recovery mode

A fire that burned for 4 days after Texas pipeline explosion has finally gone out

Before the fire went out, its reduced size meant police finally had access to the area around the pipeline. Photo via Getty Images

A pipeline fire that burned in a Houston suburb for four days finally went out Thursday as authorities announced a criminal investigation into the blaze that had roared into a towering flame, forcing neighborhoods to evacuate and melting parts of nearby cars.

Before the fire fully stopped Thursday evening, officials announced that human remains were found in an SUV that had been next to the flame since the explosion happened Monday. Investigators say the fire began after the driver of that car went through a fence alongside a Walmart parking lot and struck an above-ground valve.

Officials in Deer Park, where the explosion occurred, described the crash as an accident, and said police and local FBI agents have not found evidence of a coordinated or terrorist attack.

“This has developed into a criminal investigation and will be actively ongoing until more information is available,” the city said in a statement late Thursday.

As authorities worked to identify who had driven the vehicle, residents who were forced to flee the towering blaze returned to assess the damage on Thursday. They found mailboxes and vehicles partially melted by the intense heat, a neighborhood park charred and destroyed and fences burned to the ground.

“Devastated, upset, scared. We don’t know what we’re going to do now,” said Diane Hutto, 51, after finding her home severely damaged by water that firefighters poured on it to keep it from catching fire. Hutto’s home is located only a few hundred feet from the pipeline.

Before the fire went out, its reduced size meant police finally had access to the area around the pipeline. Investigators removed the white SUV and towed it away Thursday morning.

While medical examiners with Harris County were processing the vehicle, they recovered and removed human remains found inside, Deer Park officials said in a statement.

Officials say the underground pipeline, which runs under high-voltage power lines in a grassy corridor between the Walmart and a residential neighborhood, was damaged when the SUV driver left the store’s parking lot, entered the wide grassy area and went through a fence surrounding the valve equipment.

But authorities have offered few details on what caused the vehicle to crash through the fence and hit the pipeline valve.

Energy Transfer, the Dallas-based company that owns the pipeline, on Wednesday called it an accident. Deer Park officials said preliminary investigations by police and FBI agents found no evidence of a terrorist attack.

The pipeline is a 20-inch-wide (50-centimeter-wide) conduit that runs for miles through the Houston area. It carries natural gas liquids through Deer Park and La Porte, both of which are southeast of Houston.

Authorities evacuated nearly 1,000 homes at one point and ordered people in nearby schools to shelter in place. Officials began letting residents return to their homes on Wednesday evening.

Hutto said Thursday the fire incinerated her home’s backyard fence and partially melted a small shed where her husband stored his lawnmower. Inside the home, mold and mildew were starting to set in from the water damage, and part of the ceiling in her daughter's bedroom had collapsed.

“Everything is just soaking wet,” she said. “It smells bad. I don’t think there’s really anything we can salvage at this point.”

Across the street, Robert Blair found minor damage when he returned to his home Thursday morning. It included broken and cracked windows and a window screen and irrigation system pipes that had been melted by the heat.

“We were very lucky here. It could have been worse,” said Blair, 67.

The pipeline’s valve equipment appears to have been protected by a chain-link fence topped with barbed wire. Energy Transfer has not responded to questions about any other safety protections that were in place.

Harris County Judge Lina Hidalgo, the county’s top elected official, said Thursday that officials will look at whether they can require companies like Energy Transfer to install better security measures, including concrete structures around pipelines and their aboveground valves.

“If they had that around it, I don’t think this would have happened,” Blair said.

Energy Transfer and Harris County officials have said that air quality monitoring showed no immediate risk to individuals, despite the huge tower of billowing flame that shot hundreds of feet into the air when the fire first began, creating thick black smoke that hovered over the area.

Houston, Texas’ largest city, is the nation’s petrochemical heartland and is home to a cluster of refineries and plants and thousands of miles of pipelines. Explosions and fires are a familiar sight in the area, including some that have been deadly, raising recurring questions about the adequacy of industry efforts to protect the public and the environment.

Hidalgo said some residents she spoke with told her they don’t feel safe living in the area after this week’s fire.

Hutto, whose husband works in a petrochemical plant, said living near such facilities has always been a concern, but this week’s fire has changed things for her.

“I don’t think I want to live here anymore. I’m just too scared to stay here,” Hutto said.

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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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