煤炭飞灰中产生的化物对氨气的增强和延长吸附
Jungho Lee1, Jiyull Kim2, Ki Young Park3
1Department of Environmental Engineering, Graduate School, Konkuk University, 120 Neungdong-ro, Gwangjin-gu, Seoul, 05029, Republic of Korea.
从煤炭飞灰 (CFA) 合成的热石显示出高氨气吸附. 上循环的热石提供了卓越的回收效率,证明了一种可持续的氨去除方法.
科学领域:
- 材料科学 材料科学 材料科学
- 环境化学环境化学
- 化学工程是化学工程的重要组成部分.
背景情况:
- 煤炭飞灰 (CFA) 是一种工业副产品,具有材料合成的潜力.
- 氨气 (NH3) 的去除对于环境保护和工业过程至关重要.
- 热带石是各种气体的有效吸附剂,包括氨气.
研究的目的:
- 从CFA合成化物,用于氨气吸附.
- 调查磁分离对CFA属性和热石性能的影响.
- 与商业热石相比,评估合成热石的吸附能力和可回收性.
主要方法:
- 使用NaOH和KOH从CFA合成焦化物.
- 磁性分离以减少CFA中的铁杂质.
- BET表面积分析,FTIR和NH3-TPD用于材料特性.
- 固定床反应堆实验用于氨气吸附和循环试验.
主要成果:
- 从非磁性飞灰 (NMFA) 和NaOH (ZNF-X) 中合成的焦化物表现出高的BET表面积 (425.28 m2/g) 和微孔体积.
- ZNF-X显示出高的氨吸附能力 (64.9毫克/克).
- 由于吸附温度较低,ZNF-X的回收效率 (92.0%) 与商业13X热带石 (31.5%) 相比更高.
结论:
- 将CFA再循环转化为化物是一种生产有效氨吸附剂的可行方法.
- 合成的ZNF-X焦石提供了一种可持续且高效的解决方案,用于去除氨气.
- 增强的吸附性和ZNF-X的可回收性突出显示了它在工业应用中的潜力.
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