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Iron-zinc-based composite lignin activated carbon desulfurizer and preparation method thereof

A technology of lignin and activated carbon, applied in the direction of separation methods, chemical instruments and methods, alkali metal compounds, etc., can solve the problems of high investment cost, high cost, difficult to handle products, etc., and achieve the effect of increasing economic benefits

Active Publication Date: 2017-07-07
FUZHOU UNIV
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Problems solved by technology

[0002] At present, there are three main methods of flue gas desulfurization agent: one is the combustion sulfur fixation method, which is to add a certain amount of sulfur fixer to the coal, so that the sulfur dioxide generated when the coal is burned reacts with the sulfur fixer to form sulfate and slag The cost of this method is relatively high; the other method is wet desulfurization, which mainly uses the spray method to absorb sulfur dioxide in the flue gas with an alkaline aqueous solution. This method consumes a lot of water, and the product after desulfurization is difficult to handle and easy Secondary pollution, high investment cost, large floor area and high anti-corrosion requirements for equipment; there is another method is activated carbon adsorption method, which has a short service life of activated carbon, complicated regeneration and low desulfurization efficiency, and water washing consumes The large amount of water is easy to cause secondary pollution, and the price of activated carbon is high, which increases the cost of desulfurization

Method used

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preparation example Construction

[0042] A preparation method of an iron-zinc-based composite lignin activated carbon desulfurizer, comprising the steps of:

[0043] S1. Preparation of lignin activated carbon: Weigh the masson pine papermaking black liquor according to measurement, add concentrated phosphoric acid for mixing, then adjust the temperature of the mixed solution system to 55-90°C for constant temperature reaction for 8-16 hours, then place the mixed solution in In a tube furnace, the mixed solution is calcined and carbonized at a temperature of 400-800°C for 5-10 hours in a nitrogen atmosphere, and then lignin activated carbon can be prepared;

[0044] S2. Composite reaction: Weigh the lignin activated carbon prepared above and dissolve it in the zinc salt solution, then add the iron salt solution and surfactant in sequence for a mixed reaction for 0.5-2 hours. After the reaction is completed, put Add the mixed solution into the ultrasonic equipment for ultrasonic mixing reaction for 2 to 4 hours....

Embodiment 1

[0049] A preparation method of an iron-zinc-based composite lignin activated carbon desulfurizer, comprising the steps of:

[0050] S1. Preparation of lignin activated carbon: Take 300 parts of masson pine papermaking black liquor with a solid content of 45%, add 50 parts of concentrated phosphoric acid at a feeding ratio of 6:1 for mixing, and then adjust the temperature of the mixed solution system to 55°C for constant temperature After reacting for 8 hours, the mixed solution was placed in a tube furnace, and the mixed solution was calcined and carbonized at a temperature of 400° C. for 5 hours under a nitrogen atmosphere, and lignin activated carbon could be prepared;

[0051] S2. Composite reaction: Take 300 parts of the lignin activated carbon prepared above and dissolve it in 55 parts of zinc nitrate solution, then add 100 parts of ferric nitrate solution and 1 part of sodium dodecylbenzenesulfonate to mix React for 0.5h. After the reaction is completed, add the mixed s...

Embodiment 2

[0057] A preparation method of an iron-zinc-based composite lignin activated carbon desulfurizer, comprising the steps of:

[0058] S1. Preparation of lignin activated carbon: Take 420 parts of masson pine papermaking black liquor with a solid content of 60%, add 60 parts of concentrated phosphoric acid at a feeding ratio of 7:1 for mixing, and then adjust the temperature of the mixed solution system to 70°C for constant temperature After reacting for 16 hours, the mixed solution was placed in a tube furnace, and the mixed solution was calcined and carbonized at a temperature of 600° C. for 10 hours under a nitrogen atmosphere, and lignin activated carbon could be prepared;

[0059] S2. Composite reaction: take 200 parts of lignin activated carbon prepared above and dissolve it in 60 parts of zinc acetate solution, then add 130 parts of iron oxalate solution and 8 parts of cetyltrimethylammonium bromide in sequence Carry out mixing reaction 1h, after reaction is finished, join...

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Abstract

The invention discloses an iron-zinc-based composite lignin activated carbon desulfurizer and a preparation method thereof. Lignin extracted from masson pine papermaking black liquid is carbonized and activated to obtain lignin activated carbon, lignin activated carbon is dissolved in a zinc salt solution, an iron salt solution and a surfactant are added for reacting for 0.5-2 hours, then an alkaline solution with certain concentration is used for a titration mixed ultrasonic reaction for 2-4 h, a high-pressure reaction still is used for controlling the temperature to range from 100-200 DEG C for reacting for 8-24 h, and the iron-zinc-based composite lignin activated carbon desulfurizer is prepared. The desulfurizer is simple in preparation technological process and good in desulfurization effect, the precision of activated carbon desulfurization is improved through iron-zinc-based composite lignin activated carbon, and high temperature can be resisted. By the adoption of the lignin extracted from the papermaking black liquid, it is truly achieved that waste is turned into wealth, and practical use value and social value are achieved.

Description

technical field [0001] The invention relates to a preparation method of metal salt modified activated carbon, in particular to a preparation method of an iron-zinc-based composite lignin activated carbon desulfurizer. Background technique [0002] At present, there are three main methods of flue gas desulfurization agent: one is the combustion sulfur fixation method, which is to add a certain amount of sulfur fixer to the coal, so that the sulfur dioxide generated when the coal is burned reacts with the sulfur fixer to form sulfate and slag The cost of this method is relatively high; the other method is wet desulfurization, which mainly uses the spray method to absorb sulfur dioxide in the flue gas with an alkaline aqueous solution. This method consumes a lot of water, and the product after desulfurization is difficult to handle and easy Secondary pollution, high investment cost, large floor area and high anti-corrosion requirements for equipment; there is another method is ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/22B01J20/28B01J20/30B01D53/02
Inventor 罗鑫刘明华王晖强陈菲儿许建平范亚茹
Owner FUZHOU UNIV
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