ABB plans to collaborate with Houston-based Green Hydrogen International on the Hydrogen City project. Photo via Getty Images
Electrification and automation company ABB, whose U.S. headquarters for its Energy Industries business is in Houston, has tentatively agreed to supply power for a $10 billion hydrogen project in South Texas.
Under a new memorandum of understanding, ABB plans to collaborate with Houston-based Green Hydrogen International on the Hydrogen City project. The first phase of the project is expected to generate 280,000 tons of green hydrogen per year. This green hydrogen will then be converted to one million tons of green ammonia each year.
“Together, we will enable efforts to decarbonize global industry and progress towards a net-zero future,” Brandon Spencer, president of ABB Energy Industries, says in a news release.
The memorandum of understanding calls for ABB’s technology to be assessed for delivery of solar and onshore wind energy to the 2.2-gigawatt electrolyzer facility at Hydrogen City.
The project will store up to 24,000 tons of green hydrogen in underground salt caverns. A 75-mile pipeline to the nearby Corpus Christi energy port will carry the green hydrogen to an ammonia production facility. At this facility, green hydrogen will be turned into green ammonia that’ll be shipped to Europe and Asia.
Green Hydrogen International is in talks with companies interested in using green hydrogen from Hydrogen City as feedstock for sustainable aviation fuel and e-methane.
Hydrogen City will serve a global green ammonia market whose value is projected to reach $17.9 billion by 2030. Construction on Hydrogen City is scheduled to start in 2026, with initial production set for 2030.
Green Hydrogen International unveiled the multiphase Hydrogen City project in 2022, saying it would be “the world’s largest green hydrogen production and storage hub.” At his month’s CERAWeek in Houston, officials provided an update on Hydrogen City.
“Ammonia has the potential to support decarbonization efforts as part of the energy transition through its use as an alternative fuel for heavy transport such as shipping, as well as its current major use in fertilizer production,” ABB says in the news release.
Last October, Green Hydrogen International announced a Hydrogen City partnership with Japanese oil and gas giant Inpex, whose U.S. outpost is in Houston.
Here's what to attend at CERAWeek. Photo via CERAWeek.com
Editor's note: Dive headfirst into the new week with things to catch up on in Houston's energy transition — a special CERAWeek 2024 edition. Check out these must-attend events at the conference, which is going on all week in Downtown Houston.
Monday, March 18, at 4:30 pm — IRA at One and a Half Years: What is the impact?
Billions of dollars have poured into the energy sector to spur investment and production of technology to fight climate change through the passing of the Inflation Reduction Act (IRA) 18 months ago. Experts weigh in on the successes so far and any challenges and obstacles that have arisen.
Roman Kramarchuk, S&P Global Commodity Insights Head – Climate Markets and Policy Analytics
Jigar Shah, United States Department of Energy Director, Loan Programs Office
Kevin Gresham, RWE Senior Vice President, Government Relations & Regulatory Affairs
Steve Smith, National Grid Group Head of Strategy, Innovation and Market Analytics, National Grid | President, National Grid Partners
Tuesday, March 19, at 1 pm — Everything is Bigger in Texas: Building Hydrogen City
Announced in 2022, the largest green hydrogen production, storage and transport hub is being developed in South Texas. It will be powered by behind-the-meter solar and wind and the first phase is expected to produce 1/4 million tonnes of green hydrogen per year. The project developers will provide an update on the early stages of the project.
Toshiaki Takimoto, INPEX Corporation Director, Senior Managing Executive Officer, Corporate Strategy & Planning and Head of Net Zero Business
Kenneth Medlock, Rice University, Baker Institute Senior Director, Center for Energy Studies
Noah Feingold, S&P Global Consulting Associate Director
Brian Maxwell, Green Hydrogen International Founder & Chief Executive Officer
Wednesday, March 20, at 1 pm — Houston Energy Initiative Energy Venture Day and Pitch Competition
Join The Rice Alliance for Technology and Entrepreneurship, the Houston Energy Transition Initiative and the Texas Entrepreneurship Exchange for Energy (TEX-E) for the third annual Energy Venture Day and Pitch Competition at CERAWeek. The pitch day will feature more than 40 energy ventures driving efficiency and advancements toward the energy transition. The fast-paced competition is designed to connect energy startups with venture capitalists, corporate innovation groups, industry leaders, academics and service providers.
