Results of initial operation of the Jupiter Oxygen Corporation oxy- fuel 15 MWth burner test facility

Ochs, Thomas; Oryshchyn, Danylo B.; Woodside, Rigel; Summers, Cathy A.; Patrick, Brian; Gross, Dietrich; Schoenfield, Mark; Weber, Thomas; O’Brien, Dan

doi:10.1016/j.egypro.2009.01.068

Cited by 25 publications

(17 citation statements)

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“…The current work focuses on the production of flame-formed carbon nanoparticles in flames hotter than typical combustion applications. Processes designed for flame temperatures much greater than typical engines include rocket propulsion [6], oxy-fuel combustion [7] and enriched / preheated air applications [8]. A complementary experimental and modeling approach focusing on this temperature range is taken to shed light on distinctive highertemperature (T > 2100 K) soot formation processes.…”

Section: Introductionmentioning

confidence: 99%

Evolution in size and structural order for incipient soot formed at flame temperatures greater than 2100 K

Dasappa

Camacho

2021

Fuel

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Evolution in size and structural order for incipient soot formed at flame temperatures greater than 2100 K Shruthi Dasappa a,b and Joaquin Camacho *a Soot formed in flames hotter than conventional combustion applications is expected to undergo unique formation processes and develop a carbon structure distinct from typical soot. A complementary experimental and modeling approach is reported here to assess flame temperature and equivalence ratio effects for soot formed in the higher-temperature regime (1950 K < Tf < 2250 K). Computations using three separate combustion chemistry models show that predictions of polycyclic aromatic hydrocarbon (PAH) concentration profiles for the highertemperature flames are more sensitive to the choice in mechanism rather than specific flame conditions. As for material properties, the Raman signatures transition from a typical soot spectrum to features observed in disordered sp 2 carbon materials. The defect distance extracted from the Raman bands nearly doubles from values typically reported for soot as the flame temperature exceeds 2200 K. Higher concentrations of gas-phase precursors may facilitate development of an ordered carbon structure as indicated by the relatively high defect distance observed for the highest equivalence ratio series. Particle size distributions measured by mobility sizing show size and yield of soot decreases with increasing flame temperature and the bimodal distribution falls within the ultra-fine range for all flame conditions. This is especially promising if the significant transformation in carbon structure inferred from the evolution in Raman spectra enables development of functional high-surface area sp 2 carbon materials. Namely, the current observations indicate that the flame-formed carbon structure evolves towards high-defect sp 2 carbon with size and carbon structure that can be tuned to some extent.

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Section: Introductionmentioning

confidence: 99%

Evolution in size and structural order for incipient soot formed at flame temperatures greater than 2100 K

Dasappa

Camacho

2021

Fuel

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“…All pilot and demonstration projects in operation are less than 100 MWth in capacity. Most projects focus only on research into the CO2 capture process, such as those in Germany (30 MWth [15]), the USA (15 MWth [16] and 30 MWth [17]), the United Kingdom (40 MWth [18]), France (30 MWth), and Australia (30 MWth [19]). The Callide Oxyfuel project demonstrated that CCS technology can be applied to coal-fired power plants, generating electricity with virtually no emissions, and became the world's first retrofitted industrialscale demonstration of oxy-fuel combustion, which was available to be applied to commercial-scale capture-ready power plants and could be scaled to above 350 MWel [20].…”

Section: Introductionmentioning

confidence: 99%

Techno-economic assessment of coal- or biomass-fired oxy-combustion power plants with supercritical carbon dioxide cycle

