Fluidization, Reactor Design, Electrostatics, PEM Fuel Cells, Pollution Control, Biomass Processing, Green Engineering
Professor
Office:
CHBE 411
Education
University of British Columbia, 1994, Ph.D.
Tsinghua University, China, 1988, M.A.Sc.
Tsinghua University, China, 1985, B.A.Sc.
Research Interests

Green Engineering, Clean Energy and Sustainability: Green engineering is the design, commercialization and use of processes and products, which are feasible and economical while minimizing impacts on ecosystems over the full life-cycle. In contrary to traditional engineering approaches in which both technical and economical aspects of a technology are the focal point, green engineering extends our research and development beyond the manufacturing of the material and product to include the ecological impacts of a process/product or a technology on the renewability and sustainability of the raw materials, the toxicity and health risks during the product use, and the recycleability and degradability at the end of the product use. We have been developing environmental systems analysis and life cycle analysis tools to model and evaluate biomass energy systems, including Canadian wood pellets, animal wastes and agricultural residues, as well as integrated impacts assessment of biomass combustion, gasification, torrefaction and pelletization processes. In collaboration with local fuel cell companies, we also work on the development of core-shell nano electro-catalyst particles for applications in PEM fuel cells. Both clean energy and green engineering will be key areas of my research and teaching in the near future.

Fluidization and Multiphase Reactors: Fluidized bed reactors have been widely used in industrial processes for conducting both catalytic and non-catalytic reactions, fuel combustion, particulate drying, powder coating and granulation, electrolysis etc. I started my research career on fluidization in 1985, and have conducted research over many areas, including hydrodynamics, flow patterns and flow regimes, heat transfer, mass transfer, reactor performance testing, modeling and simulation, scaling and scale-up, commercial reactor trouble-shooting etc. covering gas-solids, liquid-solids, gas-liquid-solids bubbling, turbulent and circulating fluidized beds. My current fluidization research is focused on electrostatic charging of dielectric particles in gas-solids fluidized beds, dual fluidized bed fro biomass steam gasification and novel i-CFB reactors for catalytic NOx reduction.

