铁系添加剂对污泥基活性炭性能与结构的影响

通过在污泥中分别掺入铁系添加剂(氯化铁、氯化亚铁、三氧化二铁),采用化学活化法制备出改性污泥活性炭。以吸附碘值为标准,考察了添加剂掺入比例、活化剂浓度、热解温度、热解时间对活性炭吸附性能的影响。并对其结构进行比表面积及孔隙结构(BET)、表面形态(SEM)、X-射线衍射(XRD)、红外光谱(FT-IR)等表征分析。结果表明:相比于纯污泥活性炭,掺入FeCl_3、FeCl_2、Fe_2O_3制备出的改性污泥活性炭的吸附碘值分别提高了31.59%、18.23%、15.48%。比表面积分别提高了101.6%、91.4%、79%。而且表面都具有羟基、羧基、酚羟基、碳碳双键和三键等官能团。

炭化条件和铁系添加剂对炭分子筛性能影响的研究

Through carbonization and Fe additive with Jixi bituminous coal as a raw material, the author research on a preparation of CMS using in production of nitrogen rich air with air separation and examine The influence of carbonization condition and Fe additive on the air separation performance of the products, the influence of carbonization conditions such as the carbonization temperature, the heating rate and the holding time as well as the additives such as coal tar, Fe3O4 and their ratio in the raw material were studied. It is concluded that Jixi bituminous coal is a good raw material for preparation of CMS. The optimum carbonization conditions are bond dosage 35w%, Fe additive (Fe3O4) 25.3w%, heating rate 10?℃/min, final carbonization at 900?℃ for 60?

炭化条件和铁系添加剂对炭分子筛性能的影响

以鸡西烟煤为原料 ,采用炭化法和添加铁系添加剂进行了空气分离生产富氮空气用炭分子筛的制备研究 ,考察了炭化条件和铁系添加剂用量对产品空气分离性能的影响。结果表明 ,鸡西烟煤是制备炭分子筛的优良原料。最佳炭化条件为粘结剂用量 35 % ,升温速度为 10℃ /min,炭化终温为 90 0℃ ,恒温时间为 60 min,铁系添加剂 Fe3O4 的最佳用量为 2 5 .3%。

铁系添加剂对煤基磁性活性炭性能的影响

磁性活性炭(MAC)是解决使用后活性炭回收难题的关键.选用太西无烟煤为原料,分别以四氧化三铁和草酸铁为添加剂,一步法制备了煤基磁性活性炭;测定了活性炭的碘值和亚甲蓝值,利用氮气吸附仪和振动样品磁强计分别表征其孔结构和磁性能,并考察了添加剂对活性炭吸附性能、孔结构及磁性能的影响.结果表明,铁系添加剂具有催化作用,对活性炭的孔结构有调控作用,使中孔率上升;添加剂的引入可增强活性炭的磁性;四氧化三铁的效能优于草酸铁,当四氧化三铁添加量为6.0%,炭化温度600℃,活化温度880℃时,活性炭比表面积、碘吸附值、比饱和磁化强度分别达到678.7m2/g,849.76mg/g,2.614emu/g.

Utilization of coal-derived pyrite by electrolysis

The utilization of coal derived pyrite by electrolysis was studied. It is obvious that the sulfur and Fe in pyrite can be electrolyzed into Fe 3+ and SO 2- 4, and the no pollutant is drained off. In this paper, the influence of conditions, including electrolysis potential, time, temperature, the acidity of electrolysis solutions, the concentration of adding agent, the concentration of pyrite, and the rate of conversion of pyrite (Cr) was investigated. Cr increases with the rise of potential, time, temperature, acidity and the concentration of additive agent, but decreases with the rise of concentration of pyrite. At the certain conditions (at the potential of 3 0 V, temperature of 298 K, time of 12 h, the concentration of MnSO 4 of 6%, concentration of pyrite of 4%, and concentration of acid of 10%), Cr is high to 93%. In the same time, the mechanism of electrolysis of pyrite was provided. The electrolysis of pyrite is actually the recycle of Mn ion between anodic surface and pyrite. At last, the production of FeSO 4·7H 2O through electrolysis of pyrite was introduced.