铁碳复合材料的制备及其载铁效果分析  

Preparation and iron loading effect analysis of iron-carbon materials

作　　者：张新庄 马天奇 王丹丹 南蓓蓓 范昊坤 董晨曦 ZHANG Xinzhuang;MA Tianqi;WANG Dandan;NAN Beibei;FAN Haokun;DONG Chenxi(Research Institute of Shaanxi Yanchang Petroleum(Group)Co.,Ltd.,Xi’an 710065,China)

机构地区：[1]陕西延长石油(集团)有限责任公司研究院,陕西西安710065

出　　处：《化工环保》2025年第1期69-78,共10页Environmental Protection of Chemical Industry

基　　金：陕西延长石油(集团)有限责任公司项目(ycsy2023ky-B-63,ycsy2023ky-B-54,ycsy2024jcyj-B-23)。

摘　　要：以废弃炭渣(WCR)为碳源,以水溶性铁盐和固体铁粉为铁源,采用液相浸渍法和固相球磨法制备了铁碳复合材料(ICM),采用SEM、TEM、EDS、XRD、XPS等手段表征了不同ICM的载铁效果,并优化了ICM的制备方法。实验结果表明:两种方法均能使WCR与铁源有效结合;液相浸渍法所制得的ICM中Fe以Fe_(2)O_(3)、Fe^(2+)、Fe^(3+)等形态均匀附着,但缺少高活性零价铁(ZVI);固相球磨法所制得的ICM中Fe以Fe单质、FeO、Fe_(2)O_(3)、Fe^(2+)等形态存在,并呈现不同元素间的融合,但球磨时间过长所产生的大量细颗粒物会对Fe与C之间的融合造成掩蔽;减少Fe源粒径并添加Fe_(3)O_(4)助磨,球磨24 h后,可获得粒度均匀、高效融合、富含Fe_(2)O_(3)的ICM;采用液相浸渍—热解法,可获得纳米Fe球状物(n-ZVI和/或n-FeSx)与C残渣复合物紧密结合的ICM。Using waste carbon residue(WCR)as the carbon source,water-soluble iron salts and solid iron powder as the iron sources,iron-carbon materials(ICM)were prepared by liquid-phase impregnation method and solid-phase ball milling method.Various means such as SEM,TEM,EDS,XRD,and XPS were applied to characterize the iron loading effect of different ICM,based on which the preparation methods of ICM were optimized.The experimental results indicate that both methods can effectively combine WCR with the corresponding iron source.The ICM produced by liquid-phase impregnation has Fe uniformly adhered to in the form of Fe_(2)O_(3)/Fe^(2+)/Fe^(3+),without highly active zerovalent iron(ZVI).The one produced by solid-phase ball milling contains Fe in the form of Fe/FeO/Fe_(2)O_(3)/Fe^(2+),presenting a fusion between different elements.However,a large number of fine particles generated by ball overmilling may cause a masking effect on the fusion between Fe and C.By reducing the particle size of the Fe source and adding Fe_(3)O_(4)for a 24 h ball milling,ICM can be obtained with uniform particle size,efficient fusion,and rich Fe_(2)O_(3).After liquid-phase impregnation and high-temperature pyrolysis,nano Fe spheroids(n-ZVI and/or n-FeSx)tightly bound to the C residue composite can be gained.

关 键 词：铁碳材料 浸渍 球磨 高温热解 微观形貌 物质组成 均匀性 

分 类 号：X705[环境科学与工程—环境工程]