Effect on Fracture Strength and Entrainment Flux of Adding Ultrafine Powder to a Fine Fluidized Bed

• Itani Yoshihito

  The 1st Monomers Production Department, Asahi Kasei Chemicals Corporation

• Tsutsui Toshio

  Department of Applied Chemistry and Chemical Engineering, Kagoshima University

• Kono Hisashi O.

  Department of Chemical Engineering, West Virginia University

• Ijichi Kazuya

  Department of Applied Chemistry and Chemical Engineering, Kagoshima University

Bibliographic Information

Other Title

• 工業触媒を用いた微粉流動層における粉体構造破壊強度と粒子飛び出しフラックスに対する超微粉添加の影響
• コウギョウ ショクバイ オ モチイタ ビフン リュウドウソウ ニ オケル フンタイ コウゾウ ハカイ キョウド ト リュウシ トビダシ フラックス ニ タイスル チョウビフン テンカ ノ エイキョウ

Abstract

Fracture strength, one of the rheological characteristics of powder, entrainment flux and distribution of bulk density at free board were measured in systems of FCC (d_p=65 μm)−calcium carbonate (d_p=0.9 μm) and catalyst (d_p=50 μm)−fumed silica (d_p=0.04 μm) to clarify the effect on the entrainment flux and distribution of bulk density of adding ultrafine powder to the fluidized bed. Fracture strength was stronger, and entrainment flux and bulk density at free board were decreased by adding the ultrafine powder to these systems. The added ultrafine powder attached to the surface of the fine powder during fluidization, rather than remaining separate. This suggests that the ultrafine powder increased the interparticle force and caused the fracture strength to increase. The increase in interparticle force would also give rise to particle agglomeration, as a result of which the apparent agglomerated particle diameter and terminal velocity would increase, and the entrainment flux and bulk density at free board would decrease. The entrainment flux and bulk density at free board were correlated as a function of the fracture strength for the systems examined here. The results suggest that the entrainment flux and bulk density at free board can be controlled by changing the fracture strength through addition of ultrafine powder, and that this method may be effective for industrial use.

Journal

• KAGAKU KOGAKU RONBUNSHU

  KAGAKU KOGAKU RONBUNSHU 33 (1), 20-25, 2007

  The Society of Chemical Engineers, Japan

Keywords

• Fluidized Bed
• Fine Powder
• Ultrafine Powder
• Binary Mixture
• Entrainment
• Cohesion

Details

• CRID: 1390282679484448384
• NII Article ID: 10018501023
• NII Book ID: AN00037234
• DOI: 10.1252/kakoronbunshu.33.20
• COI: 1:CAS:528:DC%2BD2sXjt1Cht70%3D
• ISSN: 13499203
• ISSN: 0386216X
• NDL BIB ID: 8665389
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I8665389
• Web Site: http://www.jstage.jst.go.jp/article/kakoronbunshu/33/1/33_1_20/_pdf
• Text Lang: ja
• Data Source:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
• Abstract License Flag: Disallowed