Assistant Research Professor Ioulia Valla has been awarded a $190,000 grant from the Energy for Sustainability Division of the National Science Foundation. The grant is in support of her project entitled Turning Tars into Energy: Zeolites with Hierarchical Pore Structure for Catalytic Cracking of Tars. The goal of this research is to convert waste tars compounds into valuable gases using a one-step catalytic process, testing the hypothesis that zeolite-based materials with hierarchical pore network architecture will eliminate the diffusion limitations of the heavy multi-ring aromatic compounds hydrocarbons present in tars and will accommodate their cracking.
Tars are Poly-Aromatic Hydrocarbons (PAH) present in the synthesis gas, which impose detrimental effects in downstream gasification processes. They are carcinogenic in nature and significantly reduce the overall process efficiency. Thus, they need to be either removed or converted. Zeolites are catalytic materials widely used in industry for the cracking of heavy hydrocarbons, but their microporous system imposes significant diffusion limitations. The research of Dr. Valla’s group is focused on the modification of the zeolite pore structure and the development of a hierarchical pore network and metal active sites that will enhance the cracking and the reforming of the PAH to synthesis gas.
Dr. Valla says, “our hypothesis lies on the idea that utilizing the advantages of zeolites with hierarchical porosity and transition metals would be ideal and would create great potential for transforming the unwanted tars to valuable energy. We hope to achieve a breakthrough that will have a significant impact on today’s energy crisis and will ‘unlock’ the future of biomass as a renewable fuel.” Assistant Professor of Chemical Engineering George Bollas is co-PI on this project.
Professor Anson Ma of the Chemical Engineering Program has received the CAREER award (#1253613) from the National Science Foundation (NSF). The Faculty Early Career Development (CAREER) Program is NSF’s most prestigious award for junior faculty, reserved for those who embody the role of “teacher-scholars” by seamlessly integrating outstanding research and excellent education. Ma’s award is given by the Fluid Dynamics Program of the Chemical, Bioengineering, Environmental, and Transport Systems (CBET) Division. The award provides $400,000 in research funding support over a period of 5 years.
The title of Dr. Ma’s winning proposal is “Understanding the interfacial rheology of carbon nanotubes at the fluid-fluid interfaces for creating ultra-stable emulsions and microcapsules”. Particles of appropriate size and wetability are known to stabilize emulsions, but the effect of particle shape remains largely unexplored. Dr. Ma and team propose that the shape matters and that particle shape could be the missing key to unlock the full potential of using particles to stabilize emulsions. To this end, Dr. Ma and his team will investigate the flow behavior of CNTs at fluid-fluid interfaces using carbon nanotubes as a model system. The success of the proposed research will offer a general and yet relatively simple strategy (i.e., by exploiting particle shape) to improve the stability of emulsions, prolonging the shelf life of widely used pharmaceutical, agricultural, and personal care products. The findings may also revolutionize the use of nanoparticles for enhanced oil recovery, essential to ensuring national energy independence and addressing the world’s energy challenge.
Further, Dr. Ma has a long-term vision that the asymmetry of the interface may offer an effective way to assemble nanoparticles into ordered structures and to create next-generation metamaterials. Metamaterials are hierarchically ordered structures that can be used in cloaking devices and light-based circuits that may ultimately outperform electron-based computers in terms of speed, power consumption, and costs. The proposed research will be integrated with educational and outreach activities at all levels to maximize its impact. Dr. Ma and his team will use culinary foams and emulsions (e.g., cappuccino foam, ice cream mix) as the theme to introduce basic scientific concepts to the younger generation and the local community.
Dr. Ma, who earned his Ph.D. from the University of Cambridge in the UK, joined UConn in August 2011 following a two-year appointment as the J. Evans Attwell-Welch Postdoctoral Fellow at Rice University. He has a dual appointment in the Polymer Program at the Institute of Materials Science (IMS). He recently received the Distinguished Young Rheologist Award from TA Instruments, which recognizes young faculty members who show exceptional promise in the field of rheology. Prior to that, he received the National Science Foundation Early Concept Grant for Exploration Research (EAGER) award, which focuses on investigating the use of nanoparticles in the delivery of cancer drugs.
In a recent Science journal article entitled “Strong, Light, Multifunctional Fibers of Carbon Nanotubes with Ultrahigh Conductivity,” Professor Anson Ma and colleagues from Rice University detail their recent breakthrough revolutionizing the use of carbon nanotubes. Carbon nanotubes (CNTs) are rolled cylinders of graphene sheets that have unprecedented mechanical, electrical, and thermal properties. In the past, many of the potential real-world applications of CNTs remained unfulfilled because researchers experienced great difficulties dispersing and processing CNTs into macroscopic objects while maintaining their fascinating properties. To address this problem, Dr. Ma and colleagues from Rice developed a scalable fluid-based process for spinning CNTs into lightweight and multifunctional fibers. These fibers combine the mechanical strength of carbon fibers with the specific electrical conductivity of metals, opening up the exciting possibility of using CNTs in aerospace, field-emission, and power-transmission applications. The article can be accessed at: http://www.sciencemag.org/content/339/6116/182
Dr. Ma, who earned his Ph.D. from the University of Cambridge in the UK, joined UConn in August 2011 as an Assistant Professor of Chemical Engineering with a dual appointment in the Institute of Materials Science Polymer Program. He recently received the Distinguished Young Rheologist Award from TA Instruments, which recognizes young faculty members who show exceptional promise in the field of rheology. Prior to that, he received the National Science Foundation Early Concept Grant for Exploration Research (EAGER) award, which focuses on investigating the use of nanoparticles in the delivery of cancer drugs.