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Mike Buchanan
Research Scientist II
Phone (404) 894-5338
mike.buchanan@ipst.gatech.edu

BLACK LIQUOR EVAPORATORS AND HIGH SOLIDS CONCENTRATORS
  Black liquor analysis: Critical solids content
Black liquor analysis: Elemental Analysis
Black liquor analysis: Fiber content
Black liquor analysis: Inorganic composition
Black liquor analysis: Soap content
Black liquor analysis: Total solids content
FORESTRY
  Chemical Analysis:
   • Wood
   • Female Gametophyte Tissue
   • Embryo Tissue
   • Tissue Culture Media
RECOVERY BOILER
  Black liquor analysis:
   • Elemental analysis
   • Heating value
   • Total solids content
TESTING
  Chemical characterization of machine deposits, evaporator scale and product contaminants
Chemical characterization of wood, pulp and paper
Chromatographic, spectroscopic, and wet chemical techniques including FTIR, HPLC, GC, GC/MS, ICP, ion chromatography, capillary ion electrophoresis, elemental analysis, calorimetry, potentiometry, titrimetry, and gravimetry
Contaminant/particle and defect identification
Defect analysis
Laboratory quality systems
Methods development
Specification testing
White, green, and black liquor testing

Xin-Sheng Chai
Senior Research Scientist
Ph.D., Royal Institute of Technology, Sweden,
   1996

Phone (404) 894-9992
xinsheng.chai@ipst.gatech.edu

DEINKING
  Closed cycle papermaking
PROC ESS CONTROL
  On-line/in-line chemical process monitoring in pulp and paper industry
RECYCLE
  Chloride and other non-process elements and their behavior in the recovery cycle
VOC'S AND WOOD DRYING
  Vapor-liquid partitioning of VOC's in mill streams with applications to stripping
Emissions of methanol and other VOC's
TESTING
  Laboratory and on-machine measuring instrumentation

Charles Courchene
Senior Research Engineer
M.EnS., Miami University, 1978
Phone (404) 894-7860
charles.courchene@ipst.gatech.edu
BLEACHING
  Bleaching
Chlorine dioxide bleaching
ECF bleaching
Environmental aspects of bleaching
Improving bleachability of kraft pulp
Oxygen bleaching
TCF bleaching
FIBER PROPERTIES
  Fiber Measurement
Fiber Properties
Structure and properties of wood pulp fibers
FORMING
  Laboratory simulation of subprocesses to clarify active mechanisms and characterization of stock or web properties
Micellaneous
Equipment manufacture
Vessel Picking
PULPING
  Bleached chemical pulp manufacturing technology
Bleaching mechanical pulp
Chemical pulp production, strength and yield
Effects of pulping and bleaching on fiber properties
Kraft pulping
Kraft pulping uniformity - effect of heat and mass transfer, and kinetics
Modified kraft pulping
Polysulfide pulping
Pulp washing
Wood quality
Yield improvement of chemical pulps
RECYCLE
  Bleaching recycled paper
Wastepaper processing
STOCK PREPARATION
  Refining
  Stock preparation
TESTING
  Microscopy (TEM, SEM, confocal scanning laser microscope, LM)

Nikolai DeMartini
Research Engineer
Phone (404) 385-7054
nikolai.demartini@ipst.gatech.edu
BLACK LIQUOR EVAPORATORS AND HIGH SOLIDS CONCENTRATORS
 

Black liquor characterization:
   • Critical solids content
   • Fouling tendency
Hard Scale Fouling
Calcium Deactivation
Scaling Problems
Troubleshooting

ENVIRONMENTAL (MILL CLOSURE)
 

Chloride and potassium removal
Control of non-process elements

RECAUST OPERATIONS
 

Green liquor line deposits

RECOVERY BOILER
 

Black liquor combustion
Recovery boiler fouling and plugging

RECYCLE
 

Chloride and other non-process elements and their behavior in the recovery cycle


E-Jiang Ding
Research Scientist II
Phone (404) 894-9769
ejiang.ding@ipst.gatech.edu
 

Kristiina Iisa
Principal Research Engineer
Chemical and Biomolecular Engineering
PhD, Abo Akademi University, 1993
Phone (404) 894-5757
kristiina.iisa@ipst.gatech.edu
 

