Pervaporation overview

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Fiber Boards Production from Cynara cardunculus
Without Using Synthetic Resins
Camilo Mancera Arias Supervisor Dr. Francesc
Ferrando Piera Co- Supervisor Dr. Joan Salvadó i
Rovira
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Discussion Topics
Discussion Topics
Outline Steam Explosion Pressing Characterization
Summary
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Introduction
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Cynara cardunculus

• Wild Artichoke
• Native from Mediterranean regions.
• Potentially High energetic properties.
• Source of Lignocellulosic biomass.
• Research group projects association

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Fiber Boards

• Definition
• Agglomeration of fibers
• Adhesives
• Pressure and Temperature

• Classification
• Hard Fiber Boards (800-1000 kg/m3)
• Medium Density Fiber Boards (600-800 kg/m3)
• Semi-hard or light fiber boards (350-600 kg/m3)

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Lignin
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Objectives
Production of fiber boards of commercial quality
from Cynara cardunculus with better ecological
properties.

• Particular
• Chemical characterization
• Steam explosion
• Identification and optimization of relevant
  factors
• Study of other variables, soft grinding,
  exogenous lignin, etc.
• Comparisons

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Work Plan
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Steam Explosion

• Operation conditions
• Water Vapor at 30-40 bars and 160-260 ºC.
• Residence times of few min.

Steam Explosion Reactor

• How it works
• Impregnation
• Flash Expansion
• Extractives and Hemicelluloses Dissolution.
• Fibers Partial Rupture

Pneumatic Valve
Tank
Lay Out Laboratory Scheme
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Pressing
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Characterization of Fiber Boards

• Mechanical Characterization
• Modulus of Rupture
• Modulus of Elasticity
• Internal Bond

• Chemical Characterization
• Ashes
• Lignin
• Cellulose
• Hemicelluloses

• Physical Characterization
• Density
• Water Absorption
• Thickness Swelling

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Target Properties

• Mechanical Properties EU Std
• Modulus of Rupture 40 MPa
• Modulus of Elasticity 3000 MPa
• Internal Bond 0,7 MPa

• Mechanical Properties M. sinensis
• Modulus of Rupture 61,2 MPa
• Modulus of Elasticity 7500 MPa
• Internal Bond 1,8 MPa

• Physical Characterization EU Std
• Density gt 800 kg/m3
• Water Absorption 30
• Thickness Swelling 20

• Physical Characterization M. sinensis
• Density 1100 kg/m3
• Water Absorption 15,3
• Thickness Swelling 5

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Summary
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Ph. D. Student Camilo Mancera Arias Universitat
Rovira i Virgili Tarragona, Spain January
2005 email camilo.mancera_at_urv.net
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