energy transition materials

DOE grants Houston-area energy tech co. over $5M for rare earth elements study

A company headquartered in The Woodlands has secured funding to study the recovery of rare earth elements as they pertain to the energy transition. Photo via tetratec.com

The Woodlands-based Tetra Technologies, an energy technology and services company, has picked up nearly $5.4 million in U.S. Department of Energy funding to study the recovery of rare earth elements and other critical minerals from coal byproducts in Pennsylvania.

The funding also will enable Tetra to explore converting coal byproducts, known as underclay, into clays that could be sold. In addition to the DOE funding, the company also secured about $1.3 million for a total of $6.7 million.

Publicly traded Tetra got the funding as part of a more than $17 million package aimed at designing and building facilities to produce rare earth elements, along with other critical minerals and materials, from coal resources. The Department of Energy (DOE) says these minerals and materials will go toward generating clean energy.

Rare earth elements can be derived from the country’s more than 250 billion tons of coal reserves, over 4 billion tons of waste coal, and about 2 billion tons of coal ash, according to DOE.

Clean energy fixtures like solar plants, wind farms, and electric vehicles generally require more minerals to build than their fossil-fuel-based counterparts, according to the International Energy Agency. For example, a typical electric car requires six times the mineral resources of a conventional car and an onshore wind plant requires nine times more mineral resources than a gas-fired plant.

The American Geosciences Institute says rare earth elements, a set of 17 metallic elements, also are an essential component of many tech-dependent products. These include cell phones, flat-screen TVs, and radar and sonar systems.

China is the top country for production of rare earth elements, with the U.S. far behind at No. 2.

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A View From HETI

Solar represented 14 percent of energy supplied to the ERCOT electric grid in 2025. Photo via bp.com

Solar barely eclipsed coal to become the third biggest source of energy generated for the Electric Reliability Council of Texas (ERCOT) in 2025, according to new data.

In 2024, solar represented 10 percent of energy supplied to the ERCOT electric grid. Last year, that number climbed to 14 percent. During the same period, coal’s share remained at 13 percent.

From the largest to smallest share, here’s the breakdown of other ERCOT energy sources in 2025 compared with 2024:

  • Combined-cycle gas: 33 percent, down from 35 percent in 2024
  • Wind: 23 percent, down from 24 percent in 2024
  • Natural gas: 8 percent, down from 9 percent in 2024
  • Nuclear: 8 percent, unchanged from 2024
  • Other sources: 1 percent, unchanged from 2024

Combined, solar and wind accounted for 37 percent of ERCOT energy sources.

Looking ahead, solar promises to reign as the star of the ERCOT show:

  • An ERCOT report released in December 2024 said solar is on track to continue outpacing other energy sources in terms of growth of installed generating capacity, followed by battery energy storage.
  • In December, ERCOT reported that more than 11,100 megawatts of new generating capacity had been added to its grid since the previous winter. One megawatt of electricity serves about 250 homes in peak-demand periods. Battery energy storage made up 47 percent of the new capacity, with solar in second place at 40 percent.

The mix of ERCOT’s energy is critical to Texas’ growing need for electricity, as ERCOT manages about 90 percent of the electric load for the state, including the Houston metro area. Data centers, AI and population growth are driving heightened demand for electricity.

In the first nine months of 2025, Texas added a nation-leading 7.4 gigawatts of solar capacity, according to a report from data and analytics firm Wood Mackenzie and the Solar Energy Industries Association.

“Remarkable growth in Texas, Indiana, Utah and other states ... shows just how decisively the market is moving toward solar,” says Abigail Ross Hopper, president and CEO of the solar association.

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