worldwide

Emission-free chemical looping coal combustion process (Eclair) final report( )

1 edition published in 2014 in English and held by 1 WorldCat member library worldwide

Chemical looping utilising metal oxide carrier has emerged as one of the very promising technologies with the potential to capture CO2 while maintaining high plant power generation efficiency. After validation of chemical looping for solid fuels at 10 kWth scale, the Éclair programme represents an important step in the development of the technology. The major goal of the programme is to address the key issues identified: Down selection of the best oxygen carrier material; Design and operation of upscaled test rigs: highly flexible rig (100 kWth) and full prototype (1 MWth); Upscaled product study. Potential alternative oxygen carriers have been evaluated. Some interesting options have been found but these need further studies and development to improve characteristics to fulfil requirements of industrial chemical looping unit. Significant operational experience has been successfully carried out in 0.5 to 10 kWth units. A 100 kWth rig has been successfully operated in stable conditions with different fuels and ilmenite as oxygen carrier. A 1 MWth prototype has been erected and operated for several weeks. Update of the concept for a 455 MWe CLC power plant has confirmed that chemical looping is well positioned compared to other technologies. In conclusion, the project has given a very substantial addition to the state of art when it comes to chemical-looping combustion of solid fuels. The results clearly indicate the viability of the CLC for solid fuel technology, which has the potential for high reduction of energy penalties and costs of CO2 capture
Chemical-looping combustion in a 100-kW unit using a mixture of ilmenite and manganese ore as oxygen carrier( )

1 edition published in 2016 in English and held by 1 WorldCat member library worldwide

Abstract: Chemical-looping combustion (CLC) is a novel carbon-capture technology with potential to drastically reduce the cost of CO2 capture. Relying on interconnected fluidized bed technology, CLC systems can achieve CO2 capture by using oxygen carrying bed material. This so-called oxygen carrier transports oxygen from combustion air to fuel, thus making carbon capture inherent to the CLC process. In this study, we present findings from a 100 kW chemical-looping combustor for solid fuels. The 100 kW unit uses the dual-CFB concept, where both air reactor and fuel reactor are designed as circulating fluidized beds. The oxygen carrier material used in this study consisted of a mixture of ilmenite - which has been used in several studies in CLC - and a manganese ore. Previous studies have shown that gas conversion can be significantly increased by using manganese ore particles as oxygen carrier. However, previous testing has also shown that the production of fines, i.e . particle attrition, may be high when using manganese ore. The reason for mixing the two materials is thus to obtain an oxygen carrying material that has high reactivity, and yet does not produce too much fines during fuel operation. The 100 kW unit was operated in total for 18 h with fuel. Three fuels were used in the experiments: two bituminous coals and wood char. Gas conversion was high, and increased with increasing fraction of manganese ore in the oxygen-carrier mixture. At the end of the experiments, the fraction of manganese ore in the bed material was approximately 8%, which also was the highest fraction during all tests. The mixture of ilmenite and manganese ore gave significant improvements in gas conversion in comparison to only ilmenite. The highest gas conversion observed during testing with bituminous coal was 91.5%, as compared to 84% with only ilmenite as oxygen carrier during similar conditions in the 100 kW unit. These test results indicate that the addition of manganese ore could almost halve the fraction of unconverted gas. Thus, mixing mechanically stable ilmenite with more reactive manganese ore can give reductions in costs as compared to using manganese ore only, and still give significantly reduced oxygen demand as compared to ilmenite. In the present case - mixing of ilmenite and manganese ore - the high reactivity was also possible to combine with improved operability of the material, primarily manifested as lower production rate of fines
Synthesis and upscaling of perovskite Mn-based oxygen carrier by industrial spray drying route( )

1 edition published in 2018 in English and held by 1 WorldCat member library worldwide

Highlights: Perovskite Mn-based oxygen carriers for CLC are manufactured by spray drying. The effect of commercial raw Mn oxides as Mn source is investigated. Particles with strength of 2.8N and 0.94 methane conversion at 950°C were obtained. Production method of particles at lab-scale is transferred to industrial scale. Particles with good mechanical strength and reactivity were produced at tonne scale. Abstract: Chemical looping combustion (CLC) has inherent separation of the greenhouse gas CO2 by avoiding direct contact between air and fuel. The transfer of oxygen is realised by metal oxide particles that continuously circulate between the air and fuel reactors. Promising particles are perovskite Mn-based oxygen carrier materials, which have proven their performance at lab-scale. To test these particles at an industrial scale, it is necessary to use more raw materials that are widely and cheaply available in bulk quantities. The development of these Mn-based oxygen carriers by the spray drying method was investigated in this study. Furthermore, the production method is transferred to industrial scale so that several tonnes of oxygen carriers could be produced. The characterization and the performance of these particles at lab and industrial scale is discussed. Different Mn ores and oxides were selected to study the effect of the used Mn source on the oxygen carrier performance. Particles suitable for chemical looping were made based on diverse Mn sources with different Mn oxidation states. The performance of the oxygen carrier was found to be heavily impacted by impurities in the raw materials. The best performing Mn oxide was selected for up-scaling and each step of the spray drying process was optimized at large scale. The thermal treatment of the particles at tonne scale remains a challenge, but particles with a good mechanical strength, sphericity and sufficient reactivity for methane were manufactured
The EU-FP7 Project SUCCESS - Scale-up of Oxygen Carrier for Chemical Looping Combustion using Environmentally Sustainable Materials( )

1 edition published in 2017 in English and held by 1 WorldCat member library worldwide

Abstract: The paper gives a high level overview of the work performed in the EU-FP7 funded project SUCCESS (Scale-up of oxygen carrier for chemical looping combustion using environmentally sustainable materials). The project is the most recent one in a series of successful EU-funded research projects on the chemical looping combustion (CLC) technology. Its main objective is to perform the necessary research in order to demonstrate the CLC technology in the range of 10MW fuel power input. The main focus is on scale-up of production of two different oxygen carrier materials using large scale equipment and industrially available raw materials. This will guarantee availability of oxygen carrier material at tonne scale. The scale-up of the two materials, a Cu and a Mn based, was successful and first tests with the Cu material have already been performed in four different pilot units up to 150kW where the material showed excellent performance regarding fuel conversion. In addition to technology scale-up, extensive end-user evaluation is performed. This evaluation includes investigations on health, security and environmental impacts (HSE), a life cycle analysis and a techno-economic analysis to compare the CLC technology for steam generation against the current state-of-the-art technologies
 
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