Paul Wermer, CC BY-NC-SA 4.0<p>Definitely encouraging as far as shipping emissions goes, and I appreciate that the quicklime used in the process will be produced with renewable energy - but, as I understand the normal process for making quicklime, limestone aka calcium carbonate (CaCO3) is baked at high temperatures, driving the chemical reaction CaCO3 > CaO + CO2.</p><p>And what is not addressed is how to manage the CO2 from this reaction - Yes, it can (in principle) be captured, but then what do you do with it? This is especially important, because the same problem applies to lime-based cement. I'd love to see a critique of this issue, it's at the core of the CCS/CCSU debates. I have not yet seen a good answer from eg SaltX or ZEQL.</p><p><a href="https://www.theguardian.com/environment/2025/jun/26/global-shipping-emissions-invention-clean-up-cargo-fleets-net-zero?CMP=Share_AndroidApp_Other" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://www.</span><span class="ellipsis">theguardian.com/environment/20</span><span class="invisible">25/jun/26/global-shipping-emissions-invention-clean-up-cargo-fleets-net-zero?CMP=Share_AndroidApp_Other</span></a></p><p><a href="https://sfba.social/tags/CCS" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>CCS</span></a> <a href="https://sfba.social/tags/ClimateAction" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>ClimateAction</span></a> <a href="https://sfba.social/tags/greenshipping" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>greenshipping</span></a></p>