Study of oily sludge pyrolysis combined with fine particle removal using a ceramic membrane in a fixed-bed reactor

Quan, Cui; Wang, Xiao; Wu, Chunfei

doi:10.1016/j.cep.2018.03.002

Cited by 35 publications

(13 citation statements)

References 30 publications

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“…Compared with the fluffy and massive structure of OSA, the microstructure of OSA-CaO was relatively uniform and compact. It may be attributed to the reaction between heavy metals and CaO, which formed a glass phase during incineration. ,, All of the properties had a solidifying effect on heavy metals, for example, the reaction of As 2 O 3 and CaO could form a stable Ca 3 (AsO 4 ) 2 , which promoted the residue of As.…”

Section: Resultsmentioning

confidence: 99%

“…Adding calcium-based compounds during solid fuel incineration will help to reduce the emission of SO 2 Moreover, the sulfur in the fuel can react with CaO and form CaSO 4 , which reduces the emission of sulfur oxides and CaO can provide a chemical adsorption site for heavy metals in fuels and stabilize heavy metals. − In this sense, it has been proved to be an effective way to reduce the release of heavy metals by adding calcium-based compounds in the incineration of solid fuels. Adsorption of heavy metals by mineral compounds includes physical adsorption and chemical adsorption.…”

Section: Introductionmentioning

confidence: 99%

“…Currently, the increasing ratio of high-sulfur crude oil worldwide results in the growth of high-sulfur-containing OS. The study on the desulfurization of high-sulfur OS while stabilizing heavy metals was of great significance to the comprehensive utilization of large-scale high-sulfur OS as well as achieving reduction and harmlessness of high-sulfur OS. ,, In this paper, incineration experiments of OS with and without CaO were carried out respectively. With the help of an inductively coupled plasma-optical emission spectrometer (ICP-OES), the total amount and leachability of As, Pb, and Ni in samples were measured by the toxicity characteristic leaching procedure (TCLP), respectively.…”

Section: Introductionmentioning

confidence: 99%

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Study on the Migration Characteristics of As, Pb, and Ni during Oily Sludge Incineration with CaO Additive

et al. 2020

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Adding CaO during oily sludge (OS) incineration is viewed as an efficient approach to treat high-sulfur-containing OS on a large scale. It can effectively reduce the content of SO2 and affect the migration and transformation of heavy metals. To explore the effect of CaO on the migration characteristics of As, Pb, and Ni during OS incineration, incineration experiments of OS with and without CaO were carried out respectively in a horizontal tube furnace at temperatures ranging from 800 to 1000 °C. The total amount and leachability of As, Pb, and Ni in samples were presented in this paper. The results showed that the migration characteristics of As, Pb, and Ni during OS incineration were affected by incineration temperature and CaO. As temperature increases, the residue ratios of As and Pb in bottom ash decreased, but Ni increased first and then decreased. CaO played an important role in promoting the residue of As and Pb in bottom ash. Moreover, when adding CaO, the leachability of As and Pb in bottom ash was significantly reduced. The results will supply essential data and theoretical support for the innocuous treatment of OS.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Study on the Migration Characteristics of As, Pb, and Ni during Oily Sludge Incineration with CaO Additive

et al. 2020

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“…Lilly Shen et al pointed out that nitrogen flow speed should be at least 5 times faster than the vulcanization speed [85]. In many studies, nitrogen flux is generally distributed between 50-200 mL/min in related reports [80,[86][87][88][89]. It is worth mentioning that the protective gas is required to enter the reactor before pyrolysis to ensure that air is not mixed in pyrolysis atmosphere.…”

Section: Pyrolysis 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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“…So far, there are few studies on the ceramic membrane as active core to support nickel for oily sludge pyrolysis. Furthermore, our previous research results suggested that the ceramic membrane can remove particulate matter from the pyrolysis gas [23]. In order to improve the quality of pyrolysis products and remove particulate matter at the same time, tubular ceramic membrane was selected as the catalyst carrier.…”

Section: Introductionmentioning

confidence: 99%

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

Gao

Quan

et al. 2020

Fuel

Self Cite

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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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Study of oily sludge pyrolysis combined with fine particle removal using a ceramic membrane in a fixed-bed reactor

Cited by 35 publications

References 30 publications

Study on the Migration Characteristics of As, Pb, and Ni during Oily Sludge Incineration with CaO Additive

Study on the Migration Characteristics of As, Pb, and Ni during Oily Sludge Incineration with CaO Additive

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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