{"id":134,"date":"2015-05-04T09:32:28","date_gmt":"2015-05-04T09:32:28","guid":{"rendered":"http:\/\/owwwlab.com\/wp-faculty-2\/?page_id=11"},"modified":"2023-10-12T17:19:32","modified_gmt":"2023-10-12T17:19:32","slug":"research","status":"publish","type":"page","link":"https:\/\/rotavera.uga.edu\/index.php\/research\/","title":{"rendered":"Research"},"content":{"rendered":"<p>[vc_row css=&#8221;.vc_custom_1485738071483{background-image: url(https:\/\/rotavera.uga.edu\/wp-content\/uploads\/2015\/05\/Chapel-4.jpg?id=784) !important;}&#8221;][vc_column]<h1 class=\"fac-big-title fac-title reg_bg text-left\" id=\"\" style=\"color:#ffffff\">Research<\/h1>\n[\/vc_column][\/vc_row][vc_row bg_color=&#8221;#fcfcfc&#8221;][vc_column]<h2 class=\"fac-title reg_bg text-center\" id=\"\" style=\"color:#4b4b4b\">Research Focus<\/h2>\n[vc_row_inner][vc_column_inner width=&#8221;2\/3&#8243;]<div class=\"lab-carousels-wrapper lab-1567600855\"><div class=\"labp-heads-wrap \">\n\t\t\t<div class=\"dummy-lab-item \">\n\t\t\t\t<div class=\"lab-item-image\"><img src=https:\/\/rotavera.uga.edu\/wp-content\/uploads\/2015\/05\/Spectroscopy-1.jpg alt=\"Spectroscopy\" class=\"img-circle lab-img\"><\/div>\n\t\t\t\t<div class=\"lab-item-info\"><h3>Spectroscopy<\/h3><h4><\/h4>\n\t\t\t<\/div><\/div>\n\t\t\t<div class=\"dummy-lab-item \">\n\t\t\t\t<div class=\"lab-item-image\"><img src=https:\/\/rotavera.uga.edu\/wp-content\/uploads\/2015\/05\/THP-TS-Black-1006x1024.png alt=\"Reaction Mechanisms\" class=\"img-circle lab-img\"><\/div>\n\t\t\t\t<div class=\"lab-item-info\"><h3>Reaction Mechanisms<\/h3><h4><\/h4>\n\t\t\t<\/div><\/div>\n\t\t\t<div class=\"dummy-lab-item \">\n\t\t\t\t<div class=\"lab-item-image\"><img src=https:\/\/rotavera.uga.edu\/wp-content\/uploads\/2015\/05\/Flame-2-1024x677.jpg alt=\"Autoignition Chemistry\" class=\"img-circle lab-img\"><\/div>\n\t\t\t\t<div class=\"lab-item-info\"><h3>Autoignition Chemistry<\/h3><h4><\/h4>\n\t\t\t<\/div><\/div>\n\t\t\t<div class=\"dummy-lab-item \">\n\t\t\t\t<div class=\"lab-item-image\"><img src=https:\/\/rotavera.uga.edu\/wp-content\/uploads\/2015\/05\/Clouds-1024x576.jpg alt=\"Pollutant Formation\" class=\"img-circle lab-img\"><\/div>\n\t\t\t\t<div class=\"lab-item-info\"><h3>Pollutant Formation<\/h3><h4><\/h4>\n\t\t\t<\/div><\/div><div class=\"lab-carousel\"><\/div> <div><a href=\"#\" class=\"prev\"><i class=\"fa fa-chevron-circle-left\"><\/i><\/a><a href=\"#\" class=\"next\"><i class=\"fa fa-chevron-circle-right\"><\/i><\/a><\/div><\/div><div class=\"lab-details\"><\/div><\/div>[\/vc_column_inner][vc_column_inner width=&#8221;1\/3&#8243;][vc_column_text css=&#8221;.vc_custom_1615163589841{margin-top: -5px !important;}&#8221;]<\/p>\n<h3>Fundamental Science for Transportation Energy<\/h3>\n<p style=\"text-align: left;\">Uncovering complex <a href=\"https:\/\/www.youtube.com\/watch?v=uCLHoE87PZ4\" target=\"_blank\" rel=\"noopener\"><em><strong>reaction mechanisms<\/strong><\/em><\/a> in combustion enables\u00a0an understanding of the chemistry\u00a0controlling <em><strong>autoignition<\/strong><\/em> and an understanding\u00a0of the pathways involved in the formation of partially oxidized intermediates, including\u00a0<em><strong>pollutants <\/strong><\/em>such as volatile organic compounds (VOC) &#8211; aldehydes, acids, etc. &#8211; emitted into the atmosphere. <em><strong>Spectroscopy<\/strong><\/em>, the interaction of electromagnetic radiation,\u00a0i.e. light, with\u00a0atoms and molecules\u00a0is an experimental tool that aids in discovery of species involved in such reaction mechanisms.<\/p>\n<p>[\/vc_column_text][\/vc_column_inner][\/vc_row_inner][\/vc_column][\/vc_row][vc_row bg_color=&#8221;#fcfcfc&#8221;][vc_column]<h2 class=\"fac-title reg_bg text-center\" id=\"\" style=\"color:#4b4b4b\">Sponsors<\/h2>\n[vc_row_inner equal_height=&#8221;yes&#8221;][vc_column_inner width=&#8221;1\/3&#8243;][vc_single_image image=&#8221;455&#8243; img_size=&#8221;125X125&#8243; alignment=&#8221;center&#8221;][\/vc_column_inner][vc_column_inner width=&#8221;1\/3&#8243;][vc_single_image image=&#8221;1695&#8243; img_size=&#8221;130 x 130&#8243; alignment=&#8221;center&#8221;][\/vc_column_inner][vc_column_inner