Reactive boiling of cellulose for integrated catalysis through an intermediate liquid

  title={Reactive boiling of cellulose for integrated catalysis through an intermediate liquid},
  author={Paul J. Dauenhauer and Joshua L. Colby and Christine M. Balonek and Wieslaw J. Suszynski and Lanny D. Schmidt},
  journal={Green Chemistry},
Advanced biomass processing technology integrating fast pyrolysis and inorganic catalysis requires an improved understanding of the thermal decomposition of biopolymers in contact with porous catalytic surfaces. High speed photography (1000 frames per second) reveals that direct impingement of microcrystalline cellulose particles (300 μm) with rhodium-based reforming catalysts at high temperature (700 °C) produces an intermediate liquid phase that reactively boils to vapors. The intermediate… 
Reactive Liftoff of Crystalline Cellulose Particles
Introduction of macroporosity to the heated surface was shown to completely inhibit the cellulose Leidenfrost effect, providing a tunable design parameter to control particle heat transfer rates in industrial biomass reactors.
Spontaneous Aerosol Ejection: Origin of Inorganic Particles in Biomass Pyrolysis.
Large bubble-to-aerosol size ratios and visualization of significant late-time ejections in the pyrolyzing cellulose suggest the formation of film bubbles in addition to the previously discovered jet formation mechanism.
Effect of a Vacuum on the Fast Pyrolysis of Cellulose: Nature of Secondary Reactions in a Liquid Intermediate
Pyrolysis of thin films of cellulose was performed at five pressures from 4 mbar (vacuum) to 1 bar at 500 °C in a modified pyroprobe captive sample reactor designed to minimize gas-phase secondary
Production of aromatics by catalytic fast pyrolysis of cellulose in a bubbling fluidized bed reactor
Catalytic fast pyrolysis of cellulose was studied at 500°C using a ZSM-5 catalyst in a bubbling fluidized bed reactor constructed from a 4.92-cm ID pipe. Inert gas was fed from below through the
Effect of Cellulose Crystallinity on Solid/Liquid Phase Reactions Responsible for the Formation of Carbonaceous Residues during Pyrolysis
This study reports changes in solid phase composition when samples of Avicel cellulose (crystallinity: 60.5%) and ball-milled microcrystalline cellulose (crystallinity: 6.5%) were subjected to
Carbonization of biomass in constant-volume reactors
A novel carbonization process that realizes near-theoretical fixed-carbon yields in ~3 h is presented. Norwegian spruce and birch sawdusts were carbonized in a hermetically-sealed reactor at an
Revealing pyrolysis chemistry for biofuels production: Conversion of cellulose to furans and small oxygenates
Biomass pyrolysis utilizes high temperatures to produce an economically renewable intermediate (pyrolysis oil) that can be integrated with the existing petroleum infrastructure to produce biofuels.
Effect of Pyrolysis Temperature and Sulfuric Acid During the Fast Pyrolysis of Cellulose and Douglas Fir in an Atmospheric Pressure Wire Mesh Reactor
The goal of this study is to better understand important reactions responsible for the suppression of anhydrosugars during the pyrolysis of microcrystalline Avicel, ball-milled Avicel, levoglucosan,
Characterization of Water-Soluble Intermediates from Slow Pyrolysis of Cellulose at Low Temperatures
This study reports the presence of both sugar and anhydro-sugar oligomers of a wide range of degrees of polymerization (1–10) as water-soluble intermediates in the solid residues produced from


Millisecond autothermal steam reforming of cellulose for synthetic biofuels by reactive flash volatilization
Three biomass-to-liquid process steps (volatilization of cellulose, tar-cleaning of organic products, and water-gas-shift of the gaseous effluent) have been integrated into a single autothermal
Green gasoline by catalytic fast pyrolysis of solid biomass derived compounds.
It is reported that gasoline-range aromatics can be produced from solid biomass feedstocks in a single reactor at short residence times (less than 2 min) and intermediate temperatures (400–600 8C) by a method the authors call catalytic fast pyrolysis.
Thermal Effects in Cellulose Pyrolysis: Relationship to Char Formation Processes
The thermochemistry of cellulose pyrolysis has been studied by a combination of differential scanning calorimetry and thermogravimetric analysis. Additionally, the vapor pressure and heat of
Kinetic and Heat Transfer Control in the Slow and Flash Pyrolysis of Solids
The coupled effects of particle size and external heating conditions (reactor heating rate and final temperature) on cellulose pyrolysis are investigated by means of a computer model accounting for
A kinetic model for pyrolysis of cellulose.
It has been shown that the pyrolysis of cellulose at low pressure (1.5 Torr) can be described by a three reaction model. In this model, it is assumed that an “initiation reaction” leads to formation