scholarly journals Reusability of Ni2Fe3 Metal Catalyst for Upgrading Pyrolyzed Bio-Oil from Cellulose

2021 ◽  
Vol 333 ◽  
pp. 12005
Author(s):  
Siyi Li ◽  
Jeffrey S. Cross
Keyword(s):  
Catalytic Property ◽  
Biomass Conversion ◽  
Metal Cluster ◽  
Catalyst System ◽  
Model Catalyst ◽  
Metal Catalyst ◽  
Bio Oil ◽  
Recyclable Catalysts ◽  
Repeated Use ◽  
Pyrolysis Of Biomass

Recyclable catalysts are desperately needed for upgrading pyrolyzed bio-oil which is produced from biomass conversion in order to reduce cost and protect the environment. However, most catalysts used for producing bio-oil from the pyrolysis of biomass cannot be recycled, leading to costly catalyst regeneration or waste if disposed of. In this study, Ni2Fe3 has been chosen as the model catalyst to test the recyclable property of the metal cluster catalyst system. Cellulose is used as the biomass model reactant. The results from pyrolysis experiments and GC-MS show that the catalytic property of Ni2Fe3 remains constant even after repeated experiments. From the analysis of bio-oil by GC-MS, the catalyst even shows slightly better performance with repeated use due to the pyrolytic interaction with cellulose during the experiment.

Experimentally Derived Arrhenius Coefficients for the Reaction Modeling of Fast Pyrolysis

2010 ◽  
Author(s):  
J. Rhett Mayor ◽  
Alexander Williams
Keyword(s):  
Pinus Taeda ◽  
Large Scale ◽  
Biomass Conversion ◽  
Fast Pyrolysis ◽  
Molecular Structures ◽  
Temperature History ◽  
Bulk Reaction ◽  
Bio Oil ◽  
Mass Conversion ◽  
Pyrolysis Of Biomass

The search for fossil fuel alternatives has been one of increasing interest in recent years and one method which shows evidence of feasibility on a large scale is the production of bio-oil through the pyrolysis of biomass. In order to mathematically characterize biomass pyrolysis reactions for the purpose of process modeling, reaction descriptors in the form of Arrhenius coefficients are frequently utilized. Due to the complexity and inhomogeneity of biomass molecular structures, strictly analytically derived Arrhenius coefficients are not capable of predicting pyrolysis behaviors and outcomes. Typically thermogravimetric analysis (TGA) is employed as a method of extracting mass conversion data as a function of temperature from which bulk reaction descriptors following the form of Arrhenius reaction coefficients are derived. The preceding time and temperature history, however, will have a significant impact on the biomass conversion processes at each subsequent data point. This renders derived process predictors from TGA incapable of approximating fast pyrolysis reactions which have a markedly different time and temperature history than is seen utilizing TGA methods. Experimentally derived reaction descriptors of the Arrhenius form for the fast pyrolysis of biomass have been investigated utilizing a novel isothermal fast pyrolysis reactor. Multiple reaction durations and reaction temperatures for Pinus Taeda were tested resulting in measurements of biomass conversion. Reaction coefficients derived from the data are compared to coefficients derived utilizing TGA data and their predictions for mass conversion are contrasted.

Investigation Into the Effects of Reaction Duration on the Isothermal Fast Pyrolysis of Biomass

2009 ◽  
Author(s):  
J. Rhett Mayor ◽  
Alexander Williams
Keyword(s):  
Loblolly Pine ◽  
Energy Content ◽  
Biomass Conversion ◽  
Fast Pyrolysis ◽  
Residence Times ◽  
Heating Rates ◽  
Reaction Duration ◽  
Bio Oil ◽  
Pyrolysis Of Biomass ◽  
Conversion Efficiencies

Bio-oils were produced within a fast-pyrolysis micro-reactor at 400°C from Loblolly Pine (Pinus Taeda) with varying residence times. This preliminary study has considered two boundary values for the residence time, evaluating the products of the reaction at 20 seconds and 120 seconds. The collected bio-oils were analyzed for their calorific values (LHV) and biomass conversion efficiencies. Heating rates greater than 100°C/s were achieved for the biomass, allowing for isothermal conditions to exist throughout the majority of the reaction despite short residence times. This study shows the effect that reaction duration has on the mass of the bio-oil yield and energy content present for the isothermal fast pyrolysis of Loblolly Pine and evaluates the predictive capabilities of TGA derived Arrhenius coefficients.

