单相CuO与复相TiO2-CuO-MgO对粉煤灰基陶瓷膜支撑体的性能影响研究
Effects of single-phase CuO and multiphase TiO2-CuO-MgO on the properties of fly ash based ceramic membrane support
詹辉 1郭雅妮 1同帜 1吕相玉 1陈维星1
作者信息
- 1. 西安工程大学环境与化学工程学院,西安 710048
- 折叠
摘要
采用工业废弃物粉煤灰为主料,结合黏结剂(羧甲基纤维素CMC)、造孔剂(木炭粉),探究烧结助剂(单相:CuO;复相:TiO2-CuO-MgO)在粉煤灰基陶瓷膜支撑体烧制中的作用与效应.其一探究单相烧结助剂CuO添加量对支撑体宏观理化特性(纯水通量、抗折强度、酸/碱腐蚀率)与微观结构特征(物质组成、微观形貌)的影响;其二通过正交实验研究复相烧结助剂TiO2-CuO-MgO不同配比下支撑体性能表现从而得到最优制备方案.结果表明,在1 050 ℃烧制温度下,CuO添加量为1％(质量分数)时样品性能良好,此时纯水通量:2 649.577 L/(m2·h·MPa),抗折强度:49.677 MPa,酸/碱腐蚀率:0.471％/0.107％,平均孔径2.375 µm,孔隙率为45.347％;1 050 ℃条件下,TiO2-CuO-MgO配比为1.5％(质量分数)TiO2、0.7％CuO、5％MgO时,样品综合性能最佳,性能数据为——纯水通量:6729.268L/(m2·h·MPa),抗折强度:67.454 MPa,酸/碱腐蚀率:2.964％/1.427％,平均孔径4.216μm,孔隙率为48.608％.
Abstract
In this paper,industrial waste fly ash is used as the main material,combined with the binder(car-boxymethyl cellulose CMC)and pore-making agent(charcoal powder),to explore the role and effect of the sin-tering additives(single-phase:CuO;Multiphase:TiO2-CuO-MgO)in the firing of fly ash based ceramic mem-brane support.Firstly,the effects of the amount of CuO additive on the macroscopic physical and chemical properties(pure water flux,flexure strength,acid/alkali corrosion rate)and microstructure characteristics(material composition and micro-morphology)of the support were investigated.Secondly,orthogonal experi-ments were conducted to study the performance of support under different proportions of TiO2-CuO-MgO,so as to obtain the optimal preparation scheme.The results show that at the firing temperature of 1 050 ℃,the sample performance is good when the CuO content is 1％(mass fraction).The pure water flux is 2 649.577 L/(m2·h·MPa),the bending strength is 49.677 MPa,the acid/alkali corrosion rate is 0.471％/0.107％,and the average pore size is 2.375 μm.The porosity is 45.347％.At 1 050 ℃,when the proportion of TiO2-Cuo-MGo is 1.5％(mass fraction)TiO2,0.7％CuO and 5％MgO,the comprehensive performance of the sample is the best,and the performance data are as follows:pure water flux of 6 729.268 L/(m2·h·MPa),bending strength of 67.454 MPa,acid/alkali corrosion rate of 2.964％/1.427％,average pore size of 4.216 μm,and porosity of 48.608％.
关键词
烧结助剂/陶瓷膜支撑体/粉煤灰/低温烧结Key words
sintering auxiliary/ceramic membrane support/fly ash/low temperature sintering引用本文复制引用
基金项目
陕西省科技厅重点研发计划项目(2020GY-325)
陕西省科技厅重点研发计划项目(2020ZDLNY06-09)
陕西省科技厅重点研发计划项目(2020SF-410)
出版年
2024
NETL
NSTL
万方数据