Co-pyrolysis coupled with torrefaction enhances hydrocarbons production from rice straw and oil sludge: The effect of torrefaction on co-pyrolysis synergistic behaviors

Xu, Hao; Cheng, Shuo; Hungwe, Douglas; Yoshikawa, Kunio; Takahashi, Fumio

doi:10.1016/j.apenergy.2022.120104

Cited by 17 publications

(2 citation statements)

References 53 publications

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“…According to previous reports, most biomass pyrolysis occurs between 220-520 • C. The volatilization temperature of light and heavy components of OS occurred at 240-550 • C and 700-850 • C, respectively. We chose four different heating rates for the experiments so that the activation energy could be calculated by the equal conversion method [7,16]. Thus, the sample was heated from 50 • C to 850 • C at four heating rates (10,20,30, and 40 • C/min).…”

Section: Thermogravimetric Experimentsmentioning

confidence: 99%

“…Considering the energy demand and environmental protection, the ultimate goal of OS treatment is to immobilize the hazardous elements in the residue and to improve crude oil utilization. Among the various OS treatment technologies, pyrolysis is the most suitable method for achieving this goal [7]. Although pyrolysis technology has been previously reported to have an excellent ability in the reduction of oil content, it is difficult to ensure that the heavy oil fraction in OS meets the standard just by raising the temperature.…”

Section: Introductionmentioning

confidence: 99%

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Investigation of Catalytic Co-Pyrolysis Characteristics and Synergistic Effect of Oily Sludge and Walnut Shell

Yang

Jiang

et al. 2023

IJERPH

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The co-pyrolysis of oily sludge and walnut shell is a reliable method for solid waste treatment and waste recycling. In this paper, a thermogravimetric analysis was used to study the thermodynamics and synergy effect of oily sludge (OS) and walnut shell (WS) at four heating rates (10, 20, 30, and 40 °C/min) in the temperature range from 50–850 °C. Two model-free methods (FWO and KAS) were used to calculate the activation energy. The results showed that the heating rate had no significant effect on the pyrolysis process. The addition of walnut shell improved the pyrolysis process of the samples. Mixture 1OS3WS had a synergy effect, while other blends showed an inhibitory effect. The synergy effect of co-pyrolysis was strongest when the mass ratio of oily sludge was 25%. The activation energy of the Zn-ZSM-5/25 catalyst was the lowest, and the residual substances were the least, indicating that the Zn-ZSM-5/25 was beneficial to the co-pyrolysis of oily sludge and walnut shell. The analysis of catalytic pyrolysis products by Py-GC/MS found that co-pyrolysis was beneficial to the generation of aromatic hydrocarbons. This study provided a method for the resource utilization of hazardous waste and biomass waste, which was conducive to the production of aromatic chemicals with added value while reducing environmental pollution.

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