Microwave Induced Pyrolysis of Biomass

2013 ◽  
Vol 319 ◽  
pp. 127-133 ◽  
Author(s):  
Kai Qi Shi ◽  
Tao Wu ◽  
Hai Tao Zhao ◽  
Edward Lester ◽  
Philip Hall ◽  
...  
Keyword(s):  
Microwave Heating ◽  
Biomass Conversion ◽  
Operating Conditions ◽  
Gas Chromatograph ◽  
Volumetric Heating ◽  
Gaseous Products ◽  
Bio Oil ◽  
Conventional Pyrolysis ◽  
The Difference ◽  
Pyrolysis Of Biomass

Microwave heating has attracted much attention recently due to its nature of volumetric heating and instant heating. In this study, microwave heating was adopted not only as a heating method but also an approach to enhance the pyrolysis of biomass. Microwave induced pyrolysis was carried out at 500°C with silicon carbide as a microwave energy absorber. Conventional pyrolysis of gumwood was also conducted under the same operating temperature as microwave-enhanced pyrolysis. The yields of pyrolytic bio-oil and bio-gas under microwave heating are 8.52 wt% and 73.26 wt% respectively, which are higher than the products obtained via conventional methods under similar operating conditions. A series tests were performed to compare the difference between the yields of pyrolytic products, i.e. gaseous products (bio-gas), liquid products (bio-oil) and solid products( bio-char). Scanning Electron Microscope (SEM), Gas Chromatograph/Mass Spectrum (GC-MS) and Gas Chromatograph (GC) were used in this study to characterize the morphology of bio-chars, the composition of bio-gas and bio-oil respectively. The bio-oil produced via microwave pyrolysis has simpler constituents compared with that produced via conventional pyrolysis. The proportion of syngas (H2+CO) and methane (CH4) in the gas product produced under microwave-enhanced pyrolysis are 62.52 vol % and 22.41vol % respectively, which are higher than those in the products of conventional pyrolysis. It is clear that microwave-enhanced pyrolysis has shown a great potential as an alternative method for biomass conversion.

RANCANG BANGUN PERANGKAT EKSPERIMENTASI PROSES PIROLISIS BIOMASA GELOMBANG MIKRO

2013 ◽  
Vol 14 (2) ◽  
Author(s):  
Noor Fachrizal
Keyword(s):  
Large Scale ◽  
Continuous Model ◽  
Biomass Energy ◽  
Scale Model ◽  
Small Scale ◽  
Laboratory Apparatus ◽  
Liquid Form ◽  
Large Scale Model ◽  
Bio Oil ◽  
Pyrolysis Of Biomass

Biomass such as agriculture waste and urban waste are enormous potency as energy resources instead of enviromental problem. organic waste can be converted into energy in the form of liquid fuel, solid, and syngas by using of pyrolysis technique. Pyrolysis process can yield higher liquid form when the process can be drifted into fast and flash response. It can be solved by using microwave heating method. This research is started from developing an experimentation laboratory apparatus of microwave-assisted pyrolysis of biomass energy conversion system, and conducting preliminary experiments for gaining the proof that this method can be established for driving the process properly and safely. Modifying commercial oven into laboratory apparatus has been done, it works safely, and initial experiments have been carried out, process yields bio-oil and charcoal shortly, several parameters are achieved. Some further experiments are still needed for more detail parameters. Theresults may be used to design small-scale continuous model of productionsystem, which then can be developed into large-scale model that applicable for comercial use.

