TY - JOUR
T1 - The Role of Solvent Soaking and Pretreatment Temperature in Microwave-Assisted Pyrolysis of Waste Tea Powder: Analysis of Products, Synergy, Pyrolysis Index, and Reaction Mechanism
AU - Talib Hamzah, Husam
AU - Sridevi, Veluru
AU - Seereddi, Meghana
AU - Suriapparao, Dadi V
AU - Ramesh, Potnuri
AU - Sankar Rao, Chinta
AU - Gautam, Ribhu
AU - Kaka, Fiyanshu
AU - Pritam, Kocherlakota
N1 - KAUST Repository Item: Exported on 2022-09-14
PY - 2022/9/8
Y1 - 2022/9/8
N2 - This study focuses on microwave-assisted pyrolysis (MAP) of fresh waste tea powder and torrefied waste tea powder as feedstocks. Solvents including benzene, acetone, and ethanol were used for soaking feedstocks. The feedstock torrefaction temperature (at 150 oC) and solvents soaking enhanced the yields of char (44.2-59.8 wt %) and the oil (39.8-45.3 wt %) in MAP. Co-pyrolysis synergy induced an increase in the yield of gaseous products (4.7-20.1 wt %). The average heating rate varied in the range of 5-25°C/min. The energy consumption in MAP of torrefied feedstock (1386 KJ) significantly decreased compared to fresh (3114 KJ). The pyrolysis index dramatically varied with the solvent soaking in the following order: ethanol (26.7) > benzene (25.6) > no solvent (10) > acetone (6). It shows that solvent soaking plays an important role in the pyrolysis process. The obtained bio-oil was composed of mono-aromatics, poly-aromatics, and oxygenated compounds.
AB - This study focuses on microwave-assisted pyrolysis (MAP) of fresh waste tea powder and torrefied waste tea powder as feedstocks. Solvents including benzene, acetone, and ethanol were used for soaking feedstocks. The feedstock torrefaction temperature (at 150 oC) and solvents soaking enhanced the yields of char (44.2-59.8 wt %) and the oil (39.8-45.3 wt %) in MAP. Co-pyrolysis synergy induced an increase in the yield of gaseous products (4.7-20.1 wt %). The average heating rate varied in the range of 5-25°C/min. The energy consumption in MAP of torrefied feedstock (1386 KJ) significantly decreased compared to fresh (3114 KJ). The pyrolysis index dramatically varied with the solvent soaking in the following order: ethanol (26.7) > benzene (25.6) > no solvent (10) > acetone (6). It shows that solvent soaking plays an important role in the pyrolysis process. The obtained bio-oil was composed of mono-aromatics, poly-aromatics, and oxygenated compounds.
UR - http://hdl.handle.net/10754/681236
UR - https://linkinghub.elsevier.com/retrieve/pii/S0960852422012469
U2 - 10.1016/j.biortech.2022.127913
DO - 10.1016/j.biortech.2022.127913
M3 - Article
C2 - 36089130
SN - 0960-8524
SP - 127913
JO - Bioresource technology
JF - Bioresource technology
ER -
