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Pyrolysis gasification of dried sewage sludge in a combined screw and rotary kiln gasifier

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  • Chun, Young Nam
  • Kim, Seong Cheon
  • Yoshikawa, Kunio

Abstract

A pyrolysis gasifier, with carbonization and activation steps, was developed to convert dried sludge into activated char and gas fuel energy. To determine the optimal driving conditions, parametric investigations were conducted on the amount of steam input, pyrolysis gasifier temperature and moisture content in the dried sludge. The optimal conditions for the dried sludge were found to be a steam input of 10 mL/min, gasifier temperature of 820 °C and moisture content of 11% with a holding time in the pyrolysis gasifier of 1 h. The specific area of the activated char was 40.1 m2/g, with an average pore diameter and volume of 63.49 Šand 0.2354 cm3/g, respectively. The pyrolysis gases were H2 (34.1%), CO (18.6%), CH4 (8.5%) and CO2 (8%). The higher heating value for the pyrolysis gas was 10,107 kJ/N m3. To determine the tar adsorption characteristics, a benzene adsorption test was conducted using a fixed bed adsorption tower (H/D = 2, GHSV = 1175/h). The saturation point of the activated char was found after 45 min, and the amount of adsorption was 140 mg/g. Therefore, the pyrolysis gasification of sewage sludge can produce activated char which can be used to reduce tar, and gasification gas which can be utilized as a high enthalpy gas fuel.

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  • Chun, Young Nam & Kim, Seong Cheon & Yoshikawa, Kunio, 2011. "Pyrolysis gasification of dried sewage sludge in a combined screw and rotary kiln gasifier," Applied Energy, Elsevier, vol. 88(4), pages 1105-1112, April.
    • Handle: RePEc:eee:appene:v:88:y:2011:i:4:p:1105-1112
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    5. Sang Yeop Lee & Se Won Park & Md Tanvir Alam & Yean Ouk Jeong & Yong-Chil Seo & Hang Seok Choi, 2020. "Studies on the Gasification Performance of Sludge Cake Pre-Treated by Hydrothermal Carbonization," Energies, MDPI, vol. 13(6), pages 1-15, March.
    6. Chen, Hui & Chen, Dezhen & Hong, Liu, 2015. "Influences of activation agent impregnated sewage sludge pyrolysis on emission characteristics of volatile combustion and De-NOx performance of activated char," Applied Energy, Elsevier, vol. 156(C), pages 767-775.
    7. Ning-Yi Wang & Chun-Hao Shih & Pei-Te Chiueh & Yu-Fong Huang, 2013. "Environmental Effects of Sewage Sludge Carbonization and Other Treatment Alternatives," Energies, MDPI, vol. 6(2), pages 1-13, February.
    8. Campuzano, Felipe & Brown, Robert C. & Martínez, Juan Daniel, 2019. "Auger reactors for pyrolysis of biomass and wastes," Renewable and Sustainable Energy Reviews, Elsevier, vol. 102(C), pages 372-409.
    9. Hong, Sungpyo & Ryu, Changkook & Ko, Han Seo & Ohm, Tae-In & Chae, Jong-Seong, 2013. "Process consideration of fry-drying combined with steam compression for efficient fuel production from sewage sludge," Applied Energy, Elsevier, vol. 103(C), pages 468-476.
    10. Adar, Elanur & Karatop, Buket & İnce, Mahir & Bilgili, Mehmet Sinan, 2016. "Comparison of methods for sustainable energy management with sewage sludge in Turkey based on SWOT-FAHP analysis," Renewable and Sustainable Energy Reviews, Elsevier, vol. 62(C), pages 429-440.
    11. Zhao, Peitao & Ge, Shifu & Yoshikawa, Kunio, 2013. "An orthogonal experimental study on solid fuel production from sewage sludge by employing steam explosion," Applied Energy, Elsevier, vol. 112(C), pages 1213-1221.
    12. Zheng, Ji-Lu & Zhu, Ya-Hong & Zhu, Ming-Qiang & Wu, Hai-Tang & Sun, Run-Cang, 2018. "Bio-oil gasification using air - Steam as gasifying agents in an entrained flow gasifier," Energy, Elsevier, vol. 142(C), pages 426-435.
    13. Sever Akdağ, Ayşe & Atak, Onur & Atimtay, Aysel T. & Sanin, Faika Dilek, 2018. "Co-combustion of sewage sludge from different treatment processes and a lignite coal in a laboratory scale combustor," Energy, Elsevier, vol. 158(C), pages 417-426.
    14. Thanapal, Siva Sankar & Annamalai, Kalyan & Sweeten, John M. & Gordillo, Gerardo, 2012. "Fixed bed gasification of dairy biomass with enriched air mixture," Applied Energy, Elsevier, vol. 97(C), pages 525-531.
    15. Codignole Luz, Fàbio & Cordiner, Stefano & Manni, Alessandro & Mulone, Vincenzo & Rocco, Vittorio, 2018. "Biomass fast pyrolysis in a shaftless screw reactor: A 1-D numerical model," Energy, Elsevier, vol. 157(C), pages 792-805.
    16. Magdziarz, Aneta & Wilk, Małgorzata & Gajek, Marcin & Nowak-Woźny, Dorota & Kopia, Agnieszka & Kalemba-Rec, Izabela & Koziński, Janusz A., 2016. "Properties of ash generated during sewage sludge combustion: A multifaceted analysis," Energy, Elsevier, vol. 113(C), pages 85-94.
    17. Yang, Y. & Brammer, J.G. & Wright, D.G. & Scott, J.A. & Serrano, C. & Bridgwater, A.V., 2017. "Combined heat and power from the intermediate pyrolysis of biomass materials: performance, economics and environmental impact," Applied Energy, Elsevier, vol. 191(C), pages 639-652.
    18. Zhang, Qinglin & Dor, Liran & Fenigshtein, Dikla & Yang, Weihong & Blasiak, Wlodzmierz, 2012. "Gasification of municipal solid waste in the Plasma Gasification Melting process," Applied Energy, Elsevier, vol. 90(1), pages 106-112.

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