Co-pyrolysis of Spent Tea Waste and Tangerine Peels with Different Catalysts (ZnCl2, H3PO4 and KOH) by Microwave-Assisted Pyrolysis.

Autor: Erkus, Hilal, Calhan, Rahman
Předmět:
Zdroj: BioEnergy Research; Jun2023, Vol. 16 Issue 2, p1099-1107, 9p
Abstrakt: In this study, a mixture of tangerine peel (TP) and spent tea waste (STW) is used as a new precursor material to obtain a high surface area of activated carbon (AC) by a two-step chemical activation approach in microwave-assisted pyrolysis (MAP). In the first step, to produce AC from a mixture of TP and STW, samples were impregnated with alkali metal hydroxide and then ZnCl2, H3PO4 and KOH were used as catalysts. All experiments were conducted under 600–700 W microwave power for 20 and 30 min. The obtained AC was characterized using nitrogen adsorption–desorption isotherms, thermogravimetric analysis (TGA), scanning electron microscopy (SEM), and Fourier transform infrared spectroscopy (FT-IR) analysis. The results showed a higher BET surface area in all samples at higher microwave power. The highest BET surface area was reached in AC activated with ZnCl2 (STT1) at 700 W microwave power at 20 min of microwave irradiation time with 853.41 m2/g. Adsorption–desorption isotherms showed that the obtained ACs have micro and mesopores. While the highest micropore area was obtained in STT1 activated with ZnCl2 at 423.83 m2/g, the average pore size was 1.173 nm. [ABSTRACT FROM AUTHOR]
Databáze: Complementary Index