Thursday, March 21, at 1 pm — Luncheon & Dialogue with Bill Gates
Legendary Microsoft founder Bill Gates, who founded Breakthrough Energy and TerraPower, is headed to town for the 2024 CERAWeek. Gates will be featured in a luncheon fireside chat with S&P Global's Daniel Yergin.
HETI House
Drop by the Houston Energy Transition Initiative's HETI House at CERAWeek for a tour or one of the fireside chats.
Commercializing low carbon technology: unique partnerships between industry and academia
Woodside Energy + Rice University
Monday, March 18 | 2 p.m.
Tony Almond – VP of Technology & Innovation, Woodside Energy
Aditya Mohite – Associate Professor, Chemical and Biomolecular Engineering; Associate Professor, Materials Science and Nanoengineering, Rice University
In 2024, Woodside Energy and Rice University in Houston announced a five-year technology collaboration aimed at reducing greenhouse gas emissions and providing lower carbon solutions. Woodside will provide $12.5 million to fund the creation of the Woodside-Rice Decarbonization Accelerator, an initiative that aims to bring breakthrough decarbonization technology from the Rice labs to market, with a specific focus on manufacturing products derived from captured carbon dioxide and methane. Specifically, Rice hopes to leverage cold plasma technology, a unique approach to breaking down carbon dioxide. These products have potential applications to make better batteries, transistors, and other critical materials for energy technologies.
Investing in our academic institutions and talent in the energy capital of the world
Shell + University of Houston Energy Transition Institute
Tuesday, March 19 | 9:30 a.m.
Jenny Philip, Energy Transition U.S. Senior Advisor, Shell
Scott Nyquist, Energy Advisory Board, University of Houston. Vice-Chair, Houston Energy Transition Initiative, Greater Houston Partnership
Ramanan Krishnamoorti, Chief Energy Officer, University of Houston
Funded by Shell USA, Inc and Shell Global Solutions, US Inc, the University of Houston’s new Energy Transition Institute (ETI) empowers the next generation of energy leaders; develops and accelerates energy solutions, including hydrogen, carbon management and circular materials at scale; and informs policies to address our most pressing challenge to provide secure, reliable, affordable and sustainable energy for all. Learn more about how University of Houston’s ETI is driving research, innovation and workforce development to support the transition to a low-carbon, energy-abundant future.
How Houston Leads: Engaging Communities and Creating Opportunity in the Energy Transition
Jane Stricker, Houston Energy Transition Initiative + Greater Houston Partnership
Houston has long been regarded as the Energy Capital of the World. As the industry continues to innovate and deploy projects for an energy-abundant, low-carbon future, engaging communities and creating opportunity for all will be critical. In this session, Jane and Brett will discuss the engagement approaches leading energy companies are putting into practice to expand opportunity for all communities. Come learn about best practices, key challenges and new methods for building sustained relationships with communities.
Scaling carbon-neutral gasoline – feed to construction
HIF Global + Bechtel
Thursday, March 21 | 10 a.m.
Brooke Vandygriff, Chief Operations Officer, HIF USA
Rich Wall, Principal Vice President & General Manager Downstream, Chemicals & Advanced Fuels, Bechtel
HIF Global, the world’s leading eFuels company, has selected Bechtel Energy, Siemens Energy, and Topsoe to conduct the front-end engineering and design (“FEED”) of a facility to be constructed in Matagorda County, Texas, to produce carbon-neutral gasoline. When operational, the HIF Matagorda eFuels Facility will produce fuel that can be dropped-in to vehicles in use today without any modification to existing engines or the infrastructure on which they depend. Come hear more about this innovative technology and the Matagorda facility from Bechtel Energy and HIF Global.
