Search results for: “DAC "direct air capture"”

February 12, 2025

Leilac low-carbon cement technology?

This data-file explores Leilac low-carbon cement technology, which separates the calcination stage, within an indirectly heated reactor, so that 98% pure CO2 can be gathered and sequestered, with requiring post-combustion CCS (amines). Patents from parent company, Calix, lock up the technology, with clear and intelligible details, although this also shows where the challenges are.
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Midstream opportunities in the energy transition?

The midstream industry moves molecules, especially energy-molecules, and especially in pipelines. Despite the mega-trend of electrification, there are still strong midstream opportunities in the energy transition, backstopping volatility and moving new molecules. This short note captures our top ten conclusions. (1) Our overall outlook on the US midstream industry sees the total tonnage of molecules…
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CCS: what CO2 purity for transport and disposal?

The minimum CO2 purity for CCS starts at 90%, while a typical CO2 disposal site requires 95%, CO2-EOR requires 96%, CO2 pipelines require 97% and CO2 liquefaction or shipping requires >99%. This data-file aggregates numbers from technical papers and seeks to explain CO2 purity for transport and disposal.
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Gas dehydration: costs and economics?

Gas dehydration costs might run to $0.02/mcf, with an energy penalty of 0.03%, to remove around 90% of the water from a wellhead gas stream using a TEG absorption unit, and satisfy downstream requirements for 4-7lb/mmcf maximum water content. This data-file captures the economics of gas dehydration, to earn a 10% IRR off $25,000/mmcfd capex.
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Nature-based CO2 removals: a summary?

This data-file aggregates the details of different nature-based CO2 removals projects that we have been supporting at Thunder Said Energy. The average nature-based reforestation initiative that we supported in 2022 scored 70/100 on our framework. Statistical details and distributions are explored.
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CO2 concentrations in industrial exhaust streams?

The aim of this data-file is to compile CO2 concentrations in industrial exhaust streams, as a molar percentage of flue gas. This matters for the costs of CO2 separation. Most promising CCS candidates are bio-ethanol plants, industrial hydrogen production and some gas processing, followed by cement and steel plants.
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Commercial aviation: fuel economy of planes?

This data-file calculates the fuel economy of planes from first principles, using physics to calculate lift and drag, and comparing with actual data from aircraft manufacturers. The typical fuel economy of a plane is 80 passenger-mpg to carry 400 passengers, 8,000km at 900kmph, using jet fuel with 12,000 Wh/kg energy density. What sensitivities and decarbonization…
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