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Original coal and stock oil composition for needle coke and for electricity storing carbon material

A technology of raw material composition and petroleum, applied in the direction of circuits, capacitors, coke ovens, etc., can solve the problems of unreachable coke quality, lower thermal expansion coefficient, etc., achieve the effects of suppressing thermal expansion coefficient, improving cycle characteristics, and reducing production costs

Active Publication Date: 2008-12-24
NIPPON OIL CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] However, none of the methods in the above-mentioned patent documents 3-6 may not be able to satisfactorily reduce the thermal expansion coefficient or suppress gas expansion. The actual situation is that the quality of the coke produced by these methods cannot meet the requirements of graphite electrode aggregates used in the electric furnace steelmaking process. Level

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0083] Atmospheric distillation residue (density 0.92g / cm 3 , Sulfur content: 0.35% (mass)) Carry out vacuum distillation under the condition that the temperature at the outlet of the heating furnace is 350°C and the pressure is 1.3kKp, thus producing a saturated A vacuum distillation residue (hereinafter referred to as vacuum distillation residue A) having a content of 61% by mass, a sulfur content of 0.1% by mass and a nitrogen content of 0.3% by mass was obtained.

[0084] Put the vacuum distillation residue A into a test tube, and heat at 500° C. for 3 hours under normal pressure for coking. The coke thus produced was embedded in a commercially available resin and observed through a polarizing microscope. It was found that 15% by mass of damascene structures of 10 μm or smaller were present.

[0085] In addition, the desulfurized vacuum gas oil (sulfur content: 500ppm (mass), density at 15°C: 0.88g / cm 3 ) for fluid catalytic cracking to produce fluid catalytic cracking ...

Embodiment 2

[0097] The vacuum distillation residue A and the fluidized catalytic cracking residue A are mixed in a mass ratio of 6:4 to prepare the raw material composition B. The raw material composition B thus prepared was coked at a pressure of 400 kPa and a temperature of 500° C. for 40 hours, whereby coke (prime coke B) was produced. Operate according to the steps of Example 1, the difference is that a mixture of 1 part (mass) of initial coke B and 2.5 parts (mass) of potassium hydroxide (KOH) is put into a nickel reactor and heated at 750 °C in a nitrogen atmosphere Activated at high temperature for 1 hour to make activated carbon for electric double layer capacitors. The specific surface area, residual potassium and true specific gravity of activated carbon are listed in Table 1 below. Using the same procedure as in Example 1, an electric double layer capacitor was fabricated using this activated carbon. The electrostatic capacity and cycle characteristics (capacitance retention ...

Embodiment 3

[0105] The vacuum distillation residue A and the fluidized catalytic cracking residue A are mixed at a mass ratio of 1:1 to prepare a raw material composition C. Raw material composition C was put into a test tube and heated at a pressure of 400 kPa and a temperature of 500° C. for 40 hours for coking. The prime coke C thus generated was embedded in a commercially available resin and observed with a polarizing microscope. As a result, it was found that 3.5% by mass of mosaic structures of 10 µm or smaller were present.

[0106] The prime coke C was calcined at 1000° C. for 5 hours to produce calcined coke (needle coke). Table 2 shows the sulfur and nitrogen contents and bulk specific gravity of the segment char thus produced.

[0107] The section char is mixed with 30% (mass) of coal-based binder pitch and formed into columnar granules through an extruder. The columnar particles were calcined in a muffle furnace at 1000° C. for 1 hour, and then the coefficient of thermal ex...

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Abstract

A stock oil composition as a stock oil for production of needle coke or for production of an active carbon for electric double layer capacitor electrode, comprising a first heavy oil of 300 DEG C or higher initial boiling point, 12 mass percent or less asphaltene contents, 50 mass percent or more saturated contents and 0.3 mass percent or less sulfur contents as obtained by vacuum distillation ofpetroleums as residual oil and a second heavy oil of 150 DEG C or higher initial boiling point and 0.5 mass percent or less sulfur contents as obtained by fluid catalytic cracking of hydrocarbon oil.

Description

field of invention [0001] The present invention relates to raw material composition and initial coke for producing electricity storage carbon material and needle coke. More particularly, the present invention relates to raw material compositions and initial cokes capable of providing activated carbon suitable for producing electrodes of electric double layer capacitors in which residual alkali metals are easily removed. The invention also relates to a raw material composition and initial coke suitable for producing needle coke. Background of the invention [0002] In recent years, carbon materials have been widely used in the field of electricity storage. Among the carbon materials for electricity storage, activated carbon with a larger surface area is used as an electrode of an electric double-layer capacitor, while coke with a smaller surface area is used as a cathode for a lithium-ion battery. In particular, electric double-layer capacitors have attracted attention beca...

Claims

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Application Information

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IPC IPC(8): C01B31/02C08L91/00H01G9/058C10B53/00C10B57/04
Inventor 大山隆中西和久田野保东启二藤永逸平桥坂博光竹下究藤井政喜尾野秀树
Owner NIPPON OIL CO LTD
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