·3790 ·
研究开发
化
工
进
展
CHEMICAL INDUSTRY AND ENGINEERING PROGRESS
2015年第34卷第10期
烟煤地下气化半焦对模拟废水中苯酚的脱除
张乐，谌伦建，邢宝林，徐冰，苏毓，李郑鑫（河南理工大学材料学院，河南焦作454003）
摘要：以壁烟煤地下气化半焦为脱除剂，对苯酚模拟废水进行脱除实验研究。采用扫描电镜、低温氮气物理脱除仪和红外光谱仪对率焦的表面特性、孔结构和表面官能困进行表征，进一步考察了半焦投加量、震荡时间、实验温度对模拟废水苯酚脱除的影响。实验结果表明：气化率焦具有微孔（小于2nm）和层状结构，微孔孔径主要分布在1～5nm之间，表面有较丰富的含氧官能团；在模拟度水苯酚浓度为100mg/L、水焦比为10：1、震荡时间为2h、脱除温度为40℃时，半焦对苯酚的脱除率和吸附容量分别为65%和0.66mg/g，气化半焦的孔结构特性和表面含氧官能团对苯酚脱除有积极作用；半焦对模拟废水中苯酚的吸附为多分子层物理吸附，其Freundlich 吸附等温式为Q=0.0546C0.6286
关键词：烟煤气化半焦；苯酚；脱除率；吸附等温式
中图分类号：TD98；X703.1
文献标志码：A
DOI:10.16085/j.issn.1000-6613.2015.10.041
文章编号：1000-6613（2015）10-3790-05
Removalofphenolfromsimulatedwastewaterbyundergroundcoal
gasificationsemi-coke
ZHANG Le，CHEN Lunjian，XING Baolin，XU Bing，SU Yu，LIZhengxin
(School of Material Science and Engineering, Henan Polytechnic University, Jiaozuo 454003, Hennan, China) Abstract: Using Hebi semi-coke from underground coal gasification as the adsorbent, the removal experiment of phenol from simulated wastewater was conducted.The surface morphology,porous characteristics and functional groups of the semi-coke were characterized by applying scanning electron microscope (SEM),automatic specific surface and porosity analyzer and Fourier transform infrared spectroscopy（FT-IR）.Furthermore，the effects of adsorbent mass，contact time and experimental temperature on phenol removal were also investigated. The results showed that micropore with pore width less than 2nm and layer structure with pore size distribution in 1—5nm of semi-coke were observed and surface oxygen enriched functionalities were also found in semi-coke. The highest phenol removal rate of 65% and adsorption capacity of 0.66mg/g could be obtained under conditions of temperature at 4oC for 2h,with phenol concentration of 1oOmg/L and mass ratio of simulated wastewater to adsorbent of 1o : 1. The porous characteristic as well as surface oxygen enriched functional groups play a positive role in phenol's physical polymolecular layer adsorption，the Freundlich Equation can be calculated as Q=0.0546C0.6286
Key words:semi-coke of bituminous coal gasification;phenol;removal rate;adsorption isotherm
煤炭地下气化（undergroundcoalgasifi-cation）是直接在地下将煤炭进行有控制地燃烧而转化成气体燃料或化工原料的一种煤炭资源开发技术)，但是，在地下封闭环境条件下进行煤炭地下气化的过
收稿日期；2015-03-27：修改稿日期：2015-05-22。
基金项目：国家自然科学基金（51174077，51404098）及教育部博士点基会（20124116110002）项目。
第一作者：张乐（1990一），男，硕士研究生，研究方向为洁净煤技术。E-mailkjzhangle@163.com。联系人：谌伦建，教授，博士，从事煤基弱材料和煤炭地下气化相关研究，E-mailLunjianc@hpu.edu.cn