Fe-Co/LDHs催化剂的制备及催化氧化含硫废碱液
Preparation of Fe-Co/LDHs Catalyst and Its Catalytic Oxidation of Sulfur-Containing Alkali Wastewater
刘宝旗 1金竹胜 2徐灿 2张歌珊 2袁军2
作者信息
- 1. 中海石油舟山石化有限公司,浙江 舟山 316000
- 2. 武汉工程大学 化学与环境工程学院,湖北 武汉 430205
- 折叠
摘要
本文基于催化空气氧化模拟含硫废碱液和真实石化企业含硫废碱液,以水铝钙石为载体,利用浸渍法制备Fe-Co复合氧化物非均相负载型催化剂(Fe-Co/LDHs),并优化催化剂制备条件和反应条件.当催化剂中n(Fe)∶n(Co)=9∶1(摩尔比)、总金属负载率为 25%、焙烧温度为 600℃时,制备的催化剂效果最好;处理 6000 mg/L的模拟含硫废碱液时,每升添加 10g催化剂,在 75℃下曝气量为 2.5 L/min时效果最佳,3 h脱硫率可达到 96.7%;而处理相同浓度的实际含硫废水时,3 h脱硫率可达 92.4%,且循环使用 10 次后催化效果无明显下降.结果表明Fe-Co/LDHs催化剂的催化活性优异且稳定,具有较好的应用前景.
Abstract
In this work,Fe-Co composite oxide heterogeneous catalyst(Fe-Co/LDHs)loading on hydrocalumite was prepared using impregnation approach for the catalytic air oxidation of simulated sulfur-containing alkali wastewater and real wastewater from petrochemical enterprises.The preparation conditions of the catalyst and the reaction conditions were optimized.When n(Fe)∶n(Co)=9∶1(molar ratio)in the catalyst,total metal loading percentage is 25%,and roasting temperature is 600℃,the catalyst shows the best catalytic activity.For the simulated sulfur-containing alkali wastewater with the initial sulfur concentration of 6000 mg/L,the reaction can reach desulfurization of 96.7%after 3 h with the catalyst dosage of 10 g/L,reaction temperature of 75℃,and aeration rate of 2.5 L/min,while the desulfurization can maintain 92.4%after 3 h for real sulfur-containing wastewater with the same concentration.Besides,the efficiency of the catalyst after 10 cycles shows no obvious decrease.The results show that the Fe-Co/LDHs catalyst has excellent and stable catalytic activity and have good application prospects.
关键词
Fe-Co复合氧化物/水铝钙石/浸渍法/催化空气氧化/含硫废碱液Key words
Fe-Co composite oxide/hydrocalumite/impregnation approach/catalytic air oxidation/sulfur-containing alkali wastewater引用本文复制引用
出版年
2024
NETL
NSTL
万方数据