width=&#8221;1\/3&#8243;][vc_single_image image=&#8221;1919&#8243; img_size=&#8221;125X125&#8243; alignment=&#8221;center&#8221;][\/vc_column_inner][\/vc_row_inner][vc_row_inner][vc_column_inner width=&#8221;1\/3&#8243;][vc_single_image image=&#8221;1692&#8243; img_size=&#8221;2287 \u00d7 797&#8243; alignment=&#8221;center&#8221;][\/vc_column_inner][vc_column_inner width=&#8221;1\/3&#8243;][vc_single_image image=&#8221;1689&#8243; img_size=&#8221;125 \u00d7 125&#8243; alignment=&#8221;center&#8221;][\/vc_column_inner][vc_column_inner width=&#8221;1\/3&#8243;][vc_single_image image=&#8221;2403&#8243; img_size=&#8221;125 \u00d7 125&#8243; alignment=&#8221;center&#8221;][\/vc_column_inner][\/vc_row_inner][\/vc_column][\/vc_row][vc_row][vc_column][vc_row_inner][vc_column_inner width=&#8221;2\/3&#8243;][vc_column_text]<\/p>\n<h2>Sustainable Transportation Energy<\/h2>\n<p>Transportation is an essential component of both modern and developing societies, and at current consumption levels worldwide accounts for the majority of petroleum (&gt; 70%), which is a carbon-intensive non-renewable resource. Because the production technologies of sustainable transportation fuels are advancing, automotive and aviation\u00a0biofuels of the future, which in the majority of cases\u00a0differ in molecular structure compared to\u00a0conventional hydrocarbon fuels,\u00a0are expected to become increasingly integrated into mainstream fuel supplies. While conventional, petroleum-derived liquid fuels such as gasoline and diesel\u00a0are to\u00a0remain dominant for the coming decades, there is a recognized need mandated by the <a href=\"https:\/\/www.epa.gov\/laws-regulations\/summary-energy-independence-and-security-act\" target=\"_blank\" rel=\"noopener\">Energy Independence and Security Act<\/a>\u00a0to develop advanced biofuels that are of comparatively lower carbon intensity and that can be produced using renewable resources in order to arrive at a long-term scenario of sustainable transportation energy.<\/p>\n<p>An important key to advanced biofuels claiming a major role in issues related to sustainability and the environment is production from renewable, low-value, non-consumable feedstock such as cellulose, hemicellulose, and lignin, which are the primary components of plant cell walls, i.e. second- and third-generation biofuel. Such biofuels play an instrumental role in a practical\u00a0sustainable energy future because of the ability to be produced from waste materials or dedicated energy crops that are grown on land deemed infertile for agricultural production.<\/p>\n<h2>Reliance\u00a0on Liquid Fuels<\/h2>\n<p>The high energy density of liquid\u00a0hydrocarbons (ca. 35 MJ\/L), in addition to practical matters such as ease of\u00a0storage and transportability, maintain gasoline, diesel, and aviation fuel as the primary energy carriers for transportation for the\u00a0next several decades, as indicated by the <a href=\"https:\/\/www.eia.gov\/outlooks\/aeo\/\" target=\"_blank\" rel=\"noopener\">U.S. Energy Information Agency (EIA)<\/a>.\u00a0Noting\u00a0that\u00a0liquid fuels for transportation are blends that\u00a0contain numerous distinct chemical species, and that the molecular composition varies depending on the application, the unique reaction mechanisms\u00a0of the individual constituents directly impacts the overall combustion chemistry.\u00a0Ongoing design of next-generation internal combustion\u00a0engine strategies commonly centers on low-temperature, high-pressure operating conditions, where complex radical-isomerization reactions play a central role, in order to simultaneously\u00a0reduce nitrogen oxide emissions (NOx) and increase fuel efficiency.<\/p>\n<p>Combustion reactions of transportation-relevant fuels at low temperatures, below 1000 K, proceed via a degenerate chain-branching mechanism wherein the formation of partially oxidized intermediates, e.g. cyclic ethers, plays an integral role. The initiation step, via reaction of the initial fuel with hydroxyl (OH), hydroperoxyl (HO<sub>2<\/sub>), and other radicals, creates an organic radical, R, which upon reaction with O<sub>2<\/sub> (termed first O<sub>2<\/sub>-addition) forms an organic peroxy radical, ROO, that can isomerize into a carbon-centered hydroperoxy-substituted radical, QOOH. The subsequent reactions of QOOH radicals proceed via unimolecular decomposition or via second O<sub>2<\/sub>-addition and largely dictate the reactivity characteristics of hydrocarbons and biofuels. Understanding the differences in these characteristics of fuels, i.e. reaction mechanisms, is a major focus in the development of computational combustion models that are employed in the design of clean-combustion technologies.