built for the future

Photos: City of Houston makes $4.4M facilities upgrades with sustainability, resiliency in mind

Houston Mayor Sylvester Turner celebrated the opening of the renovated City Hall basement that was damaged in Hurricane Harvey. Photo via houstontx.gov

Where some might see just a basement, Mayor Sylvester Turner sees an opportunity to tell a story of Houston's resiliency and dedication to sustainability.

When Hurricane Harvey hit Houston, it left 18 to 20 inches of floodwaters in the basement of Houston City Hall. The city received funding from FEMA to support the $4.4 million renovation project that commenced in 2020. After facing challenges — including a defaulted contractor — the city revealed the new space this week, which was completed by contractor Dunhill Construction.

The basement includes 18 works of art that each are an "ode to Houston." Photo via houstontx.gov

"The City Hall Basement renovation is a testament to the resilient spirit of Houston," says Turner in the news release. "We encountered some challenges, but we've revitalized this space while preserving our history and embracing innovation. This space truly embodies our commitment to a sustainable future."

The new basement holds conference rooms, training facilities, and a wellness center that was donated by Cigna. The project was focused on implementing sustainability and efficiency and included replacing aging air handling units with more efficient technology, LED lighting equipped with sensors to avoid energy waste, and a sliding floodgate to prevent history from repeating itself should another storm hit Houston.

The new space includes training facilities.Photo via houstontx.gov

The project also incorporated 18 pieces of Houston-focused art by artists including Mark Chen, Syd Moen, Nancy Newberry, and David Reinfeld. The 49 Houston mayor portraits, which were rescued by a staffer during the storm, were conserved, reframed, and rehung.

The space will also be the home to Houston's first walk-in 311 center, per the release, and the 311’s Continuity of Operations Plan, or COOP, and will be a secondary location in case the main call center fails.

With the completion of the project, the city has a few more upgrades — including additional training facilities, the mayor's dining room, and kitchen — coming soon and set to be completed in November.

Cigna donated a wellness center as a part of the renovation. Photo via houstontx.gov

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A View From HETI

A team from UH has published two breakthrough studies that could help cut costs and boost efficiency in carbon capture. Photo courtesy UH.

A team of researchers at the University of Houston has made two breakthroughs in addressing climate change and potentially reducing the cost of capturing harmful emissions from power plants.

Led by Professor Mim Rahimi at UH’s Cullen College of Engineering, the team released two significant publications that made significant strides relating to carbon capture processes. The first, published in Nature Communications, introduced a membraneless electrochemical process that cuts energy requirements and costs for amine-based carbon dioxide capture during the acid gas sweetening process. Another, featured on the cover of ES&T Engineering, demonstrated a vanadium redox flow system capable of both capturing carbon and storing renewable energy.

“These publications reflect our group’s commitment to fundamental electrochemical innovation and real-world applicability,” Rahimi said in a news release. “From membraneless systems to scalable flow systems, we’re charting pathways to decarbonize hard-to-abate sectors and support the transition to a low-carbon economy.”

According to the researchers, the “A Membraneless Electrochemically Mediated Amine Regeneration for Carbon Capture” research paper marked the beginning of the team’s first focus. The research examined the replacement of costly ion-exchange membranes with gas diffusion electrodes. They found that the membranes were the most expensive part of the system, and they were also a major cause of performance issues and high maintenance costs.

The researchers achieved more than 90 percent CO2 removal (nearly 50 percent more than traditional approaches) by engineering the gas diffusion electrodes. According to PhD student and co-author of the paper Ahmad Hassan, the capture costs approximately $70 per metric ton of CO2, which is competitive with other innovative scrubbing techniques.

“By removing the membrane and the associated hardware, we’ve streamlined the EMAR workflow and dramatically cut energy use,” Hassan said in the news release. “This opens the door to retrofitting existing industrial exhaust systems with a compact, low-cost carbon capture module.”

The second breakthrough, published by PhD student Mohsen Afshari, displayed a reversible flow battery architecture that absorbs CO2 during charging and releases it upon discharge. The results suggested that the technology could potentially provide carbon removal and grid balancing when used with intermittent renewables, such as solar or wind power.

“Integrating carbon capture directly into a redox flow battery lets us tackle two challenges in one device,” Afshari said in the release. “Our front-cover feature highlights its potential to smooth out renewable generation while sequestering CO2.”

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