Assessing the carbon capture capacity of South Wales' legacy iron and steel slag
Assessing the carbon capture capacity of South Wales' legacy iron and steel slag
复制标题
评估南威尔士遗留钢铁炉渣的碳捕获能力
DOI：
10.1016/j.mineng.2021.107232
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发表时间：
2021
影响因子：
4.8
通讯作者：
Chukwuma J
中科院分区：
文献类型：
--
作者：
Chukwuma J
工业革命向大气中释放了超过1.5万亿吨二氧化碳，导致全球气温上升1.1 °C。它还产生了数十亿吨的碱性材料，这些材料有可能与其中的一些二氧化碳发生反应，这种碳捕获潜力可以用来帮助防止气候变化。在这里，我们评估了英国南威尔士遗留铁（Fe）和钢铁废物的碳捕获潜力，并且表明在样品中已经达到总碳酸化潜力的0和77%之间（相当于通过直接碳酸化从大气中去除40至608 kg CO2/t炉渣的最大潜力）（在该地区运营的48家中），即使在> 140年之后。目前的工作表明，有一个捕获的潜力高达17吨二氧化碳的直接碳酸化，这是一个潜在的碳汇为未来的排放。铁和钢渣含有Ca硅酸盐矿物，通常以黄长石族相（钙黄长石，Ca 2Al 2SiO 7和镁黄长石，Ca 2 MgSi 2 O 7）为主，但也包括次要相如橄榄石（铁橄榄石，（Fe，Mn）2SiO 4和镁橄榄石，Mg 2SiO 4）。矿物碳酸盐相如方解石、菱镁矿、铁白云石和钾镁矾在材料中的存在表明在炉渣形成后发生了碳酸化反应。考虑到仍有碳化潜力有待实现，以及未来钢铁工业生产的材料可能在实现我们的气候目标方面发挥重要作用，因此需要新的管理策略来最大限度地利用这种资源。
The industrial revolution was responsible for releasing over 1.5 trillion tonnes of carbon dioxide into the atmosphere resulting in a global temperature increase of ∼1 °C. It also produced billions of tonnes of alkaline materials that have the potential to react with some of that CO2, and this carbon capture potential may be used to help prevent climate change. Here we assess the carbon capture potential of legacy iron (Fe) and steel wastes in South Wales, the United Kingdom, and show that between 0 and 77% of total carbonation potential has been reached in the samples (equating to maximum potential between 40 and 608 kg CO2/t of slag has been removed from the atmosphere by direct carbonation) across 10 historic works (out of 48 that operated in the region), even after > 140 years. The current work suggests that there is a capture potential of up to 17 Mt CO2by direct carbonation which represents a potential carbon sink for future emissions. Iron and steel slag contains Ca silicate minerals, often dominated by melilite group phases (gehlenite, Ca2Al2SiO7and akermanite, Ca2MgSi2O7), but also includes minor phases like olivine (fayalite, (Fe,Mn)2SiO4and fosterite, Mg2SiO4). The presence of mineral carbonate phases such as calcite, magnesite, ankerite, and kutnohorite in the material demonstrates carbonation reaction has occurred after slag formation. Given that there is still carbonation potential to be realised, and that materials produced in the future from the iron and steel industry could play an important role in meeting our climate targets, then new management strategies are needed to maximise the use of this resource.