The CO2 capture technology was provided by a joint venture between SLB and Aker Carbon Capture (ACC), which specializes in capturing CO2 from industrial emissions, including so-called “unavoidable” emissions, such as those from raw silicon production. A mobile test unit (MTU) from the joint venture was installed at Wacker’s Holla site. This pilot plant directed the emissions from silicon production into a chemical CO₂ capture process known as amine scrubbing. In this process, a liquid containing amine extracts CO2 from the gas mixture. In a full-scale industrial process, the CO₂ would then be separated from the liquid, liquefied, and purified.

The test phase concluded successfully at the end of June, achieving capture rates of over 95%. Additionally, the process parameters were thoroughly examined and validated. Concurrently, an engineering feasibility study was conducted, outlining a facility designed to capture 180,000 tons of CO₂ annually. These calculations were refined using data from the practical tests. Wacker’s CEO, Christian Hartel, described the pilot study’s results as a significant success, demonstrating the technology’s ability to effectively capture CO₂.