Spherical Al2O3-coated mullite fibrous ceramic membrane and its applications to high-efficiency gas filtration

doi:10.1016/j.seppur.2019.01.026

	Spherical Al2O3-coated mullite fibrous ceramic membrane and its applications to high-efficiency gas filtration
	Cuo, Zhaxi 1,2; Zhang, Jiayu 1,2; Yu, Bo 1,2; Peng, Shengpan 1,2; Liu, Haidi 1; Chen, Yunfa 1,3
刊名	SEPARATION AND PURIFICATION TECHNOLOGY
	2019-05-15
卷号	215 页码:368-377
关键词	Porous ceramics Mullite fiber Spray coating Gas filtration Pressure drop
ISSN号	1383-5866
DOI	10.1016/j.seppur.2019.01.026
英文摘要	Porous ceramic membranes (PCMs) have been widely used in gas filtration to reduce the Particulate Matters (PMs) emission from industrial systems. Generally, the filter materials are composed of two parts: the support layer and filter layer. However, the typical PCMs prepared through accumulation of particles have existing problems like heavy self-weight, low porosity and high pressure drop, which limit their use in practical applications. In this paper, fibrous PCMs with three-dimensional structures were prepared and then coated with a layer of spherical alpha-Al2O3 membrane on the surface via spray-coating process. The effect of binder composition and sintering temperature on the porosity, phase composition, bulk density and mechanical strength of PCMs, as well as the effect of the coating thickness of spherical alpha-Al2O3 on PMs filtration efficiency and pressure drop were investigated. The results showed that samples with an added binder weight of 50 wt% and sintered at 1250 degrees C resulted to an optimal structure with material properties such as low bulk density (0.88 g/cm(3)), high porosity (70.36%), low linear shrinkage (0.40%), high mechanical strength (5.54 Mpa), and excellent corrosion resistance against both acid and alkali solutions. Furthermore, a spherical alpha-Al2O3 coating thickness of 150 mu m was found to effectively reduced the concentration of PMs from dust-laden air through the filtration tests, achieving enhanced dust removal efficiencies of almost 100% for 3-10 mu m, 99.2% for 1.0 mu m, 95.0% for 0.5 mu m and 91.6% for 0.3 mu m PMs with the pressure drop was only 280 Pa when the airflow linear velocity reached to 2.00 m min(-1). The membranes displayed a 10% increase efficiency in fine particles (d = 1.0-0.3 mu m) removal compared to those without alpha-Al2O3 coating layer.
资助项目	"Transformational Technologies for Clean Energy and Demonstration", Strategic Priority Research Program of the Chinese Academy of Sciences ; Key Deployment Program of the Chinese Academy of Sciences[ZDRW-ZS-2017-6-2]
WOS关键词	HOLLOW-FIBER MEMBRANE ; AMBIENT PM2.5 ; SOURCE APPORTIONMENT ; MECHANICAL-BEHAVIOR ; TEMPERATURE ; PERFORMANCE ; POLLUTION ; SUPPORTS
WOS研究方向	Engineering
语种	英语
出版者	ELSEVIER SCIENCE BV
WOS记录号	WOS:000458941900037
资助机构	"Transformational Technologies for Clean Energy and Demonstration", Strategic Priority Research Program of the Chinese Academy of Sciences ; Key Deployment Program of the Chinese Academy of Sciences
内容类型	期刊论文
源URL	[http://ir.ipe.ac.cn/handle/122111/28110]
专题	中国科学院过程工程研究所
通讯作者	Chen, Yunfa
作者单位	1.Chinese Acad Sci, Inst Proc Engn, State Key Lab Multiphase Complex Syst, Beijing 100190, Peoples R China 2.Univ Chinese Acad Sci, 19A Yuquan Rd, Beijing 100049, Peoples R China 3.CAS Ctr Excellence Urban Atmospher Environm, Xiamen 361021, Peoples R China
推荐引用方式 GB/T 7714	Cuo, Zhaxi,Zhang, Jiayu,Yu, Bo,et al. Spherical Al2O3-coated mullite fibrous ceramic membrane and its applications to high-efficiency gas filtration[J]. SEPARATION AND PURIFICATION TECHNOLOGY,2019,215:368-377.
APA	Cuo, Zhaxi,Zhang, Jiayu,Yu, Bo,Peng, Shengpan,Liu, Haidi,&Chen, Yunfa.(2019).Spherical Al2O3-coated mullite fibrous ceramic membrane and its applications to high-efficiency gas filtration.SEPARATION AND PURIFICATION TECHNOLOGY,215,368-377.
MLA	Cuo, Zhaxi,et al."Spherical Al2O3-coated mullite fibrous ceramic membrane and its applications to high-efficiency gas filtration".SEPARATION AND PURIFICATION TECHNOLOGY 215(2019):368-377.