Pyrolysis of oil sludge with calcium-containing additive

Pánek, Petr; Kostura, Bruno; Čepeláková, Iveta; Koutník, Ivan; Tomšej, Tomáš

doi:10.1016/j.jaap.2014.04.005

Cited by 67 publications

(15 citation statements)

References 28 publications

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“…To achieve effective remediation of oily sludge, a variety of oily sludge treatment methods have been developed, such as land-farming, incineration, solidifi cation/stabilization, solvent extraction, ultrasonic treatment, pyrolysis, photocatalysis, chemical treatment, and biodegradation (Liu 2009, Kök 1998, Beis et al 2002, Ciajolo 1984, Saha et al 2006, Li et al 1995, Ubani et al 2016. Among those treatment technologies, the conversion of oily sludge into various useful materials, such as lower molecular weight organic compounds and carbonaceous residue, not only solves the disposal problem but also matches the appeal of resource utilization (Pánek et al 2014). Thus, thermal disposal approaches such as pyrolysis to convert this stored energy into a usable energy source have been developed for heating or perhaps as a liquid fuel substitute.…”

Section: Introductionmentioning

confidence: 99%

Low-temperature pyrolysis of oily sludge: roles of Fe/Al-pillared bentonites

Jia

Zhao

Zhou

et al. 2017

Archives of Environmental Protection

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Pyrolysis is potentially an effective treatment of oily sludge for oil recovery, and the addition of a catalyst is expected to affect its pyrolysis behavior. In the present study, Fe/Al-pillared bentonite with various Fe/Al ratios as pyrolysis catalyst is prepared and characterized by XRD, N2adsorption, and NH3-TPD. The integration of Al and Fe in the bentonite interlayers to form pillared clay is evidenced by increase in the basal spacing. As a result, a critical ratio of Fe/Al exists in the Fe/Al-pillared bentonite catalytic pyrolysis for oil recovery from the sludge. The oil yield increases with respect to increase in Fe/Al ratio of catalysts, then decreases with further increasing of Fe/Al ratio. The optimum oil yield using 2.0 wt% of Fe/Al 0.5-pillared bentonite as catalyst attains to 52.46% compared to 29.23% without catalyst addition in the present study. In addition, the addition of Fe/Al-pillared bentonite catalyst also improves the quality of pyrolysis-produced oil and promotes the formation of CH4. Fe/Al-pillared bentonite provides acid center in the inner surface, which is beneficial to the cracking reaction of oil molecules in pyrolysis process. The present work implies that Fe/Al-pillared bentonite as addictive holds great potential in industrial pyrolysis of oily sludge.

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Section: Introductionmentioning

confidence: 99%

Low-temperature pyrolysis of oily sludge: roles of Fe/Al-pillared bentonites

Jia

Zhao

Zhou

et al. 2017

Archives of Environmental Protection

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“…A large amount of data shows that the volatile content in oily sludge is extremely high, which can generally reach 30-50% in dry sludge. The content of fixed carbon is relatively low, generally less than 5% [32,33].…”

Section: Main Sources Of Oily Sludgementioning

confidence: 99%

Application and development of pyrolysis technology in petroleum oily sludge treatment

Wang

Gong

Wang

et al. 2020

Environmental Engineering Research

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With the enhancement of public awareness of environmental protection, the harm of oily sludge has gradually been paid attention to. As a kind of dangerous solid waste, the arbitrary disposal of oily sludge will cause quite serious harm to both the environment and human beings. Research on the treatment methods of oily sludge has become a hot spot recently. At present, treatment methods of oily sludge are various, mainly including pyrolysis, direct combustion, freeze-thaw treatment, biological treatment, solvent extraction, thermochemical cleaning, ultrasound-assisted treatment or joint technology, etc. Based on the consideration of economic benefits, social benefits and treatment difficulties, pyrolysis has been considered to be the most appropriate method for oily sludge treatment. Syngas, liquid oil and char can be obtained from pyrolysis of oily sludge, which can meet different needs. In this paper, the pyrolysis technology of oily sludge is reported in detail, including pyrolysis methods, operational parameters and pyrolysis products of oily sludge. On the basis, the advantages and limitations of oily sludge pyrolysis technology are discussed, together with the report of feasibility of pyrolysis technology of oily sludge. Moreover, the development trend of pyrolysis technology of oily sludge is prospected for the future work.

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“…Vast amount of studies on the addition of catalysts to the oily sludge during the pyrolysis process have been conducted. A variety of catalysts have been widely used for the oily sludge pyrolysis, such as aluminum compounds ( [11][12][13][14][15]. Lin et al [11] suggested that quality of pyrolysis oil was improved due to the addition of KOH according to smaller average molecular weight, lower viscosity, higher heating value, less asphaltenes and more straight chain hydrocarbons.…”

Section: Introductionmentioning

confidence: 99%

Oily sludge catalytic pyrolysis combined with fine particle removal using a Ni-ceramic membrane

Gao

Quan

et al. 2020

Fuel

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Pyrolysis is one of the effective technology for oily sludge treatment and energy recovery. However, pyrolysis of oily sludge generates solid particles which are taken away from the reactor by gas, causing blockage in downstream equipment and reducing the quality of pyrolysis oil and gas. A study on the clean catalytic pyrolysis of oily sludge was carried out, by incorporating a ceramic membrane with or without Ni inside the pyrolysis reactor. It aims to investigate the effect of ceramic membrane on oily sludge pyrolysis and particulate removal. The yield of the pyrolysis gas produced from the reaction with Ni-ceramic membrane is 31.46 L/kg, while the recovery rate of pyrolysis oil is 48.21%.On the contrary, the yield of the pyrolysis gas produced from the reaction with blank ceramic membrane is 17.92 L/kg, while the recovery rate of pyrolysis oil is 62.63%. The particulate matter content in gas without and with Ni-ceramic membrane are 2.74 and 0.07 mg/L. The particulate matter content in oil without and with Ni-ceramic membrane are 3708.9 and 156.7 mg/L, respectively. Results indicated that the Ni catalyst loading on the ceramic membrane could improve the yield of the pyrolysis gas and remove the fine particles effectively. In addition, a long-time catalytic pyrolysis experiment was carried out, with the feeding speed of 4.17 g/min and the reaction temperature of 500 o C. It was found from the set conditions that the Ni-ceramic membrane could be *Revised Manuscript clean and final version Click here to view linked References used continuously for 420 min.

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Pyrolysis of oil sludge with calcium-containing additive

Cited by 67 publications

References 28 publications

Low-temperature pyrolysis of oily sludge: roles of Fe/Al-pillared bentonites

Low-temperature pyrolysis of oily sludge: roles of Fe/Al-pillared bentonites

Application and development of pyrolysis technology in petroleum oily sludge treatment

Oily sludge catalytic pyrolysis combined with fine particle removal using a Ni-ceramic membrane

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