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Carboxylic Acid Hydrodeoxygenation Over Supported Noble Metal Catalysts, Joshua Gopeesingh
Carboxylic Acid Hydrodeoxygenation Over Supported Noble Metal Catalysts, Joshua Gopeesingh
Dissertations - ALL
Carboxylic acid hydrodeoxygenation (HDO) over supported noble metal catalysts was carried out in order identify the main challenges associated with supported monometallic catalysts and identifying solutions that may increase the practicality of these high activity metals. Using propionic acid as a probe molecule, it was found that supported platinum (Pt) and ruthenium (Ru) catalysts have two main issues: selectivity and stability. Both metals are quite unselective towards HDO products, multiple chemistries occur over the catalysts that lead to a myriad of undesired products. Decarbonylation (DCN) is the most selective pathway over Pt catalysts, while both DCN and methanation chemistries are …
Liquid Phase Modeling In Heterogeneous Catalysis, Mohammad Shamsus Saleheen
Liquid Phase Modeling In Heterogeneous Catalysis, Mohammad Shamsus Saleheen
Theses and Dissertations
Conversion of lignocellulosic biomass into transportation fuels or commodity and specialty chemicals will be an important and fast-growing industry within the United States over the coming decades. Its growth will be driven by a variety of factors, including increased energy demands, environmental considerations, national security, and government mandates. To achieve the desired energy efficiency and economic impact, the emerging biorefining industries need novel heterogeneous catalysts with exceptional activity, selectivity, and stability. Catalytic materials developed in the petrochemical industries are generally not suitable for processing highly functionalized feedstocks typical of the biorefinery landscape. Due to the characteristics of this biomass feedstock …
Hydrodeoxygenation Of Pinyon-Juniper Catalytic Pyrolysis Oil, Hossein Jahromi
Hydrodeoxygenation Of Pinyon-Juniper Catalytic Pyrolysis Oil, Hossein Jahromi
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
Catalytic hydrodeoxygenation (HDO), is an effective process to convert oxygenated compounds to hydrocarbons. This process is widely used for improving the negative properties of biomass-derived pyrolysis oils (bio-oils) such as high acidity, poor stability, and low heating value. During this process oxygen is removed from the bio-oil in the form of water, thus the liquid product of HDO process consists of aqueous phase and hydrocarbon phase that can be easily separated. Synthesis of efficient HDO catalyst has been a major challenge in the field of bio-oil upgrading. Red mud, which is an alkaline waste from alumina industry was used to …
Heterogeneous Catalysis For The Upgrading Of Biomass Derived Chemicals Via Hydrodeoxygenation, Elizabeth Barrow
Heterogeneous Catalysis For The Upgrading Of Biomass Derived Chemicals Via Hydrodeoxygenation, Elizabeth Barrow
Theses and Dissertations
An important step in the upgrading of biomass derived chemicals is the removal of excess oxygen. The works reported here are focused on studying the heterogeneous catalysts that can be utilized for that upgrading through hydrodeoxygenation. This work begins with a discussion of the alkylation of short chain platform chemicals for chain growth and also demonstrates the proof of concept of combining alkylation and hydrodeoxygenation in a single step. Then, because of the promising nature of ReOx- Pd/CeO2 for selective hydrodeoxygenation, a detailed study of ReOx/CeO2 is presented. Finally, a new surface structure interpretation is presented for P/Ni(111) which could …