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5. Liquid Fed Pyrolysis of Polyethylene Films: Environmental and Economic Assessments of Co-located and Remotely-Located U.S. Facilities

Author

Chaudhari, Utkarsh S., primary, Kulas, Daniel G., additional, Umlor, Libby, additional, Cronan, Alayna, additional, Peralta, Alejandra, additional, Hossain, Tasmin, additional, Handler, Robert M., additional, Johnson, Anne T., additional, Reck, Barbara K., additional, Thompson, Vicki S., additional, Hartley, Damon S., additional, Watkins, David W., additional, and Shonnard, David R., additional

Published
2024
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8. Metagenomic Sequencing of Two Cultures Grown on Chemically Deconstructed Plastic Products

Author

Putman, Lindsay I., primary, Schaerer, Laura G., additional, Wu, Ruochen, additional, Kulas, Daniel G., additional, Zolghadr, Ali, additional, Ong, Rebecca G., additional, Shonnard, David R., additional, Techtmann, Stephen M., additional, Arbanas, Lucille G., additional, Bannerman, Gabriel G., additional, Cart, Brice, additional, Cureton, Allen, additional, Doerr, Benjamin P., additional, Jovicevic, Zora, additional, Langosch, Mary, additional, MacLeod, Aaron B., additional, McCloskey, Caden, additional, McNally, Avery M., additional, Monkevich, Mykenzie K., additional, Noecker, Adrian, additional, Norris, Dylan, additional, Pellizzon, Vincent G., additional, Strom, Kylie B., additional, and Taylor, Emily E., additional

Published
2023
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10. Solvent based dissolution–precipitation of waste polyethylene terephthalate: economic and environmental performance metrics

Author

Chaudhari, Utkarsh S., primary, Kulas, Daniel G., additional, Peralta, Alejandra, additional, Hossain, Tasmin, additional, Johnson, Anne T., additional, Hartley, Damon S., additional, Handler, Robert M., additional, Reck, Barbara K., additional, Thompson, Vicki S., additional, Watkins, David W., additional, and Shonnard, David R., additional

Published
2023
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11. Chemical Recycling of Waste Polyethylene Terephthalate Via Solvent Based Dissolution-Precipitation Technologies: Economic and Environmental Performance Metrics

Author

Chaudhari, Utkarsh Shailesh, primary, Kulas, Daniel, additional, Peralta, Alejandra, additional, Hossain, Tasmin, additional, Johnson, Anne, additional, Hartley, Damon, additional, Handler, Robert, additional, Reck, Barbara, additional, Thompson, Vicki, additional, Watkins, David, additional, and Shonnard, David, additional

Published
2023
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14. Comparative Analysis of Injection of Pyrolysis Oil from Plastics and Gasoline into the Engine Cylinder and Atomization by a Direct High-Pressure Injector.

Author

Szwaja, Magdalena, Naber, Jeffrey D., Shonnard, David, Kulas, Daniel, Zolghadr, Ali, and Szwaja, Stanislaw

Subjects
ENGINE cylinders, SPARK ignition engines, GASOLINE, PETROLEUM, PYROLYSIS, HIGH density polyethylene
Abstract

The article discusses the results of experimental studies on the course of pyrolysis oil injection through the high-pressure injector of a direct-injection engine. The pyrolysis oil used for the tests was derived from waste plastics (mainly high-density polyethylene—HDPE). This oil was then distilled. The article also describes the production technology of this pyrolysis oil on a laboratory scale. It presents the results of the chemical composition of the raw pyrolysis oil and the oil after the distillation process using GC-MS analysis. Fuel injection tests were carried out for the distilled pyrolysis oil and a 91 RON gasoline in order to perform a comparative analysis with the tested pyrolysis oil. In this case, the research was focused on the injected spray cloud analysis. The essential tested parameter was the Sauter Mean Diameter (SMD) of fuel droplets measured at the injection pressure of 400 bar. The analysis showed that the oil after distillation contained a significant proportion of light hydrocarbons similar to gasoline, and that the SMDs for distilled pyrolysis oil and gasoline were similar in the 7–9 µm range. In conclusion, it can be considered that distilled pyrolysis oil from HDPE can be used both as an additive for blending with gasoline in a spark-ignition engine or as a single fuel for a gasoline compression-ignition direct injection engine. [ABSTRACT FROM AUTHOR]

Published
2023
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25. A survey of techniques to add audio module to embedded systems.

Author

Xiaohe Wu, Obeng, Morrison, Jing Wang, and Kulas, Daniel

Abstract

In many embedded application systems, it is desirable to incorporate an audio module/functionality to the system such that the system can utter meaningful audio messages in a controlled manner. An audio system in the embedded setting may consist of memory module, Compression/Decompression (CODEC) module, Digital-to-Analog Converter (DAC) module, filter module, power amplifier module; and also (if the function of voice recording is needed) the signal conditioning module, Automatic Gain Control (AGC), and Analog-to-Digital Conversion (ADC) module. Depending on the different demands of various application scenarios, different techniques can be used to implement the audio module. If no audio signal processing is required, the approach of using a dedicated, off-the-shelf, voice chip is preferable. In other cases, individual circuits would have to be built for some or all of the peripheral modules required in an audio system. The major advantage of this approach is increased level of flexibility; while the immediate disadvantage is rising development cost and a higher level of system complexity. In this paper, we first outline the general operation principle of a typical audio system module; then, a sample implementation that uses a dedicated voice chip is introduced and explained in great detail so that it can be used by students and application engineers as a functional reference design. [ABSTRACT FROM PUBLISHER]

Published
2012
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