Purification of ultralow sulfur diesel fuel

Inactive Publication Date: 2010-06-24
LYONDELL CHEM TECH LP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0006]The invention is a method for purifying an ultralow sulfur diesel fuel which contains polycyclic aromatic color bodies. The method comprises contacting the ULSD in the liquid phase with a coal-based activated carbon adsorbent having a surface area ranging from 800 to 1500 m2/g and pores having a pore size greater than 20 Å, and recovering a purified diesel product having a decreased color bodies content. The invention also includes a process for extending the life of a supported hydrodesulfuriz

Problems solved by technology

The presence of sulfur compounds in diesel fuel is undesirable as they result in a serious pollution problem.
Combustion of diesel fuel containing these sulfur impurit

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

Adsorption Runs with Coal-Based Activated Carbon Compared to Wood-Based Carbon

[0022]ULSD (56-58 g) having a color in solution of 2.9, as measured by ASTM D 6045, is placed in a 250-mL beaker. A coal-based carbon adsorbent (Calgon CAL® 12×40 granulated activated carbon, having surface area between 800 to 1500 m2 / g, and a molasses number of 230 min.) or a wood-based carbon adsorbent (NORIT® Darco G 60 / 80), in varying amounts for each adsorption run, is placed in the beaker and the mixture is stirred overnight. The adsorbent is filtered (with a Buchner funnel, 3 micron filter paper) and the final equilibrium color is measured according to ASTM D 6045. The results of Examples 1A-1D using Calgon® CAL 12×40 adsorbent and Comparative Examples 1E-1H using Darco G 60 / 80 adsorbent are shown in Table 1.

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PUM

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Abstract

The invention is a method of purifying an ultralow sulfur diesel fuel which contains polycyclic aromatic color bodies. The method comprises contacting the ULSD fuel in the liquid phase with a coal-based activated carbon adsorbent having a surface area ranging from 800 to 1500 m2/g and containing pores having pore size greater than 20 Å, and recovering a purified diesel product having a decreased color bodies content.

Description

FIELD OF THE INVENTION[0001]This invention relates to the purification of an ultralow sulfur diesel fuel.BACKGROUND OF THE INVENTION[0002]The presence of sulfur compounds in diesel fuel is undesirable as they result in a serious pollution problem. Combustion of diesel fuel containing these sulfur impurities results in the release of sulfur oxides which are noxious and corrosive. Federal legislation, specifically the Clean Air Act of 1964 as well as the amendments of 1990 and 1999, has imposed increasingly more stringent requirements to reduce the amount of sulfur released to the atmosphere. As a result, the United States Environmental Protection Agency lowered the sulfur standard for diesel fuel to 15 parts per million by weight (ppmw), effective in 2006.[0003]The most common method of removing sulfur from diesel fuel is hydrodesulfurization, in which the diesel fuel is reacted with hydrogen gas at elevated temperature and high pressure in the presence of a catalyst. See, for exampl...

Claims

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Application Information

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IPC IPC(8): C10G45/00C10G29/00
CPCC10G25/003C10G2400/04C10G67/06C10G45/02
Inventor KAMINSKY, MARK P.LEYSHON, DAVID W.JUTTU, GOPALAKRISHANQUAKENBUSH, ALLEN B.CANDELA, LAWRENCE M.
Owner LYONDELL CHEM TECH LP
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