24/7 carbon-free energy: from startup to scale in houston
Mitsubishi Heavy Industries + Fervo Energy
Thursday, March 21 | 2 p.m.
Tim Latimer, Chief Executive Officer, Fervo Energy
Takajiro Ishikawa, President & CEO, Mitsubishi Heavy Industries
Mitsubishi Heavy Industries (MHI) announced its investment in Fervo Energy (Fervo), an innovative enhanced geothermal technology startup headquartered in Houston, Texas. MHI joins a consortium of strategic investors, including Devon Energy Corporation (Devon), Marunouchi Innovation Partners (MIP). Over the last few years, Fervo has adapted innovations pioneered by the oil and gas industry, such as horizontal drilling and distributed fiber optic sensing, to make reservoirs of hot rock that exist beneath the earth’s surface into practical, economically viable, carbon-free sources of energy that can be used as heat sources both for industrial and power generation. Learn more about how this clean energy startup is commercializing solutions for the transitions by building relationships with world leading energy and technology companies.
Energy Tech Innovation Lounge (no badge required)
Houston Innovation Leaders and Founders is hosting a free Energy Tech Innovation Lounge that's open daily from 10 am to 5 pm at 808 Travis Street. Each day has programing and networking — click here to learn more.
INPEX Corp. and Green Hydrogen International have agreed to a Joint Study Agreement to advance a South Texas hydrogen production facility called "Hydrogen City." Photo via Getty Images
An oil and gas exploration and production company has signed on to collaborate on a green hydrogen project in Texas to keep up with growing global market demand.
INPEX Corp. and Green Hydrogen International have agreed to a Joint Study Agreement to advance a South Texas hydrogen production facility called "Hydrogen City." The project's first phase will produce 280,000 tons per year of green hydrogen and 1 million tons per year of green ammonia. Construction is slated to begin in 2026 with commercial operation expected in 2029.
INPEX's "unparalleled expertise in large energy project development combined with a world-class marketing organization will provide enormous advantages to the Hydrogen City project and our goal of producing the world's lowest-cost green hydrogen by 2029," Brian Maxwell, CEO of GHI, says in a news release.
The partnership brings together both entities' expertise, with INPEX's experience developing large scale energy projects and marketing LNG to international customers. Meanwhile, GHI uses salt cavern storage and behind-the-meter renewable power to produce low-cost green hydrogen.
"I am excited to announce this green hydrogen project in Texas, which exemplifies our unwavering commitment to environmental leadership and innovation," INPEX Representative Director, President, and CEO Takayuki Ueda says in the release. "INPEX's dedication to a brighter, greener future remains steadfast, and this endeavor in Texas marks a pivotal step in our vision for a more sustainable tomorrow."
INPEX is also a part of a large-scale, low-carbon ammonia production and export project on the Houston Ship Channel that was anounced ealier this month.
Hydrogen City, located in South Texas atop the Peidras Pintas Salt Dome, was originally announced in March 2022. There will be a 75 mile pipeline from Hydrogen City to Corpus Christi, supplying a 1 Million Tonne Per Annum (MTPA) ammonia production facility and local off-takers.
Houston maintained its No. 3 status this year among U.S. metro areas with the most Fortune 500 headquarters. Fortune magazine tallied 26 Fortune 500 headquarters in the Houston area, behind only the New York City area (62) and the Chicago area (30).
Last year, 23 Houston-area companies landed on the Fortune 500 list. Fortune bases the list on revenue that a public or private company earns during its 2024 budget year.
On the Fortune 500 list for 2025, Spring-based ExxonMobil remained the highest-ranked company based in the Houston area as well as in Texas, sitting at No. 8 nationally. That’s down one spot from its No. 7 perch on the 2024 list. During its 2024 budget year, ExxonMobil reported revenue of $349.6 billion, up from $344.6 billion the previous year.
Here are the rankings and 2024 revenue for the 25 other Houston-area companies that made this year’s Fortune 500:
Nationally, the top five Fortune 500 companies are:
Walmart
Amazon
UnitedHealth Group
Apple
CVS Health
“The Fortune 500 is a literal roadmap to the rise and fall of markets, a reliable playbook of the world's most important regions, services, and products, and an indispensable roster of those companies' dynamic leaders,” Anastasia Nyrkovskaya, CEO of Fortune Media, said in a news release.
