Effect of hydrotreating conditions on Maya asphaltenes composition and structural parameters

Trejo, Fernando; Ancheyta, Jorge; Centeno, Guillermo; Marroquín, Gustavo

doi:10.1016/j.cattod.2005.08.013

Cited by 52 publications

(25 citation statements)

References 20 publications

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“…It is known that $60-70% of the metals are in the asphaltenes, with the remaining being in the form of porphyrin isolated molecules [34]. In other words, metals are contained in large molecules present in the feed.…”

Section: Hdt Real Feed (Maya Heavy Crude)mentioning

confidence: 99%

Hydrodesulfurization and hydrocracking of Maya crude with P-modified NiMo/Al2O3 catalysts

Rayo

Ramı́rez

Torres–Mancera

et al. 2012

Fuel

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Section: Hdt Real Feed (Maya Heavy Crude)mentioning

confidence: 99%

Hydrodesulfurization and hydrocracking of Maya crude with P-modified NiMo/Al2O3 catalysts

Rayo

Ramı́rez

Torres–Mancera

et al. 2012

Fuel

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“…Asphaltenes constitute a complex mixture of heavy hydrocarbons and heteroatom-and metal-containing hydrocarbon oligomers which are insoluble in aliphatic hydrocarbon solvents (n-pentane and n-heptane). Maltenes are composed of saturate compounds, aromatic compounds and non-hydrocarbons which are soluble in n-heptane [42,43]. The higher the heating rate is, the less asphaltenes and maltenes decompose to gases, oil and coke in the second reaction step.…”

Section: Elemental Analysis (Chn)mentioning

confidence: 99%

Effect of Heating Rate on Products Yield and Characteristics of Non-Condensable Gases and Shale Oil Obtained by Retorting Dachengzi Oil Shale

Wang¹,

Liu²,

Jiang

et al. 2013

Oil Shale

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Oil shale samples from Dachengzi mine located in Huadian city, Jilin province, China, were retorted in a stainless-steel cylindrical retort at a heating rate varied from 5 to 20 o C min-1 up to a final temperature of 520 o C under argon atmosphere. The influence of heating rate on the products yield and characteristics of shale oil and non-condensable gases was determined. It was observed that the shale oil yield first increased and then slightly diminished as the heating rate increased. The maximum shale oil yield was found to be 15.696 wt.% at a heating rate of 12 o C min-1. The non-condensable gases yield increased with increasing heating rate. There was a corresponding decrease in the shale char yield. The carbon and nitrogen weight contents of the derived shale oil increased with increasing heating rate, while those of hydrogen and oxygen decreased. The sulfur weight content was not significantly affected by increasing the heating rate. As the heating rate increased from 5 to 20 o C min-1 , the atomic H/C and O/C ratios of the derived shale oil decreased from 1.918 to 1.727 and from 0.116 to 0.048, respectively. Compared to crude oils, the produced shale oil had a higher atomic O/C ratio and a similar atomic H/C ratio, as well as a higher light oil content, which showed that the properties of shale oil were superior to those of crude oil. The liquid shale oil could be classified as a sweet and highnitrogen oil in terms of the classification method of crude oil. Increasing heating rate decreased the content of saturates and aromatics and increased that of light oil, asphaltenes and non-hydrocarbons of the produced shale oil. The non-condensable gases contained high amounts of CH 4 and minor concentrations of C 2-C 4 hydrocarbons. Increasing heating rate shifted the maximum concentration of C 1-C 4 hydrocarbons to higher temperature and increased the total content of C 1-C 4 hydrocarbons. The alkene/alkane gases

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“…The bitumen may be separated into asphaltenes and maltenes. Maltenes are composed of saturated and aromatic compounds, as well as non-hydrocarbons which are soluble in n-heptane [35,36]. As the residence time increases, the asphaltenes and maltenes content increases, but that of aromatics, aliphatics and non-hydrocarbons decreases.…”

Section: Chemical Class Fractionationmentioning

confidence: 99%

Effect of Residence Time on Products Yield and Characteristics of Shale Oil and Gases Produced by Low-Temperature Retorting of Dachengzi Oil Shale

Wang¹,

Jiang

Han³

et al. 2013

Oil Shale

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Oil shale samples from Dachengzi mine located in Huadian city, Jilin province, China, were retorted in a stainless-steel cylindrical retort under argon atmosphere to determine the influence of residence time on the products yield and characteristics of shale oil and gases. It was found that the liquid yield increased with increasing residence time from 6 to 40 min, and then leveled off as the residence time further increased. The gases yield also increased with increasing residence time, while the shale char yield decreased. When prolonging the residence time from 6 to 60 min, the atomic H/C ratio of the derived shale oils decreased from 2.007 to 1.768, both the oxygen and sulfur content also decreased, while the nitrogen content slightly increased. It was also noticed that high boiling point oils were produced in the initial stage of the retorting process and low boiling point oils in its later stages. The shale oil obtained in 20 min had the lowest quantity of heavy fractions, 52.8 wt%, whilst the shale oils produced in 40 and 60 min showed similar boiling point distribution. The produced shale oils had similar atomic H/C ratio and lower heavy oil content compared to crude oils, and could be classified as sweet and high-nitrogen oil in terms of the classification method of crude oil. Extending the residence time decreased the aliphatics content and increased the aromatics content of the produced shale oil. When the residence time was 40 min, the derived oil contained the lowest amount of asphaltenes and the highest amount of non-hydrocarbons. Moreover, the produced gases contained maximum concentrations of C 1 -C 4 gases (except propane) and had the lowest ethene/ethane ratio and the highest propene/propane and butene/butane ratios. The alkene/alkane gases ratio increased from 0.27 to 0.65 with increasing residence time from 6 to 60 min,

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Effect of hydrotreating conditions on Maya asphaltenes composition and structural parameters

Cited by 52 publications

References 20 publications

Hydrodesulfurization and hydrocracking of Maya crude with P-modified NiMo/Al2O3 catalysts

Hydrodesulfurization and hydrocracking of Maya crude with P-modified NiMo/Al2O3 catalysts

Effect of Heating Rate on Products Yield and Characteristics of Non-Condensable Gases and Shale Oil Obtained by Retorting Dachengzi Oil Shale

Effect of Residence Time on Products Yield and Characteristics of Shale Oil and Gases Produced by Low-Temperature Retorting of Dachengzi Oil Shale

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