多孔复合金属膜的水热法制备及其处理焦化脱硫废液的性能  

Preparation of multi-porous composite metal membranes by in-situ hydrothermal method and their application in treating coking desulfurization wastewater

作　　者：孔祥贵[1] 肖甜[1] 于晓[2] 张晨阳[1] 雷晓东[1] 

机构地区：[1]北京化工大学化工资源有效利用国家重点实验室,北京100029 [2]沧州职业技术学院,河北沧州061001

出　　处：《石油化工》2016年第2期133-138,共6页Petrochemical Technology

基　　金：国家高技术研究发展计划项目(2012AA03A609);自然科学基金联合基金项目(U140710100)

摘　　要：采用不锈钢基体,以尿素为沉淀剂、硝酸镍为镍源,采用原位生长法在316L金属毡上生长Ni-Fe类水滑石薄膜,随后利用氢气还原的方法制备了多孔复合金属膜,并以焦化脱硫废液为对象,考察了多孔复合金属膜在废水处理方面的性能。利用XRD、SEM、FTIR、压汞仪等仪器对材料的结构和性能进行了表征。实验结果表明,相比于基体,在90℃下水热反应48 h所制备的多孔复合金属膜的过滤精度有了很大提高,孔隙率为45.82%,纯水通量达到5 743 L/(m2·min·MPa),过滤精度为0.324μm。使用该滤膜几乎能完全去除焦化脱硫废液中的悬浮颗粒物质,脱除率在99.99%以上。Ni-Fe layered double hydroxide membranes（NiFe-LDH/SSF） were fabricated on the surface of stainless steel sintered felt with stainless steel as basis material, urea as precipitant and nickel nitrate as nickel source by in situ hydrothermal method and then multi-porous composite metal membranes（NiFe/SSF） were obtained through the reduction of NiFe-LDH/SSF with hydrogen. These prepared membranes were characterized by means of XRD and SEM. The porosity, pure water flux and filtration accuracy of NiFe/SSF prepared through in the situ hydrothermal treatment at 90 ℃ for 48 h were 45.82%, 5 743 L/（m2 min MPa） and 0.324 μm, respectively. The removal ratio of solid impurities in coking desulfurization wastewater reached more than 99.99% when NiFe/SSF was used.

关 键 词：原位水热法 水滑石 多孔复合金属膜 过滤 焦化脱硫废液 

分 类 号：TQ051.8[化学工程]