<\/p>\n<h2>Molecular Structure of Hydrocarbons and Biofuels<\/h2>\n<p>Conventional hydrocarbon transportation fuels are categorized into several general classes\u00a0\u2212 alkanes, alkenes, and aromatics \u2212\u00a0where alkanes include linear species (e.g. <em>n<\/em>-pentane), branched species (<em>iso<\/em>-octane), and cyclic species (e.g. cyclopentane). Due to the molecular composition of cellulose, hemicellulose, and lignin, lignocellulosic-derived biofuels contain various\u00a0forms of oxygenated functional groups, which can influence fundamental reaction mechanisms in combustion &#8211; particularly low-temperature reaction mechanisms involving organic peroxy radicals (ROO).<\/p>\n<p>Oxygenated functional groups such as carbonyl (e.g. 2-pentanone) or hydroxyl\u00a0moieties (e.g. 1-pentanol)\u00a0create molecular structure differences compared to conventional hydrocarbons (e.g. <em>n<\/em>-pentane). Understanding\u00a0the differences in reaction mechanisms\u00a0attributable to\u00a0functional groups in\u00a0biofuels, relative to hydrocarbon analogues, is a primary objective for developmental efforts on next-generation\u00a0combustion strategies\u00a0and for\u00a0integrating alternative biofuels into mainstream fuel 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width=&#8221;1\/3&#8243;]<h3 class=\"fac-title reg_bg text-center\" id=\"\" style=\"color:#4b4b4b\">Interests<\/h3>\n<ul class=\"ul-boxed list-unstyled\"><li class=\"\"><span>Combustion<\/span><\/li><li class=\"\"><span>Spectroscopy<\/span><\/li><li class=\"\"><span>Biofuels<\/span><\/li><li class=\"\"><span>Reaction Mechanisms<\/span><\/li><li class=\"\"><span>Atmospheric Chemistry<\/span><\/li><li class=\"\"><span>Physical Chemistry<\/span><\/li><li class=\"\"><span>Chemical Kinetics<\/span><\/li><li class=\"\"><span>Sustainable Energy<\/span><\/li><li class=\"\"><span>Thermodynamics<\/span><\/li><li class=\"less_width\"><span>Gas Chromatography \/ Mass Spectrometry<\/span><\/li><\/ul>[\/vc_column_inner][\/vc_row_inner][\/vc_column][\/vc_row]<\/p>\n","protected":false},"excerpt":{"rendered":"<p>[vc_row css=&#8221;.vc_custom_1485738071483{background-image: url(https:\/\/rotavera.uga.edu\/wp-content\/uploads\/2015\/05\/Chapel-4.jpg?id=784) !important;}&#8221;][vc_column][\/vc_column][\/vc_row][vc_row bg_color=&#8221;#fcfcfc&#8221;][vc_column][vc_row_inner][vc_column_inner width=&#8221;2\/3&#8243;][\/vc_column_inner][vc_column_inner width=&#8221;1\/3&#8243;][vc_column_text css=&#8221;.vc_custom_1615163589841{margin-top: -5px !important;}&#8221;] Fundamental Science for Transportation Energy Uncovering complex reaction mechanisms in [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"page-pagebuilder.php","meta":{"footnotes":""},"class_list":["post-134","page","type-page","status-publish","hentry"],"jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/rotavera.uga.edu\/index.php\/wp-json\/wp\/v2\/pages\/134","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/rotavera.uga.edu\/index.php\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/rotavera.uga.edu\/index.php\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/rotavera.uga.edu\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/rotavera.uga.edu\/index.php\/wp-json\/wp\/v2\/comments?post=134"}],"version-history":[{"count":135,"href":"https:\/\/rotavera.uga.edu\/index.php\/wp-json\/wp\/v2\/pages\/134\/revisions"}],"predecessor-version":[{"id":2408,"href":"https:\/\/rotavera.uga.edu\/index.php\/wp-json\/wp\/v2\/pages\/134\/revisions\/2408"}],"wp:attachment":[{"href":"https:\/\/rotavera.uga.edu\/index.php\/wp-json\/wp\/v2\/media?parent=134"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}