CO₂-removal News

Freeman (2022): Tools for climate solutions: Developing techniques for marine carbon dioxide removal measurement, reporting and validation

Simon Freeman IN: The Journal of the Acoustical Society of America 151, A242 (2022);

The author discuss ARPA-E’s interest in carbon sensing approaches, including passive and active acoustic techniques, which could rapidly quantify ocean carbon flux at scale and introduce powerful tools to address the challenges of mitigating climate impacts at sea.


Kikkawa et al. (2022): Direct Air Capture of CO2 Using a Liquid Amine–Solid Carbamic Acid Phase-Separation System Using Diamines Bearing an Aminocyclohexyl Group

Soichi Kikkawa, Kazushi Amamoto, Yu Fujiki, Jun Hirayama, Gen Kato, Hiroki Miura, Tetsuya Shishido, Seiji Yamazoe IN: ACS (American Chemical Society) Environment;

The phase separation between a liquid amine and the solid carbamic acid exhibited >99% CO2 removal efficiency under a 400 ppm CO2 flow system using diamines bearing an aminocyclohexyl group. Among them, isophorone diamine [IPDA; 3-(aminomethyl)-3,5,5-trimethylcyclohexylamine] exhibited the highest CO2 removal efficiency.


Research Topic on Frontiers: Constraining the potential of land-based Negative Emissions Technologies (NETs) from a data-driven perspective

Submission Deadlines: Abstract – 13 July 2022; Manuscript – 14 September 2022

In this Research Topic of the Frontiers Journal, the editors aim to constrain the weathering rate of rock powders spread on soils in the field by collecting research that focuses on field measurement data over local, regional, or global scales. In addition, secondary CO2 emissions from the ERW supply chain (e.g., mining, grinding, transport, spread) needs to be quantified in order to draw a holistic picture of net lifecycle CDR through ERW. Furthermore, the impact of ERW on the soil and food security needs to be further investigated.


Growing the carbon dioxide removal market

Series: „Catalyst“ by Shayle Kann on canary media

In this episode, Shayle explores CDR with Ryan Orbuch, a partner at Lowercarbon Capital who leads the firm’s carbon-removal work. Ryan helped to start Stripe’s carbon-removal procurement program and has been involved in Stripe’s nearly $1 billion Frontier Fund.  Key questions around CDR including: What are the key characteristics of an effective carbon-removal technology? What roles do permanence and additionality play? Will investments in removal come at the expense of reducing emissions? Will CDR become a commodity market?


A startup in Hawaii just launched an ocean-assisted carbon removal plant


„On a remote stretch of coastline on the Big Island of Hawaii, a startup is pioneering “ocean-assisted” carbon removal—a process that can both permanently store CO2 and help reduce ocean acidification. The startup, called Heimdal, pumps saltwater into a machine that uses electricity to rearrange molecules in the water, removing acid. It can then sell the acid it removes, which ends up in the form of hydrochloric acid.“


Workshop: Marine Carbon Dioxide Removal: Essential Science and Problem Solving for Measurement, Reporting, and Verification

September 26-30, 2022 (The University of Rhode Island)

The central goal of this workshop is to build the OCB (Ocean Carbon & Biogeochemistry) community’s capacity to conduct research to support the Measurement, Reporting and Verification (MRV) of marine CDR by identifying priorities, pathways and best practices in this relatively new area. This in-person workshop is designed for those with background knowledge in marine CDR already so the participants can collectively grapple with the science needed to measure and verify CDR in marine environments.