Wei

Manović

Hanak

2020

Energy Conversion and Management

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Oxy-fuel combustion is regarded as a feasible technology that can contribute towards decarbonisation of the power industry. Although it has been shown that oxy-fuel combustion results in lower carbon dioxide emissions at a lower cost of carbon dioxide captured compared to the mature amine scrubbing process, its implementation still results in high economic penalties. This study proposes to replace the conventional steam cycle in the state-of-the-art oxy-combustion coal-fired power plants with the supercritical carbon dioxide cycle to reduce both economic and efficiency penalties. In addition, in order to further reduce carbon dioxide emissions, biomass is considered as a replacement fuel for coal in the oxy-fuel combustion power plant and the proposed process becomes a type of bio-energy with carbon capture and storage. The process models were developed in Aspen Plus™ to assess technoeconomic feasibility of the considered processes. The results showed that on replacement of the conventional steam cycle with the supercritical carbon dioxide cycle, the efficiency penalties were reduced by up to 2% points and the levelised cost of electricity was reduced up to 4.6% (4.1 €/MWh). Moreover, when biomass was used as a fuel, the net efficiency penalties increased by 0.5% points and the levelised cost of electricity increased by 24.4 €/MWh. Although techno-economic performance in this case was less favourable under no carbon tax conditions, using biomass resulted in significant negative carbon dioxide emissions (-3.70 megatonnes of carbon dioxide per annum). Such negative emissions can offset carbon dioxide emissions from other sources that are relatively difficult to decarbonise. If the carbon tax is above 24 € per tonne of carbon dioxide, bio-energy with carbon capture and storage became more economically feasible than fossil fuel with carbon capture and storage.

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“…Apart from the effect of fuel type or experimental facility, the combustion condition is a key factor that causes the partitioning difference of the inside and outside deposits , as well as the partitioning fate of arsenic. Oxy-fuel combustion with minimum recycled flue gas, which is also called the second-generation oxy-combustion technology, is thought to be a potential way to reduce the systematic energy penalty caused by the air separation unit (ASU) and compression and purification unit (CPU). − With a higher oxygen concentration in oxidant gas, the flame temperature and heat transfer efficiency are changed as well as the variation of mineral vaporization and ash formation. Numerous studies have been carried out on the formation and particle size distributions (PSDs) of ash aerosols under oxy-combustion conditions, − while only limited literature discussed the formation and growth of ash deposits at an elevated oxygen concentration. ,, With 50% oxygen as inlet gas and the simulated surface temperature hold as 923 K, Zhan et al indicated that the composition of the inside deposits was consistent with the ash aerosol composition of “vaporization mode”.…”

Section: Introductionmentioning

confidence: 99%

Arsenic Partitioning in High-Temperature Ash Deposits during Oxy-fuel Combustion

et al. 2019

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A temperature-controlled ash deposition probe was applied to collect temporally resolved deposit samples in a 100 kW rated down-fired pilot-scale combustor under two atmospheres: (1) air condition and (2) 70% O 2 as inlet gas (named as OXY70). The mineral compositions, particle size distributions, and partitioning of arsenic in the inside and outside deposits were measured. The properties of the ash aerosols were also given to analyze the effect of the atmosphere on arsenic partitioning. Results showed that Ca, Fe, S, and Al were enriched in the inside deposits during coal combustion, while the major contributor to arsenic enrichment in the inside deposits was the interactions between Ca and arsenic. Meanwhile, the smaller particles in the inside deposits also played a positive role in arsenic enrichment as a result of their larger specific surface area and more active cation sites for arsenic adsorption. As the atmosphere changed from air to OXY70 conditions, a remarkable increase of the Ca content in the sub-micrometer particles was observed, which enhanced the enrichment of arsenic in the inside deposits. Meanwhile, larger proportions of aerosol nuclei and arsenic vapor were generated under a higher flame temperature; thus, the arsenic concentrations in the inside and outside deposits were both higher for the OXY70 case. Furthermore, the "nucleation" mode of ash aerosols disappeared as a result of the enhanced association behavior of Fe and aluminosilicate to form super-micrometer particles as well as more Na 2 SO 4 nuclei being scavenged by silicate or composite silicate with larger sizes.

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Results of initial operation of the Jupiter Oxygen Corporation oxy- fuel 15 MWth burner test facility

Cited by 25 publications

References 0 publications

Evolution in size and structural order for incipient soot formed at flame temperatures greater than 2100 K

Evolution in size and structural order for incipient soot formed at flame temperatures greater than 2100 K

Techno-economic assessment of coal- or biomass-fired oxy-combustion power plants with supercritical carbon dioxide cycle

Arsenic Partitioning in High-Temperature Ash Deposits during Oxy-fuel Combustion

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