Roman Popil
Senior Research Scientist
Ph.D., University of British Columbia, 1984
Phone (404) 894-9722
roman.popil@ipst.gatech.edu
CORRUGATING
  Corrugator instrumentation development
Evaluation of wax replacement coatings
Optimization of corrugated structures and corrugating processes
Predictive models of ECT, BCT based on correspondences to component physical properties
FIBER PROPERTIES
  Paper physics
FORMING
  Formation measurement and characterization
Formation and fiber physics, theory of paper formation
Fourdrinier table activity evaluation and optimization for formation
Laboratory simulation of subprocesses to clarify active mechanisms and characterization of stock or web properties
Layering, structure, starch and/or porosity distribution
On-machine trials: twin former blade styles
Paper dimensional stability
Stree analysis
Ultrasonic nondestructive testing, paper grinding, and simulated aging studies
INSTRUMENTATION
  Laser ultrasonic laboratory instruments for bending stiffness measurement of paper and paperboard
Measurements and specialized instrumentation for paper surface quality, hygroexpansivity
On-line measurements and characterization of pulp dirt and calender roll roughening
MISCELLANEOUS
  Fracture mechanics in paper
PAPER PROPERTIES
  Formation measurements
Measurement of fiber creep and surface nonuniformity of paper
Measurements of compressibility
Mechanical properties of paper Brentholt effect
Paper physics
Paper properties
Stiffness
Structure and properties of paper
Web properties
PAPERMAKING
  Coating pilot plant trials, evaluation of coating structures: uniformity, z -profiles
Headbox/paper machine trouble-shooting through paper analysis of CD profiles of stiffness orientation
Paper testing and test methods, analysis and interpretation of paper property physical test data
PROCESS CONTROL
  Design of processes and strategies for cost effective surface finishing
Instrumentation and sensors for measurement of paper properties
Laboratory and on-machine measurement instrumentation, industrial separation technologies
Micro Electro Mechanical Systems (MEMS) sensors
Nondestructive ultrasonic testing, power ultrasonics, signal processing, fluid dynamics, optics, and instrumentation design
Non contact measurement of paper stiffness
On-line sensor development and implementation for caliper, color, formation, surface roughness, gloss
Optical sensors
Paper finishing mathematical modelling and pilot plant calendering trials
Ultrasonic sensors and instrumentation development for on-line measurement of the mechanical properties of paper
Property measurement for process control
Ultrasonics
PRINTABILITY
  Image analysis techniques for print quality, mottle, dot quality
Paper surface characterization for printing, density/roughness/gloss relationships
TESTING
  Fracture mechanics in paper
Laboratory and on-machine measuring instrumentation

Michael Schaepe
Senior Research Engineer
B.S., University of Wisconsin - Green Bay, 1978
Phone (404) 894-6640
michael.schaepe@ipst.gatech.edu
CONVERTING
  Adhesive Green Bond Performance
Combined Board
Corrugating
Experimental Materials
CORRUGATING
  Combined Board Manufacturing and Converting
Corrugating
Corrugating Adhesives
Experimental Design
Experimental Materials
Medium and Linerboard Runnability
Pilot Plant Operations
FORMING
  Papermaking and the Effects of Paper Properties on Converting
PAPER PROPERTIES
  Combined Board Testing and Performance
Creep Testing and Performance
Paper Testing and Evaluation
PAPERMAKING
  Containerboard Productions and Performance
Experimental Design
Experimental Materials
Pilot Plant Operations

Scott Sinquefield
Senior Research Engineer
Phone (404) 385-0241
scott.sinquefield@ipst.gatech.edu
RECOVERY BOILER
  Gasification of Black Liquor
Recovery boiler fume and carryover

Quinhui Sun
Research Scientist I
Phone (404) 894-7824
quinhui.sun@ipst.gatech.edu
 

Rallming Yang
Research Scientist I
Ph.D., State University of New York at Syracuse
Phone (404) 894-5306
rallming.yang@ipst.gatech.edu
TESTING
  Chemical characterization of machine deposits, evaporator scale and product contaminants
Chemical characterization of wood, pulp and paper
Chromataographic, spectroscopic, and wet chemical techniques including FTIR, HPLC, GC, GC/MS, ICP, icon chromatography, capillary ion electrophoresis, elemental analysis, calorimetry, potentiometry, titrimetry, and gravimetry
Competitive analysis
Contaminant/particle and defect identification
Defect analysis
Laboratory quality systems
Methods development
White, green and black liquor testing
WOOD CHEMISTRY
  Chemical fundamentals of lignin and carbohydrate degradation reactions during Pulping and bleaching
Pulping with catalysts
Wood chemistry
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