Journal
AICHE JOURNAL
Volume 67, Issue 2, Pages -Publisher
WILEY
DOI: 10.1002/aic.17063
Keywords
heat transfer; mass transfer; mathematical modeling; moving boundary problem; wax deposition
Categories
Funding
- University of Michigan Industrial Affiliates Program
Ask authors/readers for more resources
The transport model proposed can predict the time evolution of deposit thickness and the spatial evolution of temperature and wax concentration. For oils with high wax content, deposit thickness growth is mainly controlled by heat transfer, whereas for oils with low wax content, the growth is slow and accompanied by occasional sloughing.
A transport model is proposed for wax deposition onto a cold finger from flowing wax-containing oils. The model solves transient energy and mass balances simultaneously for a reversible first-order kinetic rate for precipitation of pseudo-single-component wax, and the effects of yield stress using a critical solid wax concentration to withstand flow-induced stress at the deposit-fluid interface. The model can predict the time evolution of the deposit thickness, and the spatial and temporal evolution of temperature and wax concentration as validated using cold finger experiments. It was found that for high wax content oils, deposit thickness growth is dominated by heat transfer. For low wax content oils that are unable to gel, the thickness growth is slow and accompanied by occasional sloughing. Regardless of the mechanism controlling the growth, mass transfer cannot be neglected as wax diffusion into the deposit continues to take place after the deposit has stopped growing.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available