铁络合物热解法制备磁性活性炭的条件研究_化学系.rar

摘要:本课题采用热分解法制备磁性活性炭，根据不同的含铁物质、不同的温度、不同的时间，不同的碳铁比试验，确定了热解法制备Fe3O4-活性炭产品的最佳条件。研究了Fe3O4-活性炭产品中的铁化学物相的分析方法：将磁铁吸出的样品用浓盐酸溶解，过滤，定溶后，部分溶液直接用重铬酸钾测定二价铁（同时测定活性炭产生的空白值），部分溶液用过量锌粉还原后，又用重铬酸钾测定总铁，由此得到两种价态的铁含量，并计算出二者摩尔比。并根据资料方法分离和测定磁铁含量。最后加入氢氧化镍，在高温下制备出磁性活性炭载镍催化剂，用磁性活性炭载镍催化剂，做丙酮、甘油的催化加氢实验，结果表明：用氨水与氯化铁反应后，活性炭载铁量为8%时，在木炭保护下，600℃时，在马弗炉中反应1.5h，制备所得的磁性活性炭磁性效果最好，制备得到的磁性活性炭载Ni催化剂，对丙酮、甘油的催化加氢效果明显。

关键词：活性炭；热分解；Fe3O4；催化剂

Abstract:This subject adopts thermal decomposition for preparing magnetic activated carbon and confirms the best condition of making activated carbon Fe3O4 according to different ferrous material, different temperature, the different time and different carbon iron ratio tests. This thesis has a research on the analysis method of iron chemicals in Fe3O4 -carbon product. Its procedures include samples dissolution with strong hydrochloric acid, filtering, constant volume, some solution with potassium dichromate assaying bivalent iron directly (simultaneous determination of null value made by activated carbon), part of solution restored by excessive zinc powder, and assaying the total sum of iron with potassium dichromate, as a result of two valence iron content and computing two Moore ratio. The magnet content could be separated and assayed according to the method. The last step is adding nickel hydroxide to make nickel catalyst with magnetic activated carbon under high temperature, use magnetic activated carbon load nickel as catalyst, do acetone, glycerin catalytic hydrogenation experiment. The results shows that using the ammonia and ferric chloride, 8% iron content loaded by activated carbon, protection under charcoal, the temperature of 600 ℃ and 1.5h in muffle furnace, The obtained magnetic activated carbon which carrying Ni has an obvious effect on catalyst acetone and glycerin of catalysis hydrogenation.

Keywords: activated carbon；thermal decomposition ; Fe3O4;catalyst