Method for improving adsorption of activated carbon to low-concentration formaldehyde
A kind of activated carbon adsorption and activated carbon technology, applied in the field of air purification, can solve the problems of easy desorption, poor stability, high cost, etc., and achieve the effect of high removal rate
Inactive Publication Date: 2016-12-07
BAOHUSAN ENVIRONMENTAL PROTECTION SCI & TECH CHENGDU
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Abstract
The invention discloses a method for improving adsorption of activated carbon to low-concentration formaldehyde. The method comprises the following steps of 1 oxidizing, wherein activated carbon is soaked with a hydrogen peroxide solution with the volume concentration of 10% to 15% through ultrasonic oscillation for 1 h to 1.5 h and then filtered and dried for standby application; 2 modification treating, wherein the oxidized activated carbon is added into a CuCl2 and CuSO4 mixed solution with the molar concentration of 1.5 mol/L to 2.5 mol/L to be soaked for 7 h to 9 h at the temperature of 35 DEG C to 40 DEG C through ultrasonic oscillation, and the molar ratio of CuCl2 to CuSO4 is 1:1; 3 drying, wherein the activated carbon subjected to modification treating is filtered and naturally air-dried; 4 calcining under N2 protection, wherein the dried activated carbon is calcined for 1.5 h to 2.5 h at the temperature of 300 DEG C to 400 DEG C, calcined for 1 h to 2 h at the temperature of 400 DEG C to 500 DEG C and calcined for 0.5 h to 1 h at the temperature of 500 DEG C to 600 DEG C. The treated activated carbon has the high removal rate on formaldehyde.
Application Domain
Gas treatmentOther chemical processes +1
Technology Topic
ChemistryUltrasonic oscillation +6
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