seeing green

Houston airports land $12.5M for green projects, announce new EV fleet

Houston's airports are looking more and more green. Photo via fly2houston.org

Houston Airports will receive funding from The Federal Aviation Administration in the next few months on projects aimed at reducing greenhouse gas emissions and implementing the administration's climate challenge guidance at its hubs.

The funds — about $12.5 million — come from the FAA's FY2022 Airport Improvement Program Supplemental Discretionary Grant Competition and are slated to be rolled-out by September 2024. Projects at George Bush Intercontinental and Hobby airports were among 79 projects around the country, which the FAA granted about $268 million to in total.

“Houston Airports is committed to reducing our environmental impact while also protecting the planet as we expand our global reach. These FAA grants fund our ability to invest in smart and sustainable solutions” Jim Szczesniak, COO for Houston Airports, said in a statement. “The end result of these projects will be a more resilient, efficient and sustainable airport system that aligns with the goal of Houston Airports to achieve carbon neutrality by 2030.”

IAH received $10.3 million for two projects that will replace existing generators and fund an energy audit to find energy and water use efficiencies at the airport, as well as "define actionable steps to reduce greenhouse gas emissions across the airfield and the airport's buildings," according to the statement.

Hobby received $2.1 million to also go towards an energy audit and to create a Resiliency Master Plan to help mitigate the impacts of climate change, severe weather and floods in a sustainable way.

Separate from the FAA funds, Houston airports also announced in recent weeks that it will add an all-electric fleet of vehicles for its six airport locations by the end of 2023.

According to a release from HAS, ground operations are a major source of the aviation industry's carbon footprint.

The fleet will include 25 Ford F-150 Lightnings, which can travel up to 320 miles on a full charge. HAS's maintenance team planned to install 11 Level 2 charging stations to support the fleet at its airports this summer.

These updates are all part of HAS's Sustainable Management Plan, which aims to get the system to carbon neutrality by 2030.

Earlier this year, Hertz Electrifies Houston, in partnership with bp pulse, announced that it would install a new EV fast-charging hub to Hobby Airport that's designed to serve ride-hail, taxi fleets and the general public. The initiative, which was formed by The Hertz Corp. and the City of Houston, also aimed to bring 2,100 rental electric vehicles to Houston.

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A View From HETI

Rice's Atin Pramanik and a team in Pulickel Ajayan's lab shared new findings that offer a sustainable alternative to lithium batteries by enhancing sodium and potassium ion storage. Photo by Jeff Fitlow/Courtesy Rice University

A new study by researchers from Rice University’s Department of Materials Science and NanoEngineering, Baylor University and the Indian Institute of Science Education and Research Thiruvananthapuram has introduced a solution that could help develop more affordable and sustainable sodium-ion batteries.

The findings were recently published in the journal Advanced Functional Materials.

The team worked with tiny cone- and disc-shaped carbon materials from oil and gas industry byproducts with a pure graphitic structure. The forms allow for more efficient energy storage with larger sodium and potassium ions, which is a challenge for anodes in battery research. Sodium and potassium are more widely available and cheaper than lithium.

“For years, we’ve known that sodium and potassium are attractive alternatives to lithium,” Pulickel Ajayan, the Benjamin M. and Mary Greenwood Anderson Professor of Engineering at Rice, said in a news release. “But the challenge has always been finding carbon-based anode materials that can store these larger ions efficiently.”

Lithium-ion batteries traditionally rely on graphite as an anode material. However, traditional graphite structures cannot efficiently store sodium or potassium energy, since the atoms are too big and interactions become too complex to slide in and out of graphite’s layers. The cone and disc structures “offer curvature and spacing that welcome sodium and potassium ions without the need for chemical doping (the process of intentionally adding small amounts of specific atoms or molecules to change its properties) or other artificial modifications,” according to the study.

“This is one of the first clear demonstrations of sodium-ion intercalation in pure graphitic materials with such stability,” Atin Pramanik, first author of the study and a postdoctoral associate in Ajayan’s lab, said in the release. “It challenges the belief that pure graphite can’t work with sodium.”

In lab tests, the carbon cones and discs stored about 230 milliamp-hours of charge per gram (mAh/g) by using sodium ions. They still held 151 mAh/g even after 2,000 fast charging cycles. They also worked with potassium-ion batteries.

“We believe this discovery opens up a new design space for battery anodes,” Ajayan added in the release. “Instead of changing the chemistry, we’re changing the shape, and that’s proving to be just as interesting.”

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