Publications
  • Guo, W., K. Trischuk, X.T. Bi, C. J. Lim , S. Sokhansanj, Measurements of Wood Pellet Self-heating Kinetic Parameters Using Isothermal Calorimetry, Biomass and Bioenergy, 63, 1-9, 2014.
  • Yazdanpanah, F., S. Sokhansanj, C.J. Lim, A. Lau, X. Bi, P.Y. Lam, S. Melin, Potential for flammability of gases emitted from stored wood pellets, Can. J. Chem. Eng., 92 (4), 603-609, 2014.
  • Ghiasi, B., L. Kumar, T. Furubayashi, C.J. Lim, X.T. Bi, C.S. Kim, S. Sokhansanj, Densified biocoal from woodchips: Is it better to do torrefaction before or after densification? Applied Energy, 134, 133-142, 2014.
  • Ding Y.L., X.T. Bi and D. Wilkinson, Numerical Investigation of the Impact of Two-phase Flow Maldistribution on PEM Fuel Cell Performance, Int. J. Hydrogen Technology, 39 (1), 469-480, 2014.
  • Hejazi, B., J.R. Grace, X.T. Bi and A. Mahecha-Botero, Steam Gasification of Biomass Coupled with Lime-Based CO2 Capture in a Dual Fluidized Bed Reactor: A Modelling Study. Fuel, 117, 1256-1266, 2014.
  • Masnadi, M.S., R. Habibi, J. Kopyscinski, J.M. Hill, X.T. Bi, C.J. Lim, N. Ellis, J.R. Grace, Fuel characterization and co-pyrolysis kinetics of biomass and fossil fuels, Fuel, 117, 1204-1214, 2014.
  • Lam, P.Y, P.S. Lam, S. Sokhansanj, X.T. Bi, C.J. Lim, S. Melin, Effects of pelletization conditions on breaking strength and dimensional stability of Douglas fir pellet. Fuel, 117, 1085-1092, 2014.
  • He, C., X.T. Bi and J.R. Grace, Contact electrification of a novel dual-material probe with charged particulate flow, Powder Technol., 253, 1-9, 2014.
  • Cheng, XX, X.T. Bi, Hydrodynamics measurement and modeling of i-CFB reactors, Powder Technol., 251, 25-36, 2014.
  • Li, T.S., H.Y. Liu, Y. Fan, G. Shi, P. Yuan, X.T. Bi and X.J. Bao, Synthesis of zeolite Y from natural aluminosilicate minerals for fluid catalytic cracking application. Green Chemistry, 14, 3255–3259, 2013.
  • Tooyserkani, Z., S. Sokhansanj, X.T. Bi, C.J. Lim, A. Lau, J. Saddler, L. Kumar, P.S. Lam, S. Melin, Steam treatment of softwood particles to produce torrefied material. Applied Energy, 103, 514-521, 2013.
  • Wang, C.W., J.H. Peng, H. Li, X.T. Bi, C.J. Lim and S. Sokhansanj, Oxidative torrefaction of biomass residues and densification of torrefied sawdust to Pellets, Biore. Technol., 127, 318-325, 2013.
  • Zhang Siduo, Xiaotao Bi, Roland Clift, A Life Cycle Assessment of integrated dairy farm-greenhouse systems in British Columbia. Biore. Technol., 150, 496-505, 2013.
  • Tooyserkani, Z., L. Kumar, S. Sokhansanj, J. Saddler, X.T. Bi, C.J. Lim, A. Lau, S. Melin, SO2-catalyzed steam pretreatment enhances the strength and stability of softwood pellets, Biore. Technol., 130, 59-68, 2013.
  • Yau, TC, M. Cimenti, XT Bi and J. Stumper, Schröder’s Paradox in Fuel Cell Membrane Electrode Assemblies. J. Power Sources, 224, 285-289, 2013.
  • Guo, W., C.J. Lim, X.T. Bi, S. Sokhansanj, Determination of Effective Thermal Properties of Wood Pellets, Fuel, 103, 347-355, 2013.
  • Peng, J.H., X.T. Bi, S. Sokhansanj, C.J. Lim, Torrefaction and Densification of different species of softwood residues. Fuel, 111, 411-421, 2013.
  • Lam, P.S., S. Sokhansanj, X.T. Bi, J. Lim, I. Lam, Mechanical and Compositional Characteristics of Steam-Treated Douglas Fir (Pseudotsuga menziesii L.) during pelletization, Biomass and Bioenergy, 56, 116-126, 2013.
  • Ann Pa, X.T. Bi and S. Sokhansanj, Evaluation of wood pellet application for residential heating in British Columbia based on a streamlined life cycle analysis, Biomass and Bioenergy, 49, 109-122, 2013.
  • X He, AK Lau, S Sokhansanj, CJ Lim, XT Bi, S Melin, T Keddy, Moisture sorption isotherms and drying characteristics of aspen, Biomass and Bioenergy, 57, 161-167, 2013.
  • Peng, J.H., X.T. Bi*, C.J. Lim and S. Sokhansanj, A Study on Density, Hardness and Moisture Uptake of Torrefied Wood Pellets. Energy and Fuels, 27 (2), 967–974, 2013.
  • Cheng X.X. and X.T. Bi, Modeling and simulation of nitrogen oxides adsorption in fluidized bed reactors. Chem. Eng. Sci., 96, 42–54, 2013.
  • Ding, Y.L., X.T. Bi and D. Wilkinson, Two-phase flow impact on fuel cell performances, Chem. Eng. Sci., 100, 445-455, 2013.
  • Ding, Y.L., R. Anderson, X.T. Bi and D. Wilkinson, Simulations of two-phase flow distribution in communicating parallel channels for a PEM Fuel Cell, Int. J. Multiphase Flow, 52, 35-45, 2013.
  • Dubrawski, K., H.T. Bi, J. Chaouki, N. Ellis, J.R. Grace, A. Kantzas, C. Lim. G.S. Patience, T. Pugsley, J.X. Zhu, Traveling column for comparison of invasive and non-invasive fluidization voidage measurement techniques. Powder Technol., 235, 203–220, 2013.
  • Oveisi, E., A. Lau, S. Sokhansanj, C. J. Lim, X.T. Bi, S.H. Larsson, S. Melin, Breakage behavior of wood pellets due to free fall, Powder Technology, 235, 493-499, 2013.
  • Cheng X.X. and X.T. Bi, Fixed bed NOx adorption. Int. J. Chem. React. Eng., 11(1), 1-12, 2013.
  • Zhang, L.F., Hou, J. and X.T. Bi, Triboeletric Charging Behavior of Wood Particles during Pellet Handling Processes” J. Loss Prevention in the Process Industries, 26 (6), 1328-1334, 2013.
  • Naimi, L., S. Sokhansanj, X.T. Bi, C.J. Lim, A.R. Womac, A. Lau, S. Melin, Development of size reduction equations for calculating energy input for grinding lignocellulosic particles, Applied Engineering in Agriculture, 29, 93-100, 2013.

For more publications, visit my Google Scholar Profile.

CHBE 345 Unit Operation II
CHBE 484 Green Engineering Principles and Applications for Process Industries
CHBE 561 Particle Technology
APSC 261 Technologies and Society
CEEN 523 Energy and the Environment
Canadian Academy of Engineering, Fellow
Association of Professional Engineers and Geoscientists of BC (APEGBC), Member
Canadian Society of Chemical Engineers (CSChE), Member
American Institute of Chemical Engineering (AIChE), Member
Tsinghua University, Beijing, China, Guest Professor
China University of Petroleum, Beijing, China, Guest Professor
Beijing University of Chemical Technology, Beijing, China, Guest Professor
CAS Institute of Process Engineering, Beijing, China, Guest Professor
Chongqing University, Chongqing, China, Guest Professor
Huazhong University of Science and Technology, Wuhan, China, Guest Professor
CAS Guangzhou Institute for Energy Conversion, Guangzhou, China, Guest Professor