Microwave catalytic co-pyrolysis of chlorella vulgaris and oily sludge: Characteristics and bio-oil analysis

Chen, Chunxiang; Ling, Hongjian; Qiu, Song; Huang, Xiaodong; Fan, Dianzhao; Zhao, Jian

doi:10.1016/j.biortech.2022.127550

Cited by 23 publications

(4 citation statements)

References 44 publications

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“…According to Figure d, the interactions between P, C, and L promoted the production of bio-oil (except for PC ( S = −0.21%)) and biochar, while inhibiting the generation of gas. This might be due to the condensation and polymerization of volatiles derived from P, C, and L, inhibiting the formation of noncondensable gases through secondary cracking. − …”

Section: Resultsmentioning

confidence: 99%

Interaction Effects between the Main Components of Protein-Rich Biomass during Microwave-Assisted Pyrolysis

Hou,

Zhou,

et al. 2024

Environ. Sci. Technol.

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The interaction effects between the main components (proteins (P), carbohydrates (C), and lipids (L)) of proteinrich biomass during microwave-assisted pyrolysis were investigated in depth with an exploration of individual pyrolysis and copyrolysis (PC, PL, and CL) of model compounds. The average heating rate of P was higher than those of C and L, and the interactions in all copyrolysis groups reduced the max instant heating rate. The synergistic extent (S) of PC and PL for bio-oil yield was 16.78 and 18.24%, respectively, indicating that the interactions promoted the production of bio-oil. Besides, all of the copyrolysis groups exhibited a synergistic effect on biochar production (S = 19.43− 28.24%), while inhibiting the gas generation, with S ranging from −20.17 to −6.09%. Regarding the gaseous products, apart from H 2 , P, C, and L primarily generated CO 2 , CO, and CH 4 , respectively. Regarding bio-oil composition, the interactions occurring within PC, PL, and CL exhibited a significantly synergistic effect (S = 47.81−412.96%) on the formation of N-heterocyclics/amides, amides/nitriles, and acids/esters, respectively. Finally, the favorable applicability of the proposed interaction effects was verified with microalgae. This study offers valuable insights for understanding the microwave-assisted pyrolysis of protein-rich biomass, laying the groundwork for further research and process optimization.

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Section: Resultsmentioning

confidence: 99%

Interaction Effects between the Main Components of Protein-Rich Biomass during Microwave-Assisted Pyrolysis

Hou,

Zhou,

et al. 2024

Environ. Sci. Technol.

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“…Due to the characteristics of a large quantity and sufficient source, renewable biomass can be an effective alternative to fossil energy [11]. However, its disadvantages, such as high oxygen content, low calorific value, poor thermal stability, and strong corrosivity, hinder the practical application of bio-oil in industrial production and daily life [12,13]. To solve this problem, co-pyrolysis of biomass with OS is undoubtedly a good method.…”

Section: Of 12mentioning

confidence: 99%

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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“…Another avenue to improve the recovery of pyrolytic products is the co-pyrolysis of oily sludge with other organic matter. Many researchers have used biomass, particularly those from agricultural biomass [166][167][168][169][170]. Some researchers also used organic substances/wastes from industrial sources such as coal, plastics, and waste tires as the feedstock for the co-pyrolysis of oily sludge [171][172][173].…”

Section: Pyrolytic Treatmentmentioning

confidence: 99%

Trend in Research on Characterization, Environmental Impacts and Treatment of Oily Sludge: A Systematic Review

Niu¹,

Sun²,

Lin

2022

Molecules

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Oily sludge is a hazardous material generated from the petroleum industry that has attracted increasing research interest. Although several review articles have dealt with specific subtopics focusing on the treatment of oily sludge based on selected references, no attempt has been made to demonstrate the research trend of oily sludge comprehensively and quantitatively. This study conducted a systematic review to analyze and evaluate all oily sludge-related journal articles retrieved from the Web of Science database. The results show that an increase in oily sludge-related research did not take place until recent years and the distribution of the researchers is geographically out of balance. Most oily sludge-related articles focused on treatment for harmfulness reduction or valorization with limited coverage of formation, characterization, and environmental impact assessment of oily sludge. Pyrolytic treatment has attracted increasing research attention in recent years. So far, the research findings have been largely based on laboratory-scale experiments with insufficient consideration of the cost-effectiveness of the proposed treatment methods. Although many methods have been proposed, few alone could satisfactorily achieve cost-effective treatment goals. To enable sustainable management of oily sludge on a global scale, efforts need to be made to fund more research projects, especially in the major oil-producing countries. Pilot-scale experiments using readily available and affordable materials should be encouraged for practical purposes. This will allow a sensible cost-benefit analysis of a proposed method/procedure for oily sludge treatment. To improve the treatment performance, combined methods are more desirable. To inform the smart selection of methods for the treatment of different oily sludge types, it is suggested to develop universally accepted evaluation systems for characterization and environmental risk of oily sludge.

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Microwave catalytic co-pyrolysis of chlorella vulgaris and oily sludge: Characteristics and bio-oil analysis

Cited by 23 publications

References 44 publications

Interaction Effects between the Main Components of Protein-Rich Biomass during Microwave-Assisted Pyrolysis

Interaction Effects between the Main Components of Protein-Rich Biomass during Microwave-Assisted Pyrolysis

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

Trend in Research on Characterization, Environmental Impacts and Treatment of Oily Sludge: A Systematic Review

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