SCI和EI收录∣中国化工学会会刊

中国化学工程学报 ›› 2021, Vol. 29 ›› Issue (1): 417-425.DOI: 10.1016/j.cjche.2020.08.018

• Materials and Product Engineering • 上一篇    下一篇

Preparation and properties of a low-cost porous ceramic support from low-grade palygorskite clay and silicon-carbide with vanadium pentoxide additives

Zhaoru Fan1,2, Shouyong Zhou1, Ailian Xue1, Meisheng Li1, Yan Zhang1, Yijiang Zhao1, Weihong Xing2   

  1. 1 Jiangsu Engineering Laboratory for Environmental Functional Materials, Jiangsu Key Laboratory for Chemistry of Low-Dimensional Materials, School of Chemistry and Chemical Engineering, Huaiyin Normal University, Huai'an 223300, China;
    2 State Key Laboratory of Materials-Oriented Chemical Engineering, Nanjing Tech University, Nanjing 210009, China
  • 收稿日期:2020-03-09 修回日期:2020-07-17 出版日期:2021-01-28 发布日期:2021-04-02
  • 通讯作者: Shouyong Zhou, Yijiang Zhao
  • 基金资助:
    The authors are grateful for the financial support of the National Natural Science Foundation of China (No. 21978109, 21878118), Natural Science Foundation of the Jiangsu Higher Education Institutions of China (19KJA430011), Natural Science Foundation of Jiangsu Province (BK20171268), Jiangsu Province industry-university-research cooperation project (BY2019179), Jiangsu Qing Lan Project.

Preparation and properties of a low-cost porous ceramic support from low-grade palygorskite clay and silicon-carbide with vanadium pentoxide additives

Zhaoru Fan1,2, Shouyong Zhou1, Ailian Xue1, Meisheng Li1, Yan Zhang1, Yijiang Zhao1, Weihong Xing2   

  1. 1 Jiangsu Engineering Laboratory for Environmental Functional Materials, Jiangsu Key Laboratory for Chemistry of Low-Dimensional Materials, School of Chemistry and Chemical Engineering, Huaiyin Normal University, Huai'an 223300, China;
    2 State Key Laboratory of Materials-Oriented Chemical Engineering, Nanjing Tech University, Nanjing 210009, China
  • Received:2020-03-09 Revised:2020-07-17 Online:2021-01-28 Published:2021-04-02
  • Contact: Shouyong Zhou, Yijiang Zhao
  • Supported by:
    The authors are grateful for the financial support of the National Natural Science Foundation of China (No. 21978109, 21878118), Natural Science Foundation of the Jiangsu Higher Education Institutions of China (19KJA430011), Natural Science Foundation of Jiangsu Province (BK20171268), Jiangsu Province industry-university-research cooperation project (BY2019179), Jiangsu Qing Lan Project.

摘要: A low-cost porous ceramic support was prepared from low-grade palygorskite clay (LPGS) and silicon carbide (SiC) with vanadium pentoxide (V2O5) additives by a dry-press forming method and sintering. The effects of SiC-LPGS ratio, pressing pressure, carbon powder pore-forming agent and V2O5 sintering additives on the microstructure and performance of the supports were investigated. The addition of an appropriate amount of SiC to the LPGS can prevent excessive shrinkage of the support during sintering, and increase the mechanical strength and open porosity of the supports. The presence of SiC (34.4%) led to increases in the open porosity and mechanical strength of 40.43% ± 0.21% and (17.76 ± 0.51) MPa, respectively, after sintering at 700 ℃ for 3 h. Because of its low melting point, V2O5 can melt to liquid during sintering, which increases the mechanical strength of the supports and retains the porosity. Certainly, this can also encourage efficient use of the LPGS and avoid wasting resources.

关键词: Low-grade palygorskite clay, Porous ceramic support, SiC, Sintering

Abstract: A low-cost porous ceramic support was prepared from low-grade palygorskite clay (LPGS) and silicon carbide (SiC) with vanadium pentoxide (V2O5) additives by a dry-press forming method and sintering. The effects of SiC-LPGS ratio, pressing pressure, carbon powder pore-forming agent and V2O5 sintering additives on the microstructure and performance of the supports were investigated. The addition of an appropriate amount of SiC to the LPGS can prevent excessive shrinkage of the support during sintering, and increase the mechanical strength and open porosity of the supports. The presence of SiC (34.4%) led to increases in the open porosity and mechanical strength of 40.43% ± 0.21% and (17.76 ± 0.51) MPa, respectively, after sintering at 700 ℃ for 3 h. Because of its low melting point, V2O5 can melt to liquid during sintering, which increases the mechanical strength of the supports and retains the porosity. Certainly, this can also encourage efficient use of the LPGS and avoid wasting resources.

Key words: Low-grade palygorskite clay, Porous ceramic support, SiC, Sintering