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Articles 1 - 9 of 9

Full-Text Articles in Engineering

Pyrolysis Of Fiber-Plastic Waste Blends, Shreyas Kolapkar Jan 2018

Pyrolysis Of Fiber-Plastic Waste Blends, Shreyas Kolapkar

Dissertations, Master's Theses and Master's Reports

The main objective of this work is to investigate fast pyrolysis of fiber and plastic feedstocks in order to understand the synergistic effect from their co-pyrolysis. In this on-going work, fiber, plastic and their blend are characterized and pyrolysis oil is produced from them in the fast batch pyrolysis reactor. Based on a heat transfer model it is shown that results of oil produced from batch reactor will be applicable to the continuous paddle reactor. From feedstock characterization, chlorine was observed particularly in the plastic feedstock. Thus, chlorine removal method using torrefaction and high shear mixing was implemented and was ...


Gasification Of Liquid Sprays In An Entrained Flow Gasifier, Nicholas Ryan Creager Jan 2016

Gasification Of Liquid Sprays In An Entrained Flow Gasifier, Nicholas Ryan Creager

Graduate Theses and Dissertations

In an advancing technological world, gasification is a relatively mature technology that can be refreshed to help achieve sustainable energy production. This thesis discusses the development of a pressurized gasification system that converts bio-oil from fast pyrolysis of red oak into producer gas. Focus will be given to the challenges of operating a pressurized system at high temperature while injecting a non-uniform liquid. Demonstration experiments using methanol resulted in development of experimental methods to show critical nozzle designs and their affects on gasification of liquid jets.

Start up of the bio-oil gasification system was performed using methanol as a model ...


Experimental Investigation Of Fast Pyrolysis Of Arundo Donax In A Novel Paddle Reactor, Chintan Desai Jan 2016

Experimental Investigation Of Fast Pyrolysis Of Arundo Donax In A Novel Paddle Reactor, Chintan Desai

Dissertations, Master's Theses and Master's Reports

The main objective of this research was to show the effectiveness of a novel paddle reactor for fast pyrolysis and study the effect of biomass particle size and reaction temperature of Arundo Donax a type of energy crop on the bio-oil yields. The novel paddle reactor showed effective mixing and heat transfer which were proved with the help of studying the residence time and the heating characteristics of the system respectively. The effect of different biomass particle sizes on the bio-oil yield was not significant, the bio-oil yield was approximately 50% for all the sizes. For Arundo Donax particle sizes ...


Techno-Economic, Uncertainty, And Optimization Analysis Of Commodity Product Production From Biomass Fast Pyrolysis And Bio-Oil Upgrading, Wenhao Hu Jan 2015

Techno-Economic, Uncertainty, And Optimization Analysis Of Commodity Product Production From Biomass Fast Pyrolysis And Bio-Oil Upgrading, Wenhao Hu

Graduate Theses and Dissertations

Advanced biofuel is a promising replacement to fossil fuels for the purpose of protecting the environment and securing national energy supply, but the high cost of producing advanced biofuels makes it not as competitive as petroleum-based fuels. Recent technology developments in biomass fast pyrolysis and bio-oil upgrading introduced several innovative pathways to convert bio-oil into other commodity products, such as bio-asphalt, bio-cement, dextrose and benzene, toluene, xylene (BTX). Before commercializing these products, a comprehensive techno-economic analysis should be employed to examine the economic feasibility of producing them. This thesis compared the economic performance of biofuels, biochemicals, and hydrocarbon chemicals portfolios ...


The Effect Of Process Variables On Pyrolysis In A Freefall Reactor, Preston Gable Jan 2014

The Effect Of Process Variables On Pyrolysis In A Freefall Reactor, Preston Gable

Graduate Theses and Dissertations

The focus of this work is to test variables of fast pyrolysis conditions in a free fall reactor in order to better understand their impact on pyrolysis products, specifically optimization of bio-oil yields. In the first study, a design of experiments was performed and products were analyzed to evaluate the effects of temperature, sweep gas flow rates, and particle heating time, on bio-oil yields. This study proved particle heating time to be a very important variable effecting bio-oil yields, and that a heating time of greater than the traditionally assumed two seconds must be achieved in order to optimize yields ...


Analysis Of Sugars And Phenolic Compounds In Bio-Oil, Marjorie Ruth Rover Jan 2013

Analysis Of Sugars And Phenolic Compounds In Bio-Oil, Marjorie Ruth Rover

Graduate Theses and Dissertations

The overall goal of this research is to develop methods for analyzing and recovering sugars and phenolic compounds from bio-oil. Specific objectives include (1) adapting analytical methods developed for sugar analysis in the food industry to measure total water-soluble sugars in the aqueous phase of bio-oil; (2) adapting analytical methods developed for total phenolic analysis of wine to measure total phenolic content of bio-oil; (3) separate the heavy fraction of bio-oil into a concentrated sugar solution and a phenolic oligomer-rich raffinate; and (4) determine the effect of pyrolysis temperature on the yield of sugars and phenolic compounds in bio-oil.

Recent ...


Development Of A Co-Firing Fuel From Biomass-Derived Binder And Crushed Coal, Andrew Friend Jan 2013

Development Of A Co-Firing Fuel From Biomass-Derived Binder And Crushed Coal, Andrew Friend

Graduate Theses and Dissertations

The focus of this work was the development of a co-firing boiler fuel for use in the coal power plant industry. This fuel, known as co-fire pellets, is a densified product comprised of crushed coal and a renewable binder derived from the liquid product of the fast pyrolysis of lignocellulosic biomass. The co-fire pellets can help meet certain state and federal regulations related to electricity production. A central composite design of experiments was used to evaluate properties of the co-fire pellets based on four factors relating to the makeup of the pellets. These factors are coal particle size, coal moisture ...


Development Of A Lab-Scale Auger Reactor For Biomass Fast Pyrolysis And Process Optimization Using Response Surface Methodology, Jared Nathaniel Brown Jan 2009

Development Of A Lab-Scale Auger Reactor For Biomass Fast Pyrolysis And Process Optimization Using Response Surface Methodology, Jared Nathaniel Brown

Graduate Theses and Dissertations

A lab-scale biomass fast pyrolysis system was designed and constructed based on an auger reactor concept. The design features two intermeshing augers that mix biomass with a heated bulk solid material that serves as a heat transfer medium. A literature review, engineering design process, and shake-down testing procedure was included as part of the system development.

A response surface methodology was carried out by performing 30 experiments based on a four factor, five level central composite design to evaluate and optimize the system. The factors investigated were: (1) heat carrier inlet temperature, (2) heat carrier mass feed rate, (3) rotational ...


Design, Optimization And Evaluation Of A Free-Fall Biomass Fast Pyrolysis Reactor And Its Products, Cody James Ellens Jan 2009

Design, Optimization And Evaluation Of A Free-Fall Biomass Fast Pyrolysis Reactor And Its Products, Cody James Ellens

Graduate Theses and Dissertations

The focus of this work is a radiatively heated, free-fall, fast pyrolysis reactor. The reactor was designed and constructed for the production of bio-oil from the fast pyrolysis of biomass. A central composite design of experiments was performed to evaluate the novel reactor by varying four operating conditions: reactor temperature, biomass particle size, carrier gas flow rate and biomass feed rate. Maximum bio-oil yields of 72 wt % were achieved at a heater set point temperature of 600 yC, using particle sizes of 300 micron, carrier gas flow rates of 4 sL/min and Red oak biomass feed rates of 1 ...