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- W2948072684 abstract "Abstract A key for chemical-looping combustion (CLC) is the oxygen carrier. The ultimate test is obviously the actual operation, which reveals if it turns to dust, agglomerates or loses its reactivity or oxygen carrier capacity. The CLC process has been operated in 46 smaller chemical-looping combustors, for a total of more than 11,000 h. The operation involves both manufactured oxygen carriers, with 70% of the total time of operation, and less costly materials, i.e. natural ores or waste materials. Among manufactured materials, the most popular materials are based on NiO with 29% of the operational time, Fe2O3 with 16% and CuO with 13%. Among the monometallic oxides there are also Mn3O4 with 1%, and CoO with 2%. The manufactured materials also include a number of combined oxides with 11% of operation, mostly calcium manganites and other combined manganese oxides. Finally, the natural ores and waste materials include ilmenite, FeTiO3 with 13%, iron ore/waste with 9% and manganese ore with 6%. In the last years a shift towards more focus on CuO, combined oxides and natural ores has been seen. The operational experience shows a large variation in performance depending on pilot design, operational conditions, solids inventory, oxygen carrier and fuel. However, there is at present no experience of the process at commercial or semi-commercial scale, although oxygen-carrier materials have been successfully used in commercial fluidized-bed boilers for Oxygen-Carrier Aided Combustion (OCAC) during more than 12,000 h of operation. The paper discusses strategies for upscaling as well as the use of biomass for negative emissions. A key question is how scaling-up will affect the performance, which again will determine the costs for purification of CO2 through e.g. oxy-polishing. Unfortunately, the conditions in the small-scale pilots do not allow for any safe conclusions with respect to performance in full scale. Nevertheless, the experiences from pilot operation shows that the process works and can be expected to work in the large scale and gives important information, for instance on the usefulness of various oxygen-carriers. Because further research is not likely to improve our understanding of the performance that can be achieved in full scale, there is little sense in waiting with the scale-up. A major difficulty with the scaling-up of a novel process is in the risk. First-of-its-kind large-scale projects include risks of technical mistakes and unforeseen obstacles, leading to added costs or, in the worst case, failure. One way of addressing these risks is to focus on the heart of the process and build it with maximum flexibility for future use. A concept for maximum flexibility is the Multipurpose Dual Fluidized Bed (MDFB). Another is to find a suitable existing plant, e.g. a dual fluidized-bed thermal gasifier. With present emissions the global CO2 budget associated with a maximum temperature of 2 °C may be spent in around 20–25 years, whereas the CO2 budget for 1.5 °C is may be exhausted in 10 years. Thus, the need for both CO2 neutral fuels and negative emissions will become increasingly urgent as we are nearing or transgressing the maximum amount of CO2 that can be emitted without compromising the global climate agreement in Paris saying we must keep “well below” 2 °C and aim for a maximum of 1.5 °C. Thus, biomass may turn out to be a key fuel for Carbon Capture and Storage (CCS), because CO2-free power does not necessarily need CCS, but negative emissions will definitely need Bio-CCS." @default.
- W2948072684 created "2019-06-14" @default.
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- W2948072684 date "2019-09-01" @default.
- W2948072684 modified "2023-10-12" @default.
- W2948072684 title "11,000 h of chemical-looping combustion operation—Where are we and where do we want to go?" @default.
- W2948072684 cites W1094539141 @default.
- W2948072684 cites W1581915606 @default.
- W2948072684 cites W1725037969 @default.
- W2948072684 cites W1938963968 @default.
- W2948072684 cites W1961895502 @default.
- W2948072684 cites W1965459077 @default.
- W2948072684 cites W1968314479 @default.
- W2948072684 cites W1968610997 @default.
- W2948072684 cites W1968737560 @default.
- W2948072684 cites W1971983181 @default.
- W2948072684 cites W1972750094 @default.
- W2948072684 cites W1975700172 @default.
- W2948072684 cites W1978438051 @default.
- W2948072684 cites W1980572350 @default.
- W2948072684 cites W1982504107 @default.
- W2948072684 cites W1984686354 @default.
- W2948072684 cites W1984728490 @default.
- W2948072684 cites W1985510664 @default.
- W2948072684 cites W1985529896 @default.
- W2948072684 cites W1985637566 @default.
- W2948072684 cites W1986713854 @default.
- W2948072684 cites W1990702318 @default.
- W2948072684 cites W1990717936 @default.
- W2948072684 cites W1991551675 @default.
- W2948072684 cites W1991818710 @default.
- W2948072684 cites W1994945076 @default.
- W2948072684 cites W1995162678 @default.
- W2948072684 cites W1996601309 @default.
- W2948072684 cites W1997694150 @default.
- W2948072684 cites W1998705955 @default.
- W2948072684 cites W2000120038 @default.
- W2948072684 cites W2003011548 @default.
- W2948072684 cites W2004809745 @default.
- W2948072684 cites W2004906379 @default.
- W2948072684 cites W2006829200 @default.
- W2948072684 cites W2007347466 @default.
- W2948072684 cites W2007584856 @default.
- W2948072684 cites W2010660836 @default.
- W2948072684 cites W2013614796 @default.
- W2948072684 cites W2014393661 @default.
- W2948072684 cites W2016527711 @default.
- W2948072684 cites W2016739678 @default.
- W2948072684 cites W2017401026 @default.
- W2948072684 cites W2017979598 @default.
- W2948072684 cites W2018251403 @default.
- W2948072684 cites W2018885427 @default.
- W2948072684 cites W2019059502 @default.
- W2948072684 cites W2019655407 @default.
- W2948072684 cites W2020392828 @default.
- W2948072684 cites W2020904785 @default.
- W2948072684 cites W2022277295 @default.
- W2948072684 cites W2022507909 @default.
- W2948072684 cites W2023512931 @default.
- W2948072684 cites W2023684516 @default.
- W2948072684 cites W2023713170 @default.
- W2948072684 cites W2026204383 @default.
- W2948072684 cites W2026369658 @default.
- W2948072684 cites W2027862064 @default.
- W2948072684 cites W2027955118 @default.
- W2948072684 cites W2028747980 @default.
- W2948072684 cites W2028831880 @default.
- W2948072684 cites W2030904566 @default.
- W2948072684 cites W2031464210 @default.
- W2948072684 cites W2031526004 @default.
- W2948072684 cites W2031995694 @default.
- W2948072684 cites W2033332771 @default.
- W2948072684 cites W2033366420 @default.
- W2948072684 cites W2037390868 @default.
- W2948072684 cites W2037505180 @default.
- W2948072684 cites W2037565812 @default.
- W2948072684 cites W2039455471 @default.
- W2948072684 cites W2039582257 @default.
- W2948072684 cites W2040452693 @default.
- W2948072684 cites W2040761814 @default.
- W2948072684 cites W2041117872 @default.
- W2948072684 cites W2042430071 @default.
- W2948072684 cites W2042471620 @default.
- W2948072684 cites W2044571829 @default.
- W2948072684 cites W2048856634 @default.
- W2948072684 cites W2052066594 @default.
- W2948072684 cites W2052132896 @default.
- W2948072684 cites W2055510288 @default.
- W2948072684 cites W2055971568 @default.
- W2948072684 cites W2056542827 @default.
- W2948072684 cites W2058404945 @default.
- W2948072684 cites W2059198378 @default.
- W2948072684 cites W2059277299 @default.