Xianfeng Fan: Solve processing problems
From Billy Rosendale
In this video Xianfeng describes his research on particle technology, enhanced oil recovery, CO2 capture, microwave, separation, wastewater, PEPT, focusing on solving problems using colloid-interface science.
Below are the brief descriptions of my research work. For the detail, please see my publication list.
Enhanced oil recovery and CO2 storage:
My research focuses on the effect of chemical and physical properties of fluids and pore surfaces on multiphase transport and displacement in pores. We investigate enhanced oil recovery, CO2 injectivity and seal capacity at pore scale. Recently, we developed a technique to measure pore wettability, the displacement of pore fluids by water, CO2 in single pores. We found that pore wettability is very different from the wettability measured on flat surfaces and in free spaces.
Microwave enhanced gas (CO2) separation and surface modification:
My research focuses on using microwave irradiation to selectively heat solid at molecular level for adsorbent regeneration and to modify solid surface wettability in froth flotation. Recently, we received a research grant from EPSRC to support our research on microwave enhanced gas separation, and microwave enhanced adsorbent/absorbent regeneration.
Colloid and interfacial phenomena:
My research interests are not only on traditional emulsion, wetting and solid/bubble attachment, but more importantly on improving the dispersion or mixing of ultrafine particular materials through controlling their interparticle force, interfacial energy. A micromanipulation technique has been developed to measure the interaction force between micro ice crystals and plant cells.
The poor reproducibility in secondary pharmaceutical manufacturing is determined mainly by the nature of pharmaceutical powder. My research focuses on improving milling, mixing, granulation, coating through control interfacial interaction, electrostatic force and liquid bridge force.
For fluidization, we use PEPT to reinterpret the effect of bed material, operation and bed design on bubbling and circulation fluidization.
I spent 7 years on solvent extraction, ion exchange, froth flotation and magnetic separation. An example is a chromatography technique developed for copper radioisotope separation. Copper radioisotopes have been used in hospital for nuclear medicine study. Solvent extraction and anion exchange have been used to separate the isotopes for over 30 years. However, the radioisotope product contains 9-10 mg/l nickel, which is too high and put the patients under the risk of chronic disorder diseases. Through controlling the intermolecular force, the technique we developed increases the radioisotope recovery from 70 to 100%, and the Ni in the final products is reduced from 8mg to 0.02mg. It greatly reduces patients risk to chronic disorder diseases.
Find out more:
Dr Xianfeng Fan, School of Engineering profile: http:///www.eng.ed.ac.uk/about/people/dr-xianfeng-fan
Edinburgh Research Explorer: http://www.research.ed.ac.uk/portal/xfan1
Personal web pages: http://www.homepages.ed.ac.uk/xfan1/