Abstract
The transition from fossil fuels to renewable energy sources necessitates innovative approaches to biomass utilization. Despite the recognized benefits of microwave-assisted biomass pyrolysis, the reliance on costly microwave susceptors poses challenges. This study centers on the innovative utilization of a variable-frequency microwave approach, particularly at 5525 MHz, eliminating the need for microwave susceptors. Remarkably, at this frequency, corn stalk pyrolysis achieved a temperature of 589 °C with a rapid heating rate of 327.7 °C/min, showcasing a 69.5% conversion rate without susceptors. Furthermore, the study investigated the interplay between microwave frequency and alkali metal content, revealing a direct correlation between K+ and biomass conversion rates. Our findings highlight the transformative potential of 5525 MHz in biomass pyrolysis, offering a cost-effective and environmentally friendly alternative to microwave susceptors, with implications for sustainable energy and industrial applications.
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