Open Access. Powered by Scholars. Published by Universities.®
Articles 1 - 5 of 5
Full-Text Articles in Engineering
Characterization Of Lignin Structural Variability And The Associated Application In Genome Wide Association Studies, Nathan D. Bryant
Characterization Of Lignin Structural Variability And The Associated Application In Genome Wide Association Studies, Nathan D. Bryant
Doctoral Dissertations
Poplar (Populus sp.) is a promising biofuel feedstock due to advantageous features such as fast growth, the ability to grow on marginal land, and relatively low lignin content. However, there is tremendous variability associated with the composition of biomass. Understanding this variability, especially in lignin, is crucial to developing and implementing financially viable, integrated biorefineries. Although lignin is typically described as being comprised of three primary monolignols (syringyl, guaiacyl, p-hydroxyphenyl), it is a highly irregular biopolymer that can incorporate non-canonical monolignols. It is also connected by a variety of interunit linkages, adding to its complexity. Secondary cell wall …
Understanding Lignin’S Fast Pyrolysis Through Examination Of The Thermolysis Mechanisms Of Model Oligomers, Ross Wesley Houston
Understanding Lignin’S Fast Pyrolysis Through Examination Of The Thermolysis Mechanisms Of Model Oligomers, Ross Wesley Houston
Doctoral Dissertations
The lignocellulosic biorefinery is a visionary concept that endeavors to provide an alternative to fossil-based refineries by producing biobased fungible fuels and specialty chemicals almost exclusively derived currently from petroleum refineries. This vision of the lignocellulosic biorefinery can only be realized if all fractions of lignocellulosic biomass are efficiently deconstructed and valorized to generate a diverse portfolio of products to sustain it against market vicissitudes. Of the three main structural constituents of lignocellulosic biomass (i.e., cellulose, hemicellulose, and lignin), lignin is underutilized despite being the most abundant renewable source of aromatic platform chemicals, representing a growing 250 billion dollar market. …
Stretching The Applications Of Biomass: Development Of Lignin Based Thermoplastic Elastomers And Composite Materials, Anthony Stephen Bova
Stretching The Applications Of Biomass: Development Of Lignin Based Thermoplastic Elastomers And Composite Materials, Anthony Stephen Bova
Doctoral Dissertations
Bio-based plastics and composites have seen increased industry adoption in recent years due to growing demand for materials with a low carbon footprint. The use of lignin as a feedstock for polymers has seen growing interest as the concept of an integrated cellulosic biorefinery gains traction and advances the need to use all components of separated biomass for value-added applications. Historically, use of lignin in thermoplastic and elastomeric copolymers and blends has been bottlenecked by the inability to introduce lignin content above 30 weight percent due to difficulties with interfacial adhesion of lignin with other soft segments. Efforts to overcome …
A Study Of Lignin And Lignin Models In Chemical And Electrochemical Systems, Luke Thomas Servedio
A Study Of Lignin And Lignin Models In Chemical And Electrochemical Systems, Luke Thomas Servedio
Doctoral Dissertations
The use of biomass as a viable, renewable feedstock for the production of energy and as a surrogate for the petrochemical industry has generated a tremendous amount of research over the last 40 years. With lignin comprising 25- 35% by weight of the dry mass of much of that material, much time and energy has been devoted to investigating a viable, scalable value-added proposition for the use of lignin and lignin pre-cursor materials. The bulk of lignin produced today comes as a by-product of the de-pulping process in the production of paper – most of which is used as a …
Production Of Renewable Chemicals And Energy From Waste Biomass, Sheng Chu
Production Of Renewable Chemicals And Energy From Waste Biomass, Sheng Chu
Doctoral Dissertations
With the rapid growth of world population and developing industries, the production of wastes has dramatically increased in the past decades. Due to environmental concerns and limited landfill space, the disposal of wastes has been subjected to strict regulations. Beneficial uses of wastes such as recycling/reuse, land applications, energy production, and resource recovery have been advocated greatly. This thesis presents the utilization of two types of solid waste: lignin and waste paper/plastic. Through thermochemical conversion, wastes can be converted to chemicals and energy. This aims at reducing the energy dependence on fossil fuels while achieving effective waste management. Lignin is …