Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 28 for “"corn ethanol"”.
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Application Of The Competitive Storage Model To Us Corn Ethanol Policy
… terms of increasing price levels and volatility. Corn ethanol policy in the United States has created new price linkages between the corn, ethanol, and gasoline markets. Grain storage has the ability to mitigate price volatility. Thus, a better understanding of grain storage in the new environment …
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Prospects for increased low-grade bio-fuels use in home and commercial heating applications
… such as wood-pellets, switchgrass-pellets, and corn can displace up to 2% of the U.S. petroleum market through displacing oil used in home and commercial heating. Current technologies are inexpensive enough to enable consumers to save money by heating with solid bio-fuels instead of oil. …
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The grass is half-full : new biofuels from field to wheel
… market in the United States is dominated by ethanol made from corn. But corn ethanol has limitations that will prevent it from displacing a large amount of fossil fuel use in the U.S. To achieve that goal, biofuels will need to come from different sources. Cellulose, one of the main …
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Reducing the energy demand of bioethanol through salt extractive distillation enabled by electrodialysis
… fuels in the U.S. in 2022: 56.8 GL/year of corn-ethanol, 60.6 GL/year of second generation biofuels such as cellulosic ethanol, and 18.9 GL/year of advanced biofuels such as biomass-based diesel. One of the several challenges when a biochemical conversion technique is used to produce …
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Effects of compositional variables on fouling behavior of thin stillage
In the US, ethanol is produced primarily from corn. There are two major commercial processes: corn wet milling (CWM) and dry grind corn (DGC). The DGC industry has grown and made 86% of corn ethanol by the end of 2008. During DGC processing, after distillation, the remaining nonfermentable material …
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Characteristics of heat transfer fouling of thin stillage using model thin stillage and evaporator concentrates
The US fuel ethanol demand was 50.3 billion liters (13.3 billion gallons) in 2012. Corn ethanol was produced primarily by dry grind process. Heat transfer equipment fouling occurs during corn ethanol production and increases the operating expenses of ethanol plants. Following ethanol distillation, …
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Evaluating the potential of phosphorous recovery from wet milling and dry grind corn facilities using chemical precipitation
… and energy flows. Majority of domestic ethanol production in United States uses corn as its raw material. The co-products produced during the corn-ethanol production such as distillers grain (dry milling) and corn gluten feed (wet milling) are utilized as animal feed. About 50 - 80 % of …
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Using the greet model to analyze algae as a feedstock for biodiesel production
… in renewable, carbon-neutral biofuels such as ethanol and biodiesel. A life-cycle analysis is conducted in this study to determine the viability of using algae as a feedstock for biodiesel. The method involves assessing energy use, fossil fuel use, greenhouse gas emissions, and criteria …
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Life cycle analysis of hybrid poplar trees for cellulosic ethanol
… hybrid poplars as a biomass crop for cellulosic ethanol. A "Life Cycle Assessment" (LCA) methodology is used to systematically evaluate the hybrid poplar's energy input and output as well as greenhouse gas (GHG) emissions. The system boundary is divided into three sections, agriculture, …
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Sustainable Farming Versus Ethanol: A Comparison of Energy Use
<p>The subsidization of corn-ethanol has proven to not live up to the original promises made when it was promoted as gasoline additive. With research pointing to ethanol as a source of increased greenhouse gases emissions and other pollution while merely changing energy consumption, not decreasing …
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Protease Use In Ethanol Production From Dry Fractionated Corn
Fractionating the corn kernel to separate endosperm from germ and pericarp improves corn ethanol processing by increasing fermentation throughput and generating salable coproducts. One such technology, dry fractionation, suffers from loss of germ derived nutrients and amino acids, resulting in poor …
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Three essays on biofuel, weather and corn yield
… standards (RFS) and its impact on biofuel and corn prices, and the impacts of weather and soil moisture on corn yield in the Midwest. Chapter 2 illustrates the hierarchical competition of U.S. corn ethanol, Brazilian sugarcane ethanol and biodiesel to meet the RFS mandates and explained the …
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Fueled by crisis : U.S. alternative fuel policy, 1975-2007
… the powerful industry lobbies (oil, coal, corn, ethanol) nor the public interest groups (environment) had previously advocated for interventions of this scope and scale. This presents a fundamental empirical puzzle for public policy scholars, as it contradicts our understanding of the …
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A Real Options Valuation of Renewable Energy Projects
… throughout the analysis. A simplified model of a corn ethanol plant is analyzed using a simple Margrabe exchange option as well as numerical techniques such as bootstrapping and finite difference methods for solving partial differential equations. It is determined that, as correlation between corn …
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Hydrothermal Process for Bioenergy Production From Corn Fiber and Swine Manure
… concerns about the net energy balance of corn ethanol, food prices, and efficiency of the corn milling process, other types of liquid fuels such hydrocarbons from thermochemical conversion of biomass have become potentially promising. This study aims at investigating the oil-formation …
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Costs of maintaining the conservation reserve program in Illinois in the presence of biofuels
… Illinois over 2007-2020 under exogenously given ethanol prices. We conduct the analysis under three policy scenarios, including the existing CRP policy and two modified policies that provide subsidies to induce energy crop production on expiring CRP land. We also explore the mix of biofuels …
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Organic acids bioproduction from corn fiber using Actinobacillus succinogenes
… on LA production, and LA bioproduction from corn fiber (CF) hydrolysates using A. succinogenes. CF is a byproduct of the dry grind corn ethanol process and has minimal lignin and high polysaccharide content. To produce SA and LA, CF was pretreated and hydrolyzed using enzyme. The hydrolysates …
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Life Cycle Environmental and Cost Evaluation of Bioenergy Systems
… examines implications of replacing gasoline with ethanol for use in California’s light-duty vehicle fleet to meet the State’s Low Carbon Fuel Standard (LCFS). The Ontario studies show that, relative to coal-based electricity generation, electricity generated from co-firing 10% (energy input) …
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Effects of nitrogenous substances on heat transfer fouling using model thin stillage fluids
… and potential fluid contamination. In the corn ethanol industry, fouling occurs when thin stillage is concentrated into condensed distillers solubles. Several researchers have investigated operating conditions and constituents’ influence on fouling characteristics. However, understanding …
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Characterization of amylose lipid complexes and their effect on the corn dry grind process
… the most commonly used method for production of corn ethanol. Ethanol from corn is the biggest contributor to bioethanol produced in the US. In this study, effects of different parameters such as liquefaction temperature, solids content and particle size on formation of amylose lipid complexes …
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