In-situ catalytic upgrading of bio-oil from rapid pyrolysis of biomass over hollow HZSM-5 with mesoporous shell

2021 ◽  
Vol 341 ◽  
pp. 125874
Author(s):  
Nichaboon Chaihad ◽  
Aisikaer Anniwaer ◽  
Aghietyas Choirun Az Zahra ◽  
Yutaka Kasai ◽  
Prasert Reubroycharoen ◽  
...  
Keyword(s):  
Catalytic Upgrading ◽  
Bio Oil ◽  
Mesoporous Shell ◽  
Pyrolysis Of Biomass ◽  
Rapid Pyrolysis

Fast Pyrolysis of Biomass in Pyrolysis Gas: Fractionation of Pyrolysis Vapors Using a Spray of Bio-oil

2012 ◽  
Vol 26 (5) ◽  
pp. 2962-2967 ◽  
Author(s):  
Chih-Chiang Chang ◽  
Seng-Rung Wu ◽  
Chi-Cheng Lin ◽  
Hou-Peng Wan ◽  
Hom-Ti Lee
Keyword(s):  
Fast Pyrolysis ◽  
Pyrolysis Gas ◽  
Bio Oil ◽  
Pyrolysis Of Biomass

scholarly journals Production and Characterization of Bio-oil from Bio-mass by Circulating Fluidized Bed Pyrolysis Reactor

1970 ◽  
Vol 46 (3) ◽  
pp. 313-322 ◽  
Author(s):  
ATMK Hasan ◽  
M Mohiuddin ◽  
MB Ahmed ◽  
IJ Poly ◽  
M Asadullah ◽  
...  
Keyword(s):  
Fluidized Bed ◽  
Circulating Fluidized Bed ◽  
Biomass Conversion ◽  
Fixed Bed ◽  
Acid Value ◽  
Reactor System ◽  
Efficient Production ◽  
Bottom Part ◽  
Bio Oil ◽  
Pyrolysis Reactor

The objective of the present work is to install a modified suitable and compatible reactor system for the efficient production of renewable liquid fuel (bio-oil) from agro-based bio-mass. This new type of reactor system contains a combustor connected with the upper end of the reactor chamber. The bottom end of the reactor is connected with the bottom part of the combustor by a stainless steel pipe through which hot sand is circulated by the force of air pump. Thus, effective heat transfer from the continuously circulated heated sand as well as efficient biomass conversion into the reactor can be obtained. In this work, jute stick and bagasse abundantly available in Bangladesh were pyrolyzed separately in a continuous feeding circulating fluidized bed reactor at around 500°C for bio-oil production. The total bio-oil yields from bagasse and jute stick were about 69.5 wt% and 68.2 wt% respectively, which are higher than the yields obtained from fixed bed pyrolysis reactor. The total yields of char contents were 19.4 wt% and 21.7wt% after complete pyrolysis of bagasse and jute stick respectively, which are less than that of char yields obtained from fixed bed pyrolysis reactor. Physical and chemical analyses of bio-oils were carried out by conventional methods. The density, viscosity, pH, acid value, water, lignin, solid and ash contents of bio-oils obtained from both jute stick and bagasse were found to be 1.1 g/cc, 3.1 cp, 4.1, 126.3 mgKOH/g, 14.0 wt%, 2.5wt%, 0.05wt%, 0.03wt%, and 1.12 g/cc, 3.2cp, 4.0, 127.1 mgKOH/g, 13.0 wt%, 2.5wt%, 0.015wt%, 0.025wt%, respectively. Key words: Renewable energy; Bio-mass; Bio-oil; Pyrolysis; Fluid bed circulating reactor DOI: http://dx.doi.org/10.3329/bjsir.v46i3.9036 BJSIR 2011; 46(3): 313-322

scholarly journals Fixed bed pyrolysis of biomass solid waste for bio-oil

2017 ◽  
Author(s):  
Mohammad Nurul Islam ◽  
Mohamed Hairol Md Ali ◽  
Miftah Haziq
Keyword(s):  
Solid Waste ◽  
Fixed Bed ◽  
Bio Oil ◽  
Pyrolysis Of Biomass
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