A kind of preparation method of honeycomb shaped activated carbon
A technology of forming activated carbon and honeycomb, which is applied in the field of preparation of honeycomb-shaped activated carbon, can solve the problems of reduced adsorption capacity of activated carbon, clogging of adhesives, etc., and achieves the effects of low working wind resistance, good strength and high specific surface area.
Active Publication Date: 2018-05-01
广东韩研活性炭科技股份有限公司
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Problems solved by technology
[0003] Ordinary honeycomb activated carbon on the market mainly uses medium activated carbon powder and wood activated carbon powder as raw materials, adding binders for molding, drying, sintering, etc. The adsorption pores of honeycomb activated carbon produced by this process are easily blocked by the adhesive, resulting in the failure of activated carbon. The adsorption capacity is greatly reduced, the highest adsorption value of iodine can reach 500mg / g, and the adsorption value of methylene blue is almost no
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[0030] The main process of the present invention is: adding phosphoric acid to sawdust - kneading - adding tar - extrusion molding - activation - washing - drying - finished product, the process flow is as follows figure 1 shown.
[0031] The specific method is as follows:
[0032] 1) Mix Chinese fir sawdust (ground to 40 mesh) and phosphoric acid with a mass percentage concentration of 20% to 60% according to the mass ratio of wood phosphorus ratio of 1: (1 to 2), and knead for 1.5 hours;
[0033] 2) Add industrial coal tar and knead again for 1 hour, wherein the amount of tar added is 3% to 10% of the mass of sawdust;
[0034] 3) Carry out extrusion molding;
[0035] 4) Carbon activation at 300-550°C for 1-3 hours;
[0036] 5) Acid recovery, washing and extracting recovery, drying, and packaging of finished products to prepare honeycomb-shaped activated carbon.
[0037] The present invention will be further described below in conjunction with specific examples, but not l...
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Abstract
The invention discloses a preparation method of a honeycomb shaped moulded active carbon. The preparation method comprises the following steps: mixing wood chips and a phosphoric acid solution according to a mass ratio of 1: (1-2), kneading the mixture for 1 to 3 hours; adding a binder, kneading the mixture for 0.8 to 2 hours; carrying out extrusion moulding; activating the carbon for 1 to 3 hours at a temperature of 300 to 550 DEG C to prepare honeycomb shaped moulded active carbon. The honeycomb shaped moulded active carbon has the advantages that the pores will not be obstructed by tar, because added tar is converted into active carbon during the activation process, and the active carbon has a large specific surface area and high strength. The active carbon can effectively remove macro-molecules, medium-molecules, and micro-molecules in organic waste gas. The waste adsorption efficiency is improved by 40%, compared with that of conventional honey shaped active carbon, the iodine adsorption valve can reach 1050 mg / g at most, the methylene blue adsorption value can reach 10 mL / 0.1 g at most, and the active carbon can be widely used in industries such as waste gas processing, waste gas recovery, and the like.
Description
technical field [0001] The invention belongs to the field of activated carbon, and in particular relates to a preparation method of honeycomb shaped activated carbon. Background technique [0002] Most of the activated carbon produced by carbonization and activation is in powder or granular form. Although powdered activated carbon has excellent adsorption performance, it cannot be used in the treatment of waste gas, while granular activated carbon has a large wind resistance and difficult desorption after filling. The honeycomb activated carbon has a unique honeycomb structure, high porosity, uniform gas distribution, larger geometric area, shorter diffusion distance, wear resistance, and strong dust pollution resistance. Compared with other types of activated carbon, the biggest advantage of honeycomb activated carbon is the small pressure loss. Therefore, honeycomb activated carbon has become the focus of research. The development of honeycomb activated carbon was first ...
Claims
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IPC IPC(8): C01B32/342
CPCC01P2006/21
Inventor 韩初榆崔国强
Owner 广东韩研活性炭科技股份有限公司