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Adnoc to buy 35% stake in ExxonMobil hydrogen plant

ExxonMobil chairman Darren Woods and Adnoc Group CEO Sultan Ahmed Al Jaber sign the agreement in the presence of Abu Dhabi crown prince Sheikh Khaled bin Mohamed bin Zayed Al Nahyan Adnoc
ExxonMobil chairman Darren Woods and Adnoc Group CEO Sultan Ahmed Al Jaber sign the agreement in the presence of Abu Dhabi crown prince Sheikh Khaled bin Mohamed bin Zayed Al Nahyan

State-owned Abu Dhabi National Oil Company (Adnoc) will acquire a 35 percent stake in US energy company ExxonMobil’s planned large-scale hydrogen and ammonia production facility in Texas.

The production facility – expected to be the world’s largest of its kind upon startup – intends to produce up to one billion cubic feet per day of low-carbon hydrogen, with around 98 percent of carbon dioxide removed, and more than one million tonnes of low-carbon ammonia per year.

The agreement aims to reduce greenhouse gas emissions across hard-to-decarbonise sectors, including industry, energy and transportation, accelerating a net-zero future.



The facility will also leverage advanced carbon capture and storage technologies to reduce emissions associated with hydrogen production.

It may produce blue ammonia, which could be supplied either to northeast Asia or Europe, Adnoc executive vice president of low carbon solutions and business development Michele Fiorentino told Reuters.

The value of Adnoc’s investment was not given.

The facility is still contingent on supportive government policy and necessary regulatory permits, according to an Exxon Mobile statement. 

The project has seen delays and uncertainties as the US government reduced incentives for natural gas-run facilities.

A final investment decision was pushed from 2024 to 2025, with an anticipated start in 2029.

Sultan Al Jaber, Adnoc group CEO, said that this strategic investment is a significant step for the company as “we grow our portfolio of lower-carbon energy sources and deliver on our international growth strategy.”

Last year, Adnoc started building the Middle East’s first high-speed hydrogen refuelling station, which will create clean hydrogen from water using an electrolyser powered by clean grid electricity.

The UAE oil company has allocated AED55 billion ($15 billion) to develop decarbonisation technologies to reduce carbon intensity by 25 percent by 2030 and reach its net zero targets by 2045.

The hydrogen rainbow

  • Green hydrogen is produced on a carbon-neutral basis through water electrolysis. 
  • Turquoise hydrogen is created when natural gas is broken down into hydrogen and solid carbon with the help of methane pyrolysis.
  • Blue hydrogen is generated from the steam reduction of natural gas. 
  • Grey hydrogen is obtained by steam reforming fossil fuels such as natural gas or coal. 
  • Sometimes other colours are ascribed to hydrogen, based on how it is produced. For red, pink and violet hydrogen, the electrolysers are driven by nuclear power. 
  • Yellow hydrogen is hydrogen produced from a mixture of renewable energies and fossil fuels. 
  • White hydrogen is a waste product of other chemical processes, while the use of coal as a fuel produces brown hydrogen.

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