Subject: Iodine value of activated carbon
Content: In the basic appearance of absorption, molecular layouts of different sizes/uses attract physics to different upper parts with different kinetic energy. coal activated carbon pellets  Chemists use different molecular layouts to accurately measure and simulate absorption in similar ways.   Since iodine is very small, this is an excellent indicator of the ease of use of activated carbon in very small/dense pores. The iodine value matches the iodine balance of the activated carbon, and the iodine absorption is related to the porosity promotion of the activated carbon, and is used as a common performance parameter.   Due to its portability and fast inspection of catalyst carrier character, iodine value is an important parameter commonly used in activated carbon inspection. It got the predicted value of its area and good porosity. According to the example of ASTM D4607, when the residual concentration of iodine is 0.02N (0.01molL-1), the iodine value is defined as the mg mg absorbed by 1 gram of raw material, which is based on the three-point isotherm.   The sample is handled with 10mL5%(v/V)HCl. The compound was boiled for 30 seconds and then cooled at room temperature. Immediately, 100 mL of 0.1N iodine aqueous solution was added to the compound and stirred for 30 seconds. Then the aqueous solution was filtered, and using ingots (or tapioca starch) as an indicator, 50 mL leachate was bureted with 0.1N (0.05molL-1) sodium thiosulfate aqueous solution.   Use the logarithmic axis to plot the amount of iodine absorbed by 1 gram of the catalyst carrier and the concentration of residual iodine. Assuming that the residual iodine concentration value is not within the limit of (0.008-0.04N), use different carbon grades to repeat the whole process for each isothermal point. Do the analysis at three points, and when the residual iodine concentration is 0.02N, calculate the iodine value as the absorbed amount.