期刊
SCIENCE OF THE TOTAL ENVIRONMENT
卷 906, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.scitotenv.2023.167420
关键词
Municipal solid waste incineration fly ash; Net-zero waste; Cordierite; Catalyst; Volatile organic chemicals
This study successfully synthesized cordierite using MSWI fly ash as an additive and improved its properties. The cordierite showed promising performance as a heat accumulator and catalyst carrier, surpassing the commercial cordierite in terms of strength and pollutant removal efficiency.
Municipal solid waste incineration (MSWI) fly ash is a hazardous waste, which needs various recycling in order to reach net-zero waste. This work aimed to synthesize cordierite using MSWI fly ash as one additive and investigate influence of the additive on properties of the cordierite. As a result, the cordierite was successfully synthesized when the additive weight ratio was <15 % and the synthesis strategy was universally feasible for 14 kinds of different MSWI fly ashes. As a heat accumulator, the cordierite attained compressive strength of 42.1 MPa, water absorption of 26 %, bulk density of 1.87 g & sdot;cm(-3), and open porosity of 47 %. After five cycles of thermal impact at 1200 degree celsius, the strength was only decreased by 15 %. These properties were comparable to a commercial cordierite. As a catalyst carrier, after loading Mn and Cu species, the cordierite removed 100 % of toluene at 250 degree celsius. In comparison, a commercial cordierite only got a removal of 34.4 %. The enhanced activity was attributed to co-existing spinel and bytownite as well as imbedded Zn and Cu in the MSWI fly ash-added cordierite. Therefore, this work devotes to hazardous recycling, green development, and cycled economy.
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