Among the states, Texas ranks second for the number of Fortune 500 headquarters (54), preceded by California (58) and followed by New York (53).
Three Houston companies claimed spots on LexisNexis's 10 Most Innovative Startups in Texas report, with two working in the geothermal energy space.
Sage Geosystems claimed the No. 3 spot on the list, and Fervo Energy followed closely behind at No. 5. Fintech unicorn HighRadius rounded out the list of Houston companies at No. 8.
LexisNexis Intellectual Property Solutions compiled the report. It was based on each company's Patent Asset Index, a proprietary metric from LexisNexis that identifies the strength and value of each company’s patent assets based on factors such as patent quality, geographic scope and size of the portfolio.
Houston tied with Austin, each with three companies represented on the list. Caris Life Sciences, a biotechnology company based in Dallas, claimed the top spot with a Patent Asset Index more than 5 times that of its next competitor, Apptronik, an Austin-based AI-powered humanoid robotics company.
“Texas has always been fertile ground for bold entrepreneurs, and these innovative startups carry that tradition forward with strong businesses based on outstanding patent assets,” Marco Richter, senior director of IP analytics and strategy for LexisNexis Intellectual Property Solutions, said in a release. “These companies have proven their innovation by creating the most valuable patent portfolios in a state that’s known for game-changing inventions and cutting-edge technologies.We are pleased to recognize Texas’ most innovative startups for turning their ideas into patented innovations and look forward to watching them scale, disrupt, and thrive on the foundation they’ve laid today.”
This year's list reflects a range in location and industry. Here's the full list of LexisNexis' 10 Most Innovative Startups in Texas, ranked by patent portfolios.
Fervo Energy fully contracted its flagship 500 MW geothermal development, Cape Station, this spring. Cape Station is currently one of the world’s largest enhanced geothermal systems (EGS) developments, and the station will begin to deliver electricity to the grid in 2026. The company was recently named North American Company of the Year by research and consulting firm Cleantech Group and came in at No. 6 on Time magazine and Statista’s list of America’s Top GreenTech Companies of 2025. It's now considered a unicorn, meaning its valuation as a private company has surpassed $1 billion.
Meanwhile, HighRadius announced earlier this year that it plans to release a fully autonomous finance platform for the "office of the CFO" by 2027. The company reached unicorn status in 2020.
The climate conversation is evolving — fast. It’s no longer just about emissions targets and net-zero commitments. It’s about capital, infrastructure, and execution at industrial scale.
That’s exactly where Yao Huang operates. A seasoned tech entrepreneur turned climate investor, Yao brings sharp clarity to one of the biggest challenges in climate innovation: how do we fund and scale technologies that remove carbon without relying on goodwill or government subsidies?
In this episode of the Energy Tech Startups Podcast, Yao sits down with hosts Jason Ethier and Nada Ahmed for a wide-ranging conversation that redefines how we think about decarbonization. From algae-based photobioreactors that capture CO₂ at the smokestack, to financing models that mirror real estate and infrastructure—not venture capital—Yao lays out a case for why the climate fight will be won or lost on spreadsheets, not slogans.
Her message is as bold as it is practical: this isn’t about saving the planet for the sake of it. It’s about building profitable, resilient systems that scale. And Houston, with its industrial base and project finance expertise, is exactly the place to do it.
The 40-Gigaton Challenge—and a Pandemic Pivot
Yao’s entry into climate wasn’t part of a long-term plan. It was sparked by a quiet moment during the pandemic—and a book.
Reading How to Avoid a Climate Disaster by Bill Gates, she came to two uncomfortable realizations:
The people in power don’t actually have this figured out, and
She would be alive to suffer the consequences.
That insight jolted her out of the traditional tech world and into climate action. She studied at Stanford, surrounded herself with mentors, and began diving into early-stage climate deals. But she quickly realized that most of the solutions she was seeing were still years away from commercialization.
