Bio-oil production from refinery oily sludge using hydrothermal liquefaction technology

Nazem, Mohammad Ali; Tavakoli, Omid

doi:10.1016/j.supflu.2017.03.020

Cited by 53 publications

(17 citation statements)

References 30 publications

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“…There are different techniques for the treatment of oily sludge, and the choice depends on the desired aim to be achieved [ 8 ]. Various oily sludge treatment methods include centrifugation, froth flotation, solidification/stabilization, solvent extraction, surfactant EOR (enhanced oil recovery), landfarming, pyrolysis, biodegradation, photocatalysis, ultrasonic treatment, and incineration [ 9 , 10 , 11 , 12 , 13 ]. Researchers have concluded that it is ineffective to implement a typical method to fully remove the dangers of the oily sludge without any side-effects, and these methods may either partially or fully decrease the harmful substances in petroleum sludge to a minimum acceptable level [ 14 ].…”

Section: Introductionmentioning

confidence: 99%

Optimization of Cement-Based Mortar Containing Oily Sludge Ash by Response Surface Methodology

et al. 2021

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In the industries of petroleum extraction, a large volume of oily sludge is being generated. This waste is usually considered difficult to dispose of, causing environmental and economic issues. This study presented the novel experimental method of manufacturing mortar used in civil construction by cement and oily sludge ash (OSA). The defined method was described with a logical experimental study conducted to examine a feasible manufacturing method for casting cement-based mortars by partially replacing cement with OSA. Replacement concentrations for OSA ranged from 0 to 20 percent by cement weight, while the water-to-cement (w/c) ratio was varied from 0.4 to 0.8, and the amount of sand was kept constant. The strengths and absorption rate of the mortar were monitored for 28 days. The OSA contains a crystalline structure with packs of angular grains. Because of OSA in the cement-based mortar mixtures and water-to-cement ratios, the mechanical strength was improved significantly. However, the water absorption trend increased linearly. Using variance analysis, the influence of OSA and w/c ratio on the behavior of mortar was acquired. The developed models were significant for all p-value reactions of <5%. Numerical optimization results showed that the best mixture can be obtained by replacing 8.19 percent cement with OSA and 0.52 as a ratio of w/c.

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Section: Introductionmentioning

confidence: 99%

Optimization of Cement-Based Mortar Containing Oily Sludge Ash by Response Surface Methodology

et al. 2021

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“…Petroleum sludge is a thick and viscous combination of solid residue, waste oil products, hydrocarbons, and water, that is generated during the crude oil refining processes, storage, as well as vessel cleaning [ 23 , 24 , 25 ], and it is produced more than 6 million tons annually in China [ 26 , 27 ]. The main areas of producing petroleum sludge are crude oil storage vessels and the separation of water from oil [ 23 ].…”

Section: Introductionmentioning

confidence: 99%

“…The mixture of petroleum sludge is mainly generated due to sedimentation and accumulation of crude oil in the storage tanks [ 29 ]. Petroleum sludge consists of petroleum hydrocarbons like aromatic, asphaltene, aliphatic, and components of nitrogen sulfur-oxygen [ 25 , 30 ]. It is characterized by alkanes 40–52%, aromatics 28–31%, resins 7–22.5%, and asphaltenes 8– 10% [ 31 ].…”

Section: Introductionmentioning

confidence: 99%

Performance of Fly Ash-Based Inorganic Polymer Mortar with Petroleum Sludge Ash

et al. 2021

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Petroleum sludge is a waste product resulting from petroleum industries and it is a major source of environmental pollution. Therefore, developing strategies aimed at reducing its environmental impact and enhance cleaner production are crucial for environmental mortar. Response surface methodology (RSM) was used in designing the experimental work. The variables considered were the amount of petroleum sludge ash (PSA) in weight percent and the ratio of sodium silicate to sodium hydroxide, while the concentration of sodium hydroxide was kept constant in the production of geopolymer mortar cured at a temperature of 60 °C for 20 h. The effects of PSA on density, compressive strength, flexural strength, water absorption, drying shrinkage, morphology, and pore size distribution were investigated. The addition of PSA in the mortar enhanced the mechanical properties significantly at an early age and 28 days of curing. Thus, PSA could be used as a precursor material in the production of geopolymer mortar for green construction sustainability. This study aimed to investigate the influence of PSA in geopolymer mortar.

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“…As a result of the high content of the oil fraction, oily sludge has high potential for aromatic hydrocarbon production. Previous studies − have found many valuable aromatic species in the pyrolysis products of oily sludge. Nazem et al obtained mono- and polyaromatic compounds through direct hydrothermal liquefaction of oily sludge from an Iranian oil refinery.…”

Section: Introductionmentioning

confidence: 99%

“…Previous studies − have found many valuable aromatic species in the pyrolysis products of oily sludge. Nazem et al obtained mono- and polyaromatic compounds through direct hydrothermal liquefaction of oily sludge from an Iranian oil refinery. Evans et al recovered C 5 –C 11 hydrocarbons from oily sludge, and the analysis results showed the predominance of polar aromatic compounds, some of which belonged to the polycyclic aromatic hydrocarbon (PAH) family.…”

Section: Introductionmentioning

confidence: 99%

Aromatic Hydrocarbon Production and Catalyst Regeneration in Pyrolysis of Oily Sludge Using ZSM-5 Zeolites as Catalysts

et al. 2017

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ZSM-5 zeolites were selected as catalysts to promote the aromatization during pyrolysis of oily sludge. The total aromatic yield and product distribution were investigated to evaluate the efficiency of the catalysts and the influence of operating condition. The fresh and used catalysts were characterized by means of scanning electron microscopy, inductively coupled plasma optical emission spectrometry, X-ray diffraction, and ammonia temperature-programmed desorption. Results show that the highest catalytic activity (93.37%) was achieved with ZSM-5-O [the silicon/aluminum ratio (SAR) is 19] at a retention time of 40 s. The total aromatic yield increases with a longer retention time and higher catalyst dosage. An increase in the SAR value of ZSM-5 zeolites will reduce its acid density and aromatization activity. The coke deposition leading to deactivation for zeolites was observed, and calcination was used to regenerate the original catalytic performance. After regeneration, crystallinity was not affected but the acidity was reduced because of dealumination. The regenerated zeolites showed comparable catalytic activity for aromatization, and the tricyclic aromatic hydrocarbon content increased with reaction–regeneration cycles.

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Bio-oil production from refinery oily sludge using hydrothermal liquefaction technology

Cited by 53 publications

References 30 publications

Optimization of Cement-Based Mortar Containing Oily Sludge Ash by Response Surface Methodology

Optimization of Cement-Based Mortar Containing Oily Sludge Ash by Response Surface Methodology

Performance of Fly Ash-Based Inorganic Polymer Mortar with Petroleum Sludge Ash

Aromatic Hydrocarbon Production and Catalyst Regeneration in Pyrolysis of Oily Sludge Using ZSM-5 Zeolites as Catalysts

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