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Preparation method for cleaning diesel oil

A diesel and clean technology, applied in the preparation of refined hydrocarbon oil, liquid hydrocarbon mixture, petroleum industry, etc., to achieve the effect of meeting environmental protection and improving economic benefits

Active Publication Date: 2008-03-19
CHNA ENERGY INVESTMENT CORP LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

So far, there has been no report on the method of preparing Euro III or above diesel oil from coal direct liquefied diesel fraction and coal indirect liquefied diesel fraction as raw materials

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] The main process parameters of the direct coal liquefaction unit and the indirect coal liquefaction unit used in the test are shown in Table 1. A fixed-bed hydrorefining reactor filled with RN-10 catalyst is used to hydrotreat coal direct liquefaction oil. The properties of the obtained hydrorefined coal direct liquefaction diesel fraction are shown in Table 2. The main physical and chemical properties of the diesel fraction produced by the indirect coal liquefaction unit are also shown in Table 2.

[0024] The indirect coal liquefied diesel fraction accounts for 35% by weight and the direct coal liquefied diesel fraction after hydro-upgrading accounts for 65% by weight. The properties of the obtained diesel products are shown in Table 2.

[0025] It can be seen from Table 2 that when the mixing weight ratio of the indirect coal liquefied diesel fraction is 35%, the diesel product produced by the method of the present invention has a cetane number of 52 and a density of 0.8...

Embodiment 2

[0031] In this example, the same hydrorefined coal direct liquefied diesel fraction and coal indirect liquefied diesel fraction were used for the experiment. The mixing ratio of the above two diesel fractions was changed so that the direct coal liquefied diesel fraction and the indirect liquefied diesel fraction each accounted for 50wt%. The properties of the obtained mixed diesel products are shown in Table 3.

[0032] It can be seen from Table 3 that when the mixing weight ratio of the indirect coal liquefied diesel fraction is 50%, the cetane value of the coal liquefied mixed diesel product is 58 and the density is 0.825g / cm 3 , The sulfur content is less than 10ppm, and the nature meets the requirements of Euro IV emission standards.

[0033] table 3

[0034] Analysis Project

Embodiment 3

[0036] The main process parameters of the direct coal liquefaction and indirect liquefaction units are the same as in Table 1. The fixed-bed hydrorefining reactor filled with RN-10 catalyst is used to hydrotreat the direct coal liquefied oil, but the direct coal liquefied oil hydrorefining is used The main process parameters are shown in Table 4. It can be seen from Table 4 that this embodiment adopts more gentle hydrorefining operating conditions, and the properties of the obtained hydro-upgraded coal direct liquefied diesel fraction are shown in Table 5. It can be seen from Table 5 that the cetane number of the diesel fraction of the direct coal liquefaction product is lower. According to the ratio of coal indirect liquefied diesel fraction to 40wt% and coal direct liquefied diesel fraction to 60wt%, the properties of the resulting diesel product are shown in the table 5.

[0037] It can be seen from Table 5 that when the mixing weight ratio of the indirect coal liquefied diesel...

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Abstract

A method for preparing clean diesel oil includes mixing diesel oil fraction produced by hydrorefining of direct coal liquefied oil and indirect coal liquefied diesel oil fraction, wherein the indirect coal liquefied diesel oil fraction is 25-80wt percent of mixed diesel oil products. The density range of the diesel oil fraction, prepared by the method of the invention, is in the range from 0.820g / cm3-0.860g / cm3, the cetane number is in the range of 52-60, the sulfur content is less than 10ppm, and other properties also can meet the requires for Euro-III or Euro-IV diesel oil standard, so as to produce high grade diesel oil products through direct coal liquefaction and indirect coal liquefaction.

Description

Technical field [0001] The invention relates to a method for preparing clean diesel, more specifically, a method for preparing diesel fuel above Euro III by using coal direct liquefaction diesel fraction and coal indirect liquefaction diesel fraction as raw materials. Background technique [0002] Due to the need for environmental protection, countries around the world have formulated more stringent fuel specifications, requiring oil refineries to produce environmentally friendly fuel oil with good performance and low emissions of toxic and hazardous substances. As far as diesel is concerned, the major changes in specifications are the sulfur content, aromatic content, cetane number and density. Due to the large number of diesel vehicles in the European Union and the strictest emission regulations, the European Union implemented Euro IV emission standards for diesel-engine vehicles in 2004. For this reason, a new diesel quality standard EN590-2004 was formulated, which requires t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G45/00C10G1/00
Inventor 任相坤门卓武石玉林金嘉璐高聚忠黄剑薇
Owner CHNA ENERGY INVESTMENT CORP LTD
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