Research on CFD of Fluidization of Biomass Waste Fast Pyrolysis Reactor

2011 ◽  
Vol 201-203 ◽  
pp. 708-713
Author(s):  
Rui Li ◽  
Liang Jing Jing ◽  
Ming Ming He
Keyword(s):  
Solid Phase ◽  
Flow Behavior ◽  
Fast Pyrolysis ◽  
Pilot Scale ◽  
Hydrodynamic Theory ◽  
Pyrolysis Kinetics ◽  
Biomass Waste ◽  
Cold State ◽  
Biomass Resources ◽  
Pyrolysis Reactor

Biomass fast pyrolysis technology is one of most promising methods to utilize biomass resources, for its high production of pyrolysis liquid named bio-oil. And the fast pyrolysis fluidized reactor is widely used because of the advantages of simple structure, and easy to enlarge. The understanding of computational fluid dynamics (CFD) of its fluidized bed is necessary basis for particulate heat transfer and pyrolysis kinetics research. In this paper, modern hydrodynamic theory and calculation means is employed to simulate the cold state of fluid behavior in the pilot-scale fluidized pyrolysis reactor. The simulation results are in good agreement with the empirical equation and experimental data, with resultant error lower than 10%. Based on the cold state simulation, we modeled the fluid flow behavior in the fluidized reactor during fast pyrolysis under high temperature, and calculated the fluidization velocity and the distribution of solid phase fraction.

Pilot-scale catalytic fast pyrolysis of loblolly pine over γ-Al2O3 catalyst

Fuel ◽  
2018 ◽  
Vol 214 ◽  
pp. 569-579 ◽  
Author(s):  
O.D. Mante ◽  
D.C. Dayton ◽  
J.R. Carpenter ◽  
K. Wang ◽  
J.E. Peters
Keyword(s):  
Loblolly Pine ◽  
Fast Pyrolysis ◽  
Pilot Scale ◽  
Catalytic Fast Pyrolysis ◽  
Al2o3 Catalyst

Insight into the role of varied acid-base sites on fast pyrolysis kinetics and mechanism of cellulose

2021 ◽  
Vol 135 ◽  
pp. 140-149
Author(s):  
Chengyu Li ◽  
Jun Zhang ◽  
Jing Gu ◽  
Haoran Yuan ◽  
Yong Chen
Keyword(s):  
Fast Pyrolysis ◽  
Kinetics And Mechanism ◽  
Pyrolysis Kinetics ◽  
Acid Base ◽  
Insight Into

scholarly journals Pilot-scale Columns Equipped with Aqueous and Solid-phase Sampling Ports Enable Geochemical and Molecular Microbial Investigations of Anoxic Biological Processes

BIO-PROTOCOL ◽  
2017 ◽  
Vol 7 (1) ◽  
Author(s):  
Dina Drennan ◽  
Robert Almstrand ◽  
Ilsu Lee ◽  
Lee Landkamer ◽  
Linda Figueroa ◽  
...  
Keyword(s):  
Solid Phase ◽  
Pilot Scale ◽  
Biological Processes ◽  
Phase Sampling

Sulphur Neutralization by Lignite Ash: Pilot-Scale Combustion Experiments

1979 ◽  
Vol 101 (4) ◽  
pp. 615-619 ◽  
Author(s):  
T. D. Brown ◽  
G. K. Lee ◽  
H. A. Bambrough
Keyword(s):  
Nitric Oxide ◽  
Flue Gas ◽  
Solid Phase ◽  
Coal Ash ◽  
Pilot Scale ◽  
Controlled Experiments ◽  
Excess Air ◽  
Nitric Oxide Emissions ◽  
Carry Over ◽  
Lime Addition

A pilot-scale research boiler (750 kg steam/hr) has been used to study the degree of sulphur neutralization during combustion experiments with three lignites. A series of four closely controlled experiments showed that sulphur balances close to 100 percent could be achieved in the pilot-scale system burning Gascoyne lignite; in these experiments the sulphur retained in solid phase residues varied between 21 and 24 percent of the input sulphur. It was also demonstrated with Utility lignite that external recirculation of flue-gas was moderately effective in reducing nitric oxide emissions at the expense of major increased in the carry-over of unburnt carbon. However, sulphur dioxide neutralization by the coal-ash cations remained essentially unchanged as the recirculation ratio increased. Enhancement of sulphur neutralization by dry lime addition to Poplar River lignite was only found to be effective at addition rates above 1/2 percent lime by weight. The effectiveness of the lime was found to increase as the excess-air level increased.

Utilisation of poultry industry wastes for liquid biofuel production via thermal and catalytic fast pyrolysis

2018 ◽  
Vol 37 (2) ◽  
pp. 157-167 ◽  
Author(s):  
Ismail Cem Kantarli ◽  
Stylianos D Stefanidis ◽  
Konstantinos G Kalogiannis ◽  
Angelos A Lappas
Keyword(s):  
Lignocellulosic Biomass ◽  
Poultry Litter ◽  
Fast Pyrolysis ◽  
Fixed Bed ◽  
Pilot Scale ◽  
Biofuel Production ◽  
Fluidised Bed ◽  
Nitrogenous Compounds ◽  
Catalytic Fast Pyrolysis ◽  
Bio Oil

The objective of this study was to examine the potential of poultry wastes to be used as feedstock in non-catalytic and catalytic fast pyrolysis processes, which is a continuation of our previous research on their conversion into biofuel via slow pyrolysis and hydrothermal conversion. Both poultry meal and poultry litter were examined, initially in a fixed bed bench-scale reactor using ZSM-5 and MgO as catalysts. Pyrolysis of poultry meal yielded high amounts of bio-oil, while pyrolysis of poultry litter yielded high amounts of solid residue owing to its high ash content. MgO was found to be more effective for the deoxygenation of bio-oil and reduction of undesirable compounds, by converting mainly the acids in the pyrolysis vapours of poultry meal into aliphatic hydrocarbons. ZSM-5 favoured the formation of both aromatic compounds and undesirable nitrogenous compounds. Overall, all bio-oil samples from the pyrolysis of poultry wastes contained relatively high amounts of nitrogen compared with bio-oils from lignocellulosic biomass, ca. 9 wt.% in the case of poultry meal and ca. 5–8 wt.% in the case of poultry litter. This was attributed to the high nitrogen content of the poultry wastes, unlike that of lignocellulosic biomass. Poultry meal yielded the highest amount of bio-oil and was selected as optimum feedstock to be scaled-up in a semi-pilot scale fluidised bed biomass pyrolysis unit with the ZSM-5 catalyst. Pyrolysis in the fluidised bed reactor was more efficient for deoxygenation of the bio-oil vapours, as evidenced from the lower oxygen content of the bio-oil.

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