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Raw coal for making carbonaceous material for electricity storage or needle coke

A raw coke and activated carbon technology, which is applied in circuits, capacitors, coke ovens, etc., can solve the problems of coke quality, lower thermal expansion coefficient or suppress uplift, etc., achieve cycle characteristics improvement, thermal expansion coefficient suppression, and high industrial value Effect

Active Publication Date: 2009-01-14
NIPPON OIL CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] However, any of the methods described in Patent Documents 3-6 are not necessarily sufficient to lower the coefficient of thermal expansion or suppress doming and the reality is that the quality of coke produced by these methods has not yet reached the level required for aggregates of graphite electrodes used in the electric furnace steel manufacturing process. required level

Method used

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  • Raw coal for making carbonaceous material for electricity storage or needle coke
  • Raw coal for making carbonaceous material for electricity storage or needle coke

Examples

Experimental program
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Effect test

Embodiment 1

[0099] (1) Preparation of raw material composition

[0100]In the presence of a Ni-Mo catalyst, hydrodesulfurization of atmospheric distillation residual oil from Middle East origin with a sulfur content of 2.5% by mass so that the hydrocracking rate is 25% or less, thereby producing desulfurized heavy oil (hereinafter referred to as "hydrodesulfurized oil A") ""). At a total pressure of 22MPa, a hydrogen partial pressure of 20MPa, a temperature of 380°C, a hydrogen / oil ratio of 590NL / L and a liquid hourly space velocity (LHSV) of 0.17h -1 Under the conditions of hydrodesulfurization.

[0101] Using vacuum distillation residue and desulfurized vacuum gas oil as raw materials and using platinum (Pt)-supported silica-alumina catalyst at a reaction temperature of 520 °C, a total pressure of 0.2 MPa and a catalyst / oil ratio of 7 The contact time was 3 seconds to prepare fluid catalytic cracking residual oil (hereinafter referred to as "fluid catalytic cracking residual oil ZA")....

Embodiment 2

[0113] Atmospheric distillation bottom oil having a sulfur content of 3.0% by mass was vacuum distilled under the condition that the furnace outlet temperature was 360°C and the pressure was 1.3 kPa, thereby preparing vacuum distillation bottom oil A having an initial boiling point of 410°C, 8% by mass Bitumen content, 50% by mass saturate content, 0.1% by mass sulfur content and 0.3% by mass nitrogen content.

[0114] The prepared vacuum distillation residue A was mixed with the hydrodesulfurized oil A and fluid catalytic cracking residue A prepared in Example 1 so that the content of the former was 30% by mass, thereby preparing a raw material composition B.

[0115] The prepared raw material composition B was coked under nitrogen at a pressure of 400 kPa and a temperature of 500° C. for 40 hours, thereby producing a coke (raw coke B). The prepared raw coke B was heated under nitrogen at a temperature of 2800° C., thereby preparing a graphitized product. The graphitized pro...

Embodiment 3

[0128] (1) Preparation of raw material composition

[0129] Atmospheric distillation bottom oil having a sulfur content of 3.5% by mass was hydrodesulfurized in the presence of a Ni-Mo catalyst so that the hydrocracking rate was 30% or less, thereby producing desulfurized heavy oil (hereinafter referred to as "hydrodesulfurized oil B") . At a total pressure of 18.5MPa, a hydrogen partial pressure of 16.5MPa, a temperature of 370°C, a hydrogen / oil ratio of 590NL / L and a liquid hourly space velocity (LHSV) of 0.17h -1 Under the conditions of hydrodesulfurization. The prepared hydrodesulfurized oil B had an initial boiling point of 260°C, a sulfur content of 0.3% by mass, a nitrogen content of 0.1% by mass, a bitumen content of 2% by mass and a saturate content of 70% by mass.

[0130] This hydrodesulfurized oil B was put into a test tube and heated at a temperature of 500° C. for 3 hours under atmospheric pressure to coke it. The prepared focal was embedded in a commercially ...

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Abstract

A raw coal having such a structure that the product obtained by graphitizing the raw coal in an inert gas atmosphere at 2800 DEG C has crystallite size / lattice constant ratios of 360 or below in (002) plane and 1500 or below in (110) plane is provided either as a raw coal capable of giving, through alkali activation followed by washing, active carbon which is reduced in residual alkali content and permits simplified operation in the washing since washing fluid in the washing can go in and out of active carbon easily, or as a raw coal for making needle coke.

Description

technical field [0001] The invention relates to raw coke for preparing storage carbon materials and needle coke. In particular, the present invention relates to raw coke which provides activated carbon suitable for the preparation of electrodes of double layer capacitors from which residual alkali metals can be easily removed. The invention also relates to raw coke suitable for preparing needle coke. Background technique [0002] In recent years, carbon materials have been widely used in the field of electricity storage. Among such electricity storage carbon materials, activated carbon having a larger surface area is used as an electrode of an electric double layer capacitor, while coke having a smaller surface area is used as a negative electrode of a lithium ion secondary battery. Specifically, electric double layer capacitors have drawn attention because they can be used as backup power sources, auxiliary power sources, etc., and in this regard, various developments hav...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/02C01B31/08H01G9/058C08L91/00C10B45/02C10B53/00C10B57/04
CPCY02E60/13
Inventor 大山隆中西和久田野保东启二藤永逸平桥坂博光藤井岁隆野吕隆坂本明男竹下究猪饲庆三藤井政喜尾野秀树
Owner NIPPON OIL CO LTD
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