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Search Publications by: Ashley Hartwell (Fed)

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Displaying 1 - 5 of 5

Reference Model for Electric Vehicle Battery Recovery in a Circular Economy

September 30, 2025
Author(s)
Matthew Triebe, Nehika Mathur, Ashley Hartwell, Katherine Morris
Electric vehicle batteries, which use a significant amount of critical materials, have the potential to be a reliable secondary source of those high-value materials at the end of their life to meet future needs. In this paper we present a reference model

Quantifying High Density Polyethylene Flows in the United States using Material Flow Analysis

August 20, 2024
Author(s)
Abheek Chatterjee, Nehika Mathur, Daniel Figola, Matthew Triebe, Buddhika Hapuwatte, Ashley Hartwell, Katherine Morris
A Circular Economy (CE) aims to reduce natural resource consumption, waste generation, and related detrimental environmental, social, and economic impacts by retaining valuable materials in the economy as long as possible. This research focuses on the

Recovery pathway assessment of recycled HDPE for circular economy: Shorter-life vs longer-life products

May 7, 2024
Author(s)
Buddhika Hapuwatte, Ashley Hartwell, Matthew Triebe, Abheek Chatterjee, Nehika Mathur, Daniel Figola, Katherine Morris
High Density Polyethylene (HDPE) is a highly recyclable thermoplastic comprising 17% of all plastic produced. Yet, demand for recycled HDPE (r-HDPE) has outrun availability, partly due to manufacturers' interest in meeting sustainability goals and recycled
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