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Gasification performance of the hydrochar derived from co-hydrothermal carbonization of sewage sludge and sawdust

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  • Ma, Jing
  • Chen, Mengjun
  • Yang, Tianxue
  • Liu, Zhengang
  • Jiao, Wentao
  • Li, Dong
  • Gai, Chao

Abstract

Co-hydrothermal carbonization (co-HTC) is recognized as a promising pretreatment for upgrading fuel quality of high moisture biomass prior to further thermal conversion. The properties of the hydrochar derived from co-HTC of sewage sludge (SS) and sawdust (SD), and CO2 gasification characteristics of the hydrochar were investigated. The results showed that the hydrochar had enhanced aromatic degree and increased metals content compared to raw sludge. The hydrochar also exhibited an enhanced gasification reactivity, resulting in high carbon monoxide content in the syngas than that from SS under identical conditions. The temperature and SD/SS mass ratio had a significant influence on the syngas composition mainly by the Boudouard reaction and water gas reaction. The gasification reactivity was strongly associated with the inorganic elements, and the KAlSi3O8 inhibited while the K2CO3 promoted the gasification reaction of hydrochars. Under optimal conditions, a high gasification efficiency of 77.73% was obtained, and the lower heating value of the syngas reached 8.15 MJ/Nm3. This study indicated that co-HTC of SS and SD combined with subsequent gasification had promising potential towards syngas production with high quality.

Suggested Citation

  • Ma, Jing & Chen, Mengjun & Yang, Tianxue & Liu, Zhengang & Jiao, Wentao & Li, Dong & Gai, Chao, 2019. "Gasification performance of the hydrochar derived from co-hydrothermal carbonization of sewage sludge and sawdust," Energy, Elsevier, vol. 173(C), pages 732-739.
    • Handle: RePEc:eee:energy:v:173:y:2019:i:c:p:732-739
    DOI: 10.1016/j.energy.2019.02.103
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    2. Kim, Jung-Hun & Oh, Jeong-Ik & Lee, Jechan & Kwon, Eilhann E., 2019. "Valorization of sewage sludge via a pyrolytic platform using carbon dioxide as a reactive gas medium," Energy, Elsevier, vol. 179(C), pages 163-172.
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    4. Peng, Nana & Gai, Chao & Peng, Chao, 2020. "Enhancing hydrogen-rich syngas production and energy recovery efficiency by integrating hydrothermal carbonization pretreatment with steam gasification," Energy, Elsevier, vol. 210(C).
    5. Salaudeen, Shakirudeen A. & Acharya, Bishnu & Dutta, Animesh, 2021. "Steam gasification of hydrochar derived from hydrothermal carbonization of fruit wastes," Renewable Energy, Elsevier, vol. 171(C), pages 582-591.
    6. 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.
    7. Celiktas, Melih Soner & Alptekin, Fikret Muge, 2019. "Conversion of model biomass to carbon-based material with high conductivity by using carbonization," Energy, Elsevier, vol. 188(C).
    8. Attasophonwattana, Patcharaporn & Sitthichirachat, Panawit & Siripaiboon, Chootrakul & Ketwong, Tulakarn & Khaobang, Chanoknunt & Panichnumsin, Pornpan & Ding, Lu & Areeprasert, Chinnathan, 2022. "Evolving circular economy in a palm oil factory: Integration of pilot-scale hydrothermal carbonization, gasification, and anaerobic digestion for valorization of empty fruit bunch," Applied Energy, Elsevier, vol. 324(C).
    9. Djandja, Oraléou Sangué & Kang, Shimin & Huang, Zizhi & Li, Junqiao & Feng, Jiaqi & Tan, Zaiming & Salami, Adekunlé Akim & Lougou, Bachirou Guene, 2023. "Machine learning prediction of fuel properties of hydrochar from co-hydrothermal carbonization of sewage sludge and lignocellulosic biomass," Energy, Elsevier, vol. 271(C).
    10. Ioannis O. Vardiambasis & Theodoros N. Kapetanakis & Christos D. Nikolopoulos & Trinh Kieu Trang & Toshiki Tsubota & Ramazan Keyikoglu & Alireza Khataee & Dimitrios Kalderis, 2020. "Hydrochars as Emerging Biofuels: Recent Advances and Application of Artificial Neural Networks for the Prediction of Heating Values," Energies, MDPI, vol. 13(17), pages 1-20, September.
    11. Kossińska, Nina & Krzyżyńska, Renata & Ghazal, Heba & Jouhara, Hussam, 2023. "Hydrothermal carbonisation of sewage sludge and resulting biofuels as a sustainable energy source," Energy, Elsevier, vol. 275(C).

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