Location: Conference Room 801 of Energy Building No.2
Time: 2015.09.25 (Friday) 9:00 a.m.
Lecturer: Dr. Xiaotao Bi, Department of Chemical and Biological Engineering & Clean Energy Research Centre， The University of British Columbia Vancouver, BC, Canada
Abstract:
This presentation reports the recent experimental findings in our group on gas-solids and gasp-liquid two-phase flow hysteresis phenomena in spouted bed reactors and PEM fuel cell flow fields/channels. A particle interlocking mechanism for spouted beds and the inhereted two-phase flow stability in parallel channels are proposed and evaluated. The implications and potential applications in design and operation of two-phase flow reactors and fuel cells systems are discussed. The presentation will also share our recent development of a novel internal circulating fluidized bed (i-CFB) reactor for catalytic reduction of NOx in oxygen-rich combustion flue gases using propylene as the reductant and Fe/ZSM-5 as the catalyst. The proposed i-CFB reactor was demonstrated to be effective in addressing the adverse effect of flue gas oxygen by decoupling adsorption and catalytic reaction in two inter-connected zones.
Introduction:
Professor Xiaotao Bi received BASc (1980-1985) and MASc (1985-1988) degrees from Tsinghua University, and a PhD (1991-1994) degree from the University of British Columbia. He worked at the Ohio State University (1989-1991) as a research assistant, University of British Columbia (1994-1995) as a postdoctoral fellow, Ecole Polytechnique de Montreal (1995-1996) as a postdoctoral fellow and the Natural Gas Technologies Centre (1996-1997) as a senior research scientist before he joined UBC as a faculty member in 1997. He served as the associate chair of Chemical and Biological Engineering Department from 2006-2009, and currently as the associate director of the UBC Clean Energy Research Centre (www.cerc.ubc.ca) and manager of the Fluidization Research Centre (www.chbe.ubc.ca/fluidization).
His research has been focused on fluidization and multiphase reactor systems, spanning from turbulent fluidization, fast fluidization, choking and instability, high density circulating fluidized beds, conical spouted beds, pressure waves and fluctuations, flow patterns and regimes transitions, electrostatics in particle systems, as well as novel fluidized bed reactors for NOx reduction, biomass gasification, biomass torrefaction and catalytic combustion of H2/CH4 mixtures. He has also worked on water management in PEM fuel cells, cultivation of genetically modified microalgae in airlift photobioreactors, life cycle analysis of biomass and bioenergy and integration of biomass energy systems. He has published more than 300 peer-reviewed papers, which have been cited more than 6500 times with a current H-index of 40. He also held patents on novel fluidized bed reactors for animal waste treatment, catalytic NOx reduction and electrostatics monitoring. He was the recipient of a 2011 UBC Killam Research Fellowship, the 2012 AIChE Particle Technology Forum Lectureship Award, and the 2014 Teaching Excellence Award of UBC Chemical and Biological Engineering Department.
Contacts: DNL1208 Shasha He(89870)