TY - JOUR
AU1 - Wang, Wei
AU2 - Huang, Qiyu
AU3 - Zheng, Haimin
AU4 - Li, Si
AU5 - Long, Zhen
AU6 - Wang, Qiuchen
AB - Abstract As pipeline transportation is widely used in the petroleum industry, the problem of wax deposition is a severe threat to the safety of oil and gas transportation. In addition, the mechanism of wax deposition is very complicated due to the presence of water phase. This paper tries to clarify the effects of water fraction, temperature difference and experimental period on the wax deposition process in water-in-oil emulsion system by a series of static cold finger experiments. The experimental results reveal that the average diffusion rates decrease with increased water fraction, longer experimental period and reduced temperature difference. Furthermore, on the basis of wax deposition experiments in cold finger apparatus and radial temperature distribution simulations via Fluent, the influence of water phase on heat transfer occurring in the wax molecular diffusion process is revealed, and relationship between mass transfer and heat transfer is investigated. Additionally, the effective diffusion coefficient of wax molecules is calculated on the basis of experimental and simulation results. The calculated effective diffusion coefficients using this approach are significantly lower than the calculated results from conventional methods. This explains the remarkable disparity with previous works due to underestimating the influence of dispersed water.
TI - Investigation of wax deposition and effective diffusion coefficient in water-in-oil emulsion system
JF - Journal of Thermal Analysis and Calorimetry
DO - 10.1007/s10973-018-7385-6
DA - 2018-11-01
UR - https://www.deepdyve.com/lp/springer-journals/investigation-of-wax-deposition-and-effective-diffusion-coefficient-in-kuUjF396YH
SP - 1031
EP - 1043
VL - 134
IS - 2
DP - DeepDyve
ER -