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Sedimentation in flocculating colloidal suspensions Jeffrey S. Abel and Gregory C. Stangle
 

Summary: Sedimentation in flocculating colloidal suspensions
Jeffrey S. Abel and Gregory C. Stangle
School of Ceramic Engineering and Sciences, New York State College of Ceramics at Alfred University,
Alfred, New York 14802
Christopher H. Schilling
Department of Materials Science and Engineering, Iowa State University, Ames, Iowa 50011
Ilhan A. Aksay
Department of Chemical Engineering and Princeton Materials Institute, Princeton University, Princeton,
New Jersey 08544
(Received 29 March 1993; accepted 17 September 1993)
A combined experimental and theoretical investigation of the sedimentation of
unstable colloidal ceramic suspensions has been performed. Suspensions containing
submicron-sized a-Al2 O3 particles were prepared at various pH values in order
to modify suspension stability. Particle volume fraction during sedimentation was
determined as a function of position and time by gamma-ray densitometry. A population
balance model was developed to account for various coagulation and decoagulation
mechanisms that affect sedimentation behavior in flocculating suspensions. Model
predictions were then compared with experimental measurements, in order to establish
the validity of the theoretical model.
I. INTRODUCTION

  

Source: Aksay, Ilhan A. - Department of Chemical Engineering, Princeton University

 

Collections: Materials Science