So she narrowed her focus: no R&D moonshots, no science experiments—just deployable solutions that could scale now.
Carbon Optimum: Where Algae Meets Infrastructure
That’s how she found Carbon Optimum, a company using algae photobioreactors to remove CO₂ directly from industrial emissions. Their approach is both elegant and economic:
Install algae reactors next to major emitters like coal and cement plants.
Feed the algae with flue gas, allowing it to absorb CO₂ in a controlled system.
Harvest the algae and convert it into valuable commodities like bio-oils, fertilizer, and food ingredients.
It’s a nature-based solution, enhanced by engineering. One acre of tanks can capture emissions and generate profit—without subsidies.
“This is one of the few solutions I’ve seen that can scale profitably and quickly,” Yao says. “And we’re not inventing anything new—we’re just doing it better.”
The Real Problem? It’s Capital, Not Carbon
As an investor, Yao is blunt: most climate startups are misaligned with the capital markets.
They’re following a tech startup playbook—built for SaaS, not steel. But building climate infrastructure requires a completely different approach: project finance, blended capital, debt structures, carbon credit integration, and regulatory incentives.
“Climate tech is more like real estate or healthcare than software,” Yao explains. “You don’t raise six rounds of venture. You build a stack—grants, equity, debt, tax credits—and you structure your project like infrastructure.”
It’s not just theory. It’s exactly how Carbon Optimum is expanding—through partnerships, offtake agreements, and real-world deployments. And it’s why she believes many climate startups fail: they don’t speak the language of finance.
Houston’s Role in the Climate Capital Stack
For Yao, Houston isn’t just a backdrop—it’s a strategic asset.
The city’s deep bench of project finance professionals, commodity traders, lawyers, and infrastructure veterans makes it uniquely positioned to lead the deployment phase of climate solutions.
“We’ve been calling it the wrong thing,” she says. “This isn’t just about climate—it’s an energy transition. And Houston knows how to build energy infrastructure at scale.”
Still, she notes, the ecosystem needs to evolve. Less education, more execution. Fewer workshops, more closers.
“Houston could be the epicenter of this movement—if we activate the right people and get the right projects over the line.”
From Carbon Capture to Circular Economies
The potential applications of Carbon Optimum’s algae platform go beyond carbon capture. Because the output—algae biomass—can be converted into:
Renewable oil
High-efficiency fertilizers (critical in today’s geopolitically fragile supply chains)
Food ingredients rich in protein and nutrients
Even biochar, a highly stable form of carbon sequestration
It’s scalable, modular, and location-agnostic. In island nations, Yao notes, these systems can offer energy independence by turning waste CO₂ into local energy and fertilizer—without needing to import fuels or food.
“It’s not just emissions reduction. It’s economic sovereignty through circular systems.”
Doing, Not Just Talking
One of Yao’s key takeaways for founders? Don’t waste time. Climate startups don’t have the luxury of trial-and-error cycles stretched over years.
“Founders need to get real about what it takes to scale: talent, capital, storytelling, partnerships. If you’re not ready to do that, maybe you should be a CSO, not a CEO.”
She also points out that founders don’t need to hire everyone—they need to tap the right networks. And in cities like Houston, those networks exist—if you know how to motivate them.
“It takes a different kind of leadership. You’re not just raising money—you’re moving people.”
Why This Episode Matters
This conversation is for anyone who’s serious about scaling real solutions to the climate crisis. Whether you’re a founder navigating capital markets, an investor seeking return and impact, or a policymaker designing the frameworks — Yao Huang offers a grounded, urgent, and actionable perspective.
It’s not about hope. It’s about execution.
Listen to the full episode of the Energy Tech Startups Podcast with Yao Huang:
-- Hosted by Jason Ethier and Nada Ahmed, the Digital Wildcatters’ podcast, Energy Tech Startups, delves into Houston's pivotal role in the energy transition, spotlighting entrepreneurs and industry leaders shaping a low-carbon future.
Image via ghi-corp.com