Impurity effects on the oxy-coal combustion power generation system

Kim, Sungeun; Ahn, Hye‐Jin; Choi, Sangmin; Kim, Tae-Hyung

doi:10.1016/j.ijggc.2012.09.002

Cited by 11 publications

(5 citation statements)

References 15 publications

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“…The conversion of N and S in the pyrolysis stage has an important influence on NOx/SOx emission and the operation safety of CPU system [18,19]. CO2 is a reactant in the char gasification reaction, as well as one of the final product of coal pyrolysis, so the existence of high partial pressures of CO2 affects the yield of volatile and N/S conversion significantly.…”

Section: Introductionmentioning

confidence: 99%

Nitrogen and sulfur conversion during pressurized pyrolysis under CO 2 atmosphere in fluidized bed

Duan

Anthony

et al. 2017

Fuel

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Pressurized oxy-fuel combustion (POFC) is a promising technology for CO2 capture from coal-fired power plants, offering both high efficiency and a low penalty. However, the high partial pressure of CO2 in a POFC furnace has important impacts on fuel-N and fuelS conversion during the coal pyrolysis process, and understanding this will help to achieve further control of SOx/NOx. In this study, coal pyrolysis experiments were conducted in a pressurized fluidized bed with the pressure range of 0.1-0.7MPa under N2 and CO2 atmosphere. The gaseous products were monitored by a Fourier transform infrared spectroscopy analyzer (FTIR) and the char residue was characterized by an X-ray photoelectron spectroscopy (XPS) analyzer in order to acquire the species information for S-containing and N-containing compounds. Results show that the enrichment of CO2 in the local atmosphere enhances the fuel-N conversion to HCN in the pyrolysis process, which serves as a favorable precursor to N2O. The generation of HCN and NH3 increase simultaneously with the increase of overall pressure. SO2 concentration in the gaseous product is relatively low, and as the pressure increases, the concentration decreases slightly due to CO reduction of SO2 to COS. Sulfur content in the char decreases as the pressure goes from 0.1MPa to 0.7MPa indicating higher CO2 pressure accelerates the decomposition of sulfur compounds in the coal, which is further confirmed by the XPS results.

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Section: Introductionmentioning

confidence: 99%

Nitrogen and sulfur conversion during pressurized pyrolysis under CO 2 atmosphere in fluidized bed

Duan

Anthony

et al. 2017

Fuel

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“…To tackle the problem of global warming, many countries have begun to develop technologies to reduce emission of carbon dioxide. Integrated gasification combined cycle (IGCC) with carbon capture and sequestration (CCS) is a common type of power generation system used to efficiently reduce CO 2 emissions, and different CO 2 emission reducing technologies such as physical absorption, membrane reactors, chemical looping, oxy-fuel combustion and other related technologies have been investigated. − However, in capturing CO 2 , there is a cost of 7–13% in terms of thermal energy penalty and a 20–30% increase in investment cost. , The high-cost of CO 2 capture stems from the considerable amount of energy required in the separation process and extra equipment investment, so it is of great significance to achieve reconciliation of the reduction of CO 2 emissions and improvement of thermal efficiency.…”

Section: Introductionmentioning

confidence: 99%

CO₂ Capture and Use in a Novel Coal-Based Polygeneration System

Fan

2013

Ind. Eng. Chem. Res.

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A novel coal-based polygeneration system with CO2 recycling for CO2 capture is proposed. Two CO2 recycling schemes exist in this system. In the first, CO2 is recycled into the gasifier as the gasifying agent. In the second, CO2 is recycled into the gas turbine as a diluent. Compared with conventional CCS systems, this new system avoids the use of water gas shift and CO2 separation processes to capture CO2, and, more importantly, a part of CO2 can be converted into CO in coal gasification and be used to synthesize chemicals, improving carbon element utilization and chemical output. By means of exergy analysis, comparison with four conventional single production systems shows that the proposed system provides more than 11% in energy savings and more than 25% in capital investment saving. The exergy efficiency, CO2 emission, and internal rate of return may be expected to reach 46.3%, 0.47 t·(t-coal)−1 and 14.76%, respectively.

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“…(1) [10] .Oksi yanma sistemlerinde elde edilen baca gazında kuru bazda %80-98 arasında değişen CO2 konsantrasyon elde edilebilir [7]. Oksi yanma prosesinin avantajları şöyle sıralanabilir.…”

Section: Co+h2oh2+co2unclassified

Bir Karbon Tutulum Depolama Teknolojisi-Oksiyanma’nın Akışkan Yataklı Sistemde Deneysel Olarak İncelenmesi

Kayahan¹

2020

Deu Muhendislik Fakultesi Fen Ve Muhendislik

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Öz Artan dünya nüfusu enerji taleplerinde de artış eğiliminin sürmesine neden olmaktadır. Önümüzdeki birkaç on yıl içerisinde fosil yakıtların enerji talebini karşılamada kullanılmaya devam edeceği ön görülmektedir. Fosil yakıt kullanımından kaynaklanan atmosferik CO2 konsantrasyonundaki artışı kontrol altında tutabilmek için farklı teknolojiler önerilmektedir. Oksi-Yanma bu teknolojiler arasında önemli bir yer tutmaktadır. Bu çalışmada seçilen bir Türk Linyiti (Tunçbilek) 30kWth kapasiteli dolaşımlı akışkan yataklı bir yakıcıda oksi yanma ve hava ile yanma koşullarında yakılmıştır. Yapılan testler sonucunda oksi yanma koşullarında kuru bazda %88 oranında CO2 içeren bir baca gazı elde edilmiştir. Ayrıca oksi yanma koşullarında hava ile yanma koşullarına göre daha düşük NOx emisyonu ortaya çıktığı görülmüştür.

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Impurity effects on the oxy-coal combustion power generation system

Cited by 11 publications

References 15 publications

Nitrogen and sulfur conversion during pressurized pyrolysis under CO 2 atmosphere in fluidized bed

Nitrogen and sulfur conversion during pressurized pyrolysis under CO 2 atmosphere in fluidized bed

CO₂ Capture and Use in a Novel Coal-Based Polygeneration System

Bir Karbon Tutulum Depolama Teknolojisi-Oksiyanma’nın Akışkan Yataklı Sistemde Deneysel Olarak İncelenmesi

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Impurity effects on the oxy-coal combustion power generation system

Cited by 11 publications

References 15 publications

Nitrogen and sulfur conversion during pressurized pyrolysis under CO 2 atmosphere in fluidized bed

Nitrogen and sulfur conversion during pressurized pyrolysis under CO 2 atmosphere in fluidized bed

CO2 Capture and Use in a Novel Coal-Based Polygeneration System

Bir Karbon Tutulum Depolama Teknolojisi-Oksiyanma’nın Akışkan Yataklı Sistemde Deneysel Olarak İncelenmesi

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CO₂ Capture and Use in a Novel Coal-Based Polygeneration System