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Microwave-assisted co-pyrolysis of brown coal and corn stover for oil production
- Zhang, Yaning, Fan, Liangliang, Liu, Shiyu, Zhou, Nan, Ding, Kuan, Peng, Peng, Anderson, Erik, Addy, Min, Cheng, Yanling, Liu, Yuhuan, Li, Bingxi, Snyder, John, Chen, Paul, Ruan, Roger
- Bioresource technology 2018 v.259 pp. 461-464
- acids, aldehydes, biomass, coal, corn, corn stover, esters, hydrocarbons, ketones, microwave treatment, oils, phenols, pyrolysis, synergism, temperature
- The controversial synergistic effect between brown coal and biomass during co-pyrolysis deserves further investigation. This study detailed the oil production from microwave-assisted co-pyrolysis of brown coal (BC) and corn stover (CS) at different CS/BC ratios (0, 0.33, 0.50, 0.67, and 1) and pyrolysis temperatures (500, 550, and 600 °C). The results showed that a higher CS/BC ratio resulted in higher oil yield, and a higher pyrolysis temperature increased oil yield for brown coal and coal/corn mixtures. Corn stover and brown coal showed different pyrolysis characteristics, and positive synergistic effect on oil yield was observed only at CS/BC ratio of 0.33 and pyrolysis temperature of 600 °C. Oils from brown coal mainly included hydrocarbons and phenols whereas oils from corn stover and coal/corn mixtures were dominated by ketones, phenols, and aldehydes. Positive synergistic effects were observed for ketones, aldehydes, acids, and esters whereas negative synergistic effects for hydrocarbons, phenols and alcohols.