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Petroleum coke-based activated carbon and preparation method thereof

A technology of activated carbon and petroleum coke, applied in chemical instruments and methods, carbon compounds, inorganic chemistry, etc., can solve the problems of low activation yield, high production cost, and wide pore size distribution of activated carbon

Active Publication Date: 2020-07-07
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the alkali coke used in the production process of the above method is relatively large, the production cost is high, and it will also cause serious environmental pollution problems, and the activation yield is low, the carbon consumption is large, and the obtained activated carbon has a wide pore size distribution. limited range

Method used

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  • Petroleum coke-based activated carbon and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Weigh 50g of ammonium phosphate, dissolve it in 200mL of deionized water to obtain solution A; grind 100g of petroleum coke into powder, then add it to solution A, let it stand for 1.5h, then filter, and put the obtained solid sample in an oven at 110°C Dry for 5h. At 200°C, use a mixed gas with a volume ratio of water vapor and nitrogen of 1:2 to pretreat the dried solid sample for 3 h (the volumetric space velocity of the mixed gas is 800 h -1 ), then raise the temperature to 400°C, continue pretreatment for 3h, and then cool to 60°C under nitrogen protection to obtain pretreated petroleum coke.

[0034] Mix 100 g of the pretreated petroleum coke obtained above with 300 g of sodium hydroxide evenly, place in a tube furnace, and raise the temperature to 800° C. for 40 min in a nitrogen atmosphere to activate.

[0035]Grind the above-mentioned activated sample into powder, weigh it, add it to the acetic acid solution with a concentration of 30wt% according to the mass ...

Embodiment 2

[0037] Take 50g of ammonium phosphate and dissolve it in 200mL of deionized water to obtain solution A; grind 100g of petroleum coke into powder, then add it to solution A, let it stand for 1.5h, then filter, and put the obtained solid sample in an oven to dry at 100°C 6h. At 200°C, use a mixed gas with a volume ratio of water vapor and argon of 1:5 to pretreat the dried solid sample for 3 h (the volumetric space velocity of the mixed gas is 1200 h -1 ), then raise the temperature to 400°C, continue pretreatment for 3h, and then cool to 60°C under nitrogen protection to obtain pretreated petroleum coke.

[0038] Mix 100g of the pretreated petroleum coke obtained above with 300g of potassium bicarbonate evenly, place it in a microwave heating furnace with a microwave frequency of 2450MHz, and raise the temperature to 900°C for 20min in a nitrogen atmosphere under the condition of a microwave power of 0.3kw.

[0039] Grind the above-mentioned activated sample into powder, weigh...

Embodiment 3

[0041] Weigh 50g of ammonium phosphate, dissolve it in 200mL of deionized water to obtain solution A; grind 100g of petroleum coke into powder, then add it to solution A, let it stand for 1.5h, then filter, and put the obtained solid sample in an oven at 110°C Dry for 5h. At 200°C, pretreat the dried solid sample with water vapor for 3 hours (the volumetric space velocity of the water vapor gas is 1200 hours -1 ), then raise the temperature to 400°C, continue pretreatment for 3h, and then cool to 60°C under nitrogen protection to obtain pretreated petroleum coke.

[0042] Mix 100g of the pretreated petroleum coke obtained above with 300g of potassium hydroxide evenly, place it in a microwave heating furnace with a microwave frequency of 2450MHz, vacuumize it, and raise the temperature to 500°C under the condition of a microwave power of 0.3kw, and keep it constant for 40min. Then nitrogen gas was introduced to normal pressure, and the temperature was raised to 800° C. for 20 ...

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Abstract

The invention discloses petroleum coke-based activated carbon and a preparation method thereof. The activated carbon has a specific surface area of 2000-3500m<2> / g, a pore volume of 0.8-1.5 cm<3> / g, an iodine adsorption value of 2000-3000mg / g and a methylene blue adsorption value of 300-650mg / g. The preparation method comprises the following steps: introducing ammonium phosphate into petroleum coke, drying and then pretreating; mixing the obtained sample with an activating agent, activating after uniformly mixing, and finally washing and drying to obtain the activated carbon. The activated carbon has the advantages of high specific surface area, high pore volume, centralized pore size distribution, excellent adsorption performance and the like, and is low in production cost and small in environmental pollution.

Description

technical field [0001] The invention relates to a carbon material and a preparation method thereof, in particular to a method for preparing activated carbon by using petroleum coke as a raw material. Background technique [0002] Petroleum coke is the product of the delayed coking unit in the refinery. It has the characteristics of high calorific value, high water content and low volatile matter. Its output is about 25% to 30% of the coking feedstock oil. With the further development of delayed coking technology, how to solve the effective utilization of petroleum coke to increase the added value of petroleum coke is a difficult problem. The preparation of activated carbon from petroleum coke is one of the effective ways to increase the value of petroleum coke in recent years. [0003] Activated carbon is an environment-friendly purification material. Due to its unique pore structure and surface functional groups, it can be widely used in various fields such as industry, ag...

Claims

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Application Information

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IPC IPC(8): C01B32/33C01B32/348C01B32/342
CPCC01B32/33C01B32/348C01B32/342Y02E60/13
Inventor 张舒冬宋永一孙晓丹张庆军刘继华方向晨
Owner CHINA PETROLEUM & CHEM CORP
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