Page 154 - 《精细化工》2020年第6期

第 37 卷第 6 期 精 细 化 工 Vol.37, No.6
202 0 年 6 月 FINE CHEMICALS June 2020

催化与分离提纯技术
球磨法制备 NiO/MgAl O 催化剂用于
2
4
低浓度甲烷催化燃烧

*
黄 波，鲁 旖，江志东
（上海交通大学 化学化工学院，上海 200240）

摘要：用球磨法制备了 MgAl 2 O 4 尖晶石负载的 NiO 催化剂 NiO/MgAl 2 O 4 ，考察了镍源、NiO 负载量、球料比、
球磨转速、焙烧温度对低浓度甲烷催化燃烧的影响，并用 H 2 -TPR、BET、XRD、SEM 等手段对催化剂进行了
表征。结果表明，与沉淀-沉积法或浸渍法相比，球磨法制备的催化剂前驱体与载体的相互作用较弱，焙烧后生
成了高活性 NiO 物种。球磨法制备时，镍盐种类及 NiO 负载量、球料比、转速以及焙烧温度均会改变载体表面
NiO 晶粒的大小和结合状态，从而影响其活性。以乙酸镍为镍源、NiO 质量分数 10%、球料比 2∶1、球磨转速
400 r/min、经 700 ℃焙烧，制得的 NiO/MgAl 2 O 4 催化剂稳定性和活性较好；600 ℃下，700 ℃焙烧制得催化剂
的拟一级反应速率常数（k 600 ）为 0.489 L/(g·s)，高于 MgAl 2 O 4 尖晶石负载的 La 0.8 Ca 0.2 FeO 3 或 La 0.8 Sr 0.2 MnO 3 钙
钛矿催化剂。
关键词：低浓度甲烷；NiO 催化剂；MgAl 2 O 4 尖晶石；球磨法；乙酸镍；催化技术
中图分类号：TQ426.94 文献标识码：A 文章编号：1003-5214 (2020) 06-1220-08

Preparation of NiO/MgAl 2O 4 catalysts by ball-milling method for
catalytic lean burn of high-diluted methane

*
HUANG Bo, LU Yi, JIANG Zhidong
（School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China）

Abstract: NiO catalysts supported on MgAl 2O 4 spinel were prepared by ball-milling method, and the
effects of nickel source, NiO loading, ball-to-powder ratio, ball-milling speed, and calcination temperature
on the catalytic lean burn of high-diluted methane were investigated. The catalysts were characterized by
H 2-TPR, BET, XRD and SEM, etc. The results showed that weaker interaction between nickel precursor
and carrier was found in catalysts prepared by ball-milling method than that by impregnation method or
deposition-precipitation method, to produce NiO species with higher catalytic activity after calcination. In
ball milling method, all factors of nickel source, NiO loading, ball-to-powder ratio, ball-milling speed and
calcination temperature affected catalytic performances of the catalyst by altering the grain size or bonding
state of NiO species on carrier surface. The prepared NiO/MgAl 2O 4 catalyst demonstrated better stability
and activity under the conditions of nickel acetate as nickel source, NiO mass fraction of 10%,
ball-to-powder ratio of 2∶1, ball-milling speed of 400 r/min, and calcined temperature of 700 ℃. Its
pseudo first-order reaction rate constant at 600 ℃ was 0.489 L/(g·s), higher than that of La 0.8Ca 0.2FeO 3 or
La 0.8Sr 0.2MnO 3 perovskite supported on MgAl 2O 4 spinel.
Key words: high-diluted methane; NiO catalyst; MgAl 2O 4 spinel; ball-milling method; nickel acetate;
catalysis technology

煤炭开采中有大量瓦斯释放，其成分主要是甲 烷。巨量的矿井排风中甲烷体积分数低于 1%，难以

收稿日期：2020-01-22; 定用日期：2020-03-12; DOI: 10.13550/j.jxhg.20200066
作者简介：黄 波（1995—），男，硕士生，E-mail：huangbo163mail@163.com。联系人：江志东（1967—），男，副教授，E-mail：
zdjiang@sjtu.edu.cn。