CCUS|


Carbon capture begins at NTPC power plant


NTPC’s Vindhyachal power plant (photo: NTPC)


CDRMax™ carbon capture equipment installed at


Vindhyachal unit 13 (photo: Carbon Clean)


, with a purity of over 99%, will eventually be combined with hydrogen to produce 10 tonnes per day of methanol via a catalytic hydrogenation process.


A 20 t/day demo carbon capture facility is in operation at NTPC’s coal fired Vindhyachal Super Thermal Power Station, Madhya Pradesh, India. NTPC Energy Technology Research Alliance (NETRA) selected Carbon Clean and EPC contractor Green Power International Pvt Ltd to install the carbon capture plant, which employs Carbon Clean’s CDRMax™ capture technology. The CO2


seven 500 MWe units at the site, which also hosts six 210 MWe units. The capture of CO2


from the flue gas of coal-fired


power plants, and its conversion to methanol, is said to be a priority area for NTPC and is “expected to create potential new business opportunities and revenue streams for the company.’


Carbon Clean’s CDRMax™ process, which uses a tertiary amine and can work with flue gases with CO2


The carbon capture system has been installed at unit 13 of the Vindhyachal power plant, one of


Basic scheme of Carbon Clean’s CDRMax™ process (source: Carbon Clean)


Key: 1 - absorption 2 - heating 3 – separation 4 – regeneration 5 – sequestration/use


concentrations between 3% and 25% by volume, employs Carbon Clean’s proprietary solvent, process equipment design, and advanced heat integration to “significantly reduce both capital and operating costs.”


Mammoth DAC project in Iceland moves to due diligence


The world’s largest commercial-scale direct air capture (DAC) project (capturing carbon dioxide directly from the air), is “being contemplated” in Iceland, says Ramboll, which has recently been selected by DAC technology developer Climeworks to carry out a due diligence study. In 2021, Climeworks put into operation the largest direct air capture & storage plant to date, Orca, in Hellisheiði, Iceland. This plant has a nominal capture capacity of up to 4000 tonnes of CO2


annually. The captured CO2


underground by Climeworks’ storage partner Carbfix, where it will eventually turn into rock through mineralisation.


Climeworks has initiated the new plant, called Mammoth, in the same location as Orca. It will be around ten times bigger, expected to capture up to 36 000 tonnes of CO2


annually.


The longer term goal, however, is to scale up to reach multi-megaton capacity in the 2030s and be on track to achieve gigaton capacity by 2050. Ramboll, which was involved in Orca, has again been chosen to provide independent engineer services to Climeworks, including technical, environmental and commercial due diligence for the project with a primary focus on the technical


aspects. The key objective of the independent engineer review, says Ramboll, is to provide a basis for a potential investor (or investors) to invest in the Mammoth project.


“Ramboll has in-depth knowledge of direct air capture technology and already gained experience through their involvement in the Orca plant. We are pleased to continue the collaboration on the Mammoth project too”, said Birk Teuchert, head of corporate finance at Climeworks.Thomas Hyldgard


is stored deep


Christensen, manager of the project at Ramboll, said: “Very few plants of this type are in operation worldwide. They are key to reaching global climate goals, and one of the first steps is upscaling like here in Iceland.”


The propose new DAC plant will be located near the Hellisheiði geothermal power plant, which will provide renewable energy to power the capture process. Construction is expected to last 18-24 months.


Above: Rendering of the planned Mammoth DAC plant (© 2022 Climeworks) 22 | November/December 2022| www.modernpowersystems.com


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