Reactive boiling of cellulose for integrated catalysis through an intermediate liquid

@article{Dauenhauer2009ReactiveBO,
  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},
  year={2009},
  volume={11},
  pages={1555-1561}
}
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… Expand
Reactive Liftoff of Crystalline Cellulose Particles
TLDR
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. Expand
Spontaneous Aerosol Ejection: Origin of Inorganic Particles in Biomass Pyrolysis.
TLDR
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. Expand
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 secondaryExpand
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 theExpand
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 toExpand
Visualization of physicochemical phenomena during biomass pyrolysis in an optically accessible reactor
Abstract The thermochemical conversion of biomass via fast pyrolysis requires detailed descriptions of both the kinetic and heat and mass transport rates, which are often in direct competition. ToExpand
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 anExpand
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.Expand
Micro-explosion of liquid intermediates during the fast pyrolysis of sucrose and organosolv lignin
Abstract A new methodology has been proposed to describe of the dynamics of bubble formation during pyrolysis of Organosolv lignin and sucrose (surrogates for biomass) using fast speed visualizationExpand
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,Expand
...
1
2
3
4
5
...

References

SHOWING 1-10 OF 32 REFERENCES
Heat transfer mechanisms and multi-step kinetics in the ablative pyrolysis of cellulose
Abstract A new model is presented of a cellulosic cylinder which thermally degrades, because of a high pressure contact of its bottom side against a hot spinning disk. From the chemical point ofExpand
Radiant flash pyrolysis of cellulose—Evidence for the formation of short life time intermediate liquid species
Abstract This paper reports the first results of experiments and modelling of the radiant flash pyrolysis of cellulose. Small samples are exposed to brief flashes of a concentrated radiation, at theExpand
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 autothermalExpand
On the mechanism of the rapid pyrolysis of cellulose
Abstract Experimental yields and liquid product analyses obtained from the fast pyrolysis of biomass and cellulose in a fluidized bed reactor have been used to demonstrate that the decomposition ofExpand
Flash pyrolysis of cellulose for production of anhydro-oligomers
Evidence is presented showing that it should be possible to depolymerize a purified cellulose to produce anhydro-oligosaccharides containing small numbers of glucosidic units if suitable reactionExpand
Green gasoline by catalytic fast pyrolysis of solid biomass derived compounds.
TLDR
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. Expand
Ablative plate pyrolysis of biomass for liquids
Abstract Ablative pyrolysis is one of a range of fast or flash pyrolysis technologies for the production of liquids in high yields which offers the potential for high reactor specific throughputsExpand
Modelling of flash pyrolysis of a single wood particle.
Reactors for flash pyrolysis of biomass are designed to maximize the yield of bio-oil, at the expense of the by-products gas and char. To understand which chemical and physical factors influence theExpand
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 ofExpand
A unified, global model for the pyrolysis of cellulose
Abstract Complex interactions occur between the many competing and sequential chemical reactions during the pyrolysis of cellulose, making the prediction of the pyrolysis products relativelyExpand
...
1
2
3
4
...