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Method for upgrading an oil, a fuel product and a hydrocarbon product fraction

a technology of hydrocarbon product and oil, which is applied in the direction of hydrocarbon dewatering, separation processes, fuels, etc., can solve the problems of cumbersome upgrading of pyrolysis oil in refinery equipment, unsatisfactory stability of such emulsion, and disadvantages of water and oxygenated compounds in pyrolysis oil for the caloric value of pyrolysis oil

Inactive Publication Date: 2013-05-02
SHELL OIL CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The present invention relates to a method for upgrading pyrolysis oil to produce a fuel oil that can be used for marine and stationary applications or as a feedstock for hydrocarbon conversion processes. The method involves mixing pyrolysis oil with a high boiling hydrocarbon, such as asphaltenes, to improve its stability. The upgraded pyrolysis oil has improved stability and can be blended with other fuel oil components. This invention allows for the efficient use of pyrolysis oil as a fuel oil and expands the options for upgrading and utilizing this valuable resource.

Problems solved by technology

The presence of water and oxygenated compounds in the pyrolysis oil is disadvantageous for the caloric value of the pyrolysis oil.
However, upgrading the pyrolysis oil in refinery equipment can be cumbersome due to its high water content, the presence of organic acids, and incompatibility with hydrocarbon liquids.
For the purpose of using pyrolysis oil as a fuel component, it has been proposed to improve the compatibility with hydrocarbons by forming emulsions with the help of an emulsifier, but there are instances that the stability of such emulsion has been found unsatisfactory.
However, the removal of water from the pyrolysis oil by evaporation has led to undesirable results, such as the formation of a highly viscous, tar like material, which could not readily be dissolved in a hydrocarbon liquid.

Method used

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Examples

Experimental program
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Effect test

examples 1-4

[0056]A pyrolysis oil originating from pine forest residue and having a water content of about 22% wt, obtained from Technical Research Centre of Finland (VTT), was combined and mixed with a high boiling hydrocarbon mixture. The high boiling hydrocarbon mixture in examples 1 to 3 was a Kuwait Long Residue (further abbreviated as KLR). This Kuwait Long Residue further had a Total Acid Number of about 0.14 mg KOH / g. The high boiling hydrocarbon mixture in example 4 was a Saudi Arabian Short Residue (further abbreviated as SASR). The resultant mixture was placed in a round-bottom flask of a standard laboratory rotary evaporator. After attaching the flask to the rotary evaporator, an oil bath was placed around the flask and heated to 110° C. or 90° C., while the flask was allowed to rotate. The pressure inside the rotary evaporator was carefully lowered to 0.5 kPa (5 millibar), i.e. such that sudden boiling of the mixture was prevented (for this purpose, additionally some glass beads ha...

example 5

[0061]In a manner as set out in Examples 1-4, a de-watered pyrolysis oil mixture was obtained from a mixture comprising 51.84 g of the same pyrolysis oil and 206.97 g of a blend comprising 170.66 g of a vacuum gas oil and 36.31 g of a Kuwait Long Residue (KLR). The Kuwait Long Residue had an initial boiling point above 350° C. and an asphaltene content of 4.2% wt. This Kuwait Long Residue further had a Total Acid Number of about 0.14 mg KOH / g. The temperature of the oil bath was 110° C. The water content of the de-watered pyrolysis oil mixture was 0.09% wt. A sample of the de-watered pyrolysis oil mixture was subjected to catalytic cracking in a small-scale fluidized catalytic cracking reactor. A commercial equilibrium catalyst comprising ultra stable zeolite Y (USY) in an amorphous alumina matrix was used as the cracking catalyst. The cracking catalyst to oil ratio used was 4.31 to achieve 60% conversion. The reaction temperature was kept at 520° C. and the pressure was kept at 120...

example 6

[0063]In a manner as set out in Examples 1-4, using an oil bath temperature of 110° C., a de-watered pyrolysis oil mixture was obtained from a mixture comprising 10% wt of the same pyrolysis oil and 90% wt of a blend comprising 82.5% wt of a vacuum gas oil and 17.5% wt of the Kuwait Long Residue (KLR) of Example 5.

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Abstract

Pyrolysis oil is upgraded by evaporating water from a mixture of the pyrolysis oil and a hydrocarbon having an atmospheric boiling point of at least 130° C. The method yields a de-watered pyrolysis oil mixture.

Description

[0001]This present application claims the benefit of European Patent Application No. 11187325.3, filed Oct. 31, 2011, and PCT / EP2012 / 071607, filed Oct. 31, 2012, the entire disclosure of which is hereby incorporated by reference.FIELD OF THE INVENTION[0002]The invention relates to a method for upgrading of a pyrolysis oil. The method also relates to a fuel product based on the upgraded pyrolysis oil and a hydrocarbon product fraction based on the upgraded pyrolysis oil.BACKGROUND OF THE INVENTION[0003]With a diminishing supply of crude oil, the use of renewable energy sources will be increasingly important as a feedstock for processes for the production of liquid and gaseous fuels, for example transportation fuels and fuels for stationary applications. The use of biomass for the production of fuels has an advantage of improving the CO2 balance, compared to the use of crude oil.[0004]Existing processes for the conversion of plant biomass include the step of pyrolysing the lignocellul...

Claims

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Application Information

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IPC IPC(8): C10G7/04C10G55/06C10L1/04
CPCC10G7/04C10G2300/1014C10G2300/202C10G2300/302C10G2300/206C10G2300/301C10G2300/203Y02P30/20
Inventor DIJS, IVO JOHANNESNIEUWHOF, ARJENHAAN, JOHANNES PIETERBUS, KARIN
Owner SHELL OIL CO
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