Antunes Mónica, Santos Rodrigo Lino, Pereira João, Rocha Paulo, Horta Ricardo Bayão, Colaço Rogério
IDMEC, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, 1049-001 Lisboa, Portugal.
CIMPOR Portugal Holdings, SGPS S.A., Avenida José Malhoa, 22, 1099-020 Lisboa, Portugal.
Materials (Basel). 2021 Dec 28;15(1):209. doi: 10.3390/ma15010209.
Currently, the production of one ton of ordinary Portland cement (OPC) releases considerable amounts of CO into the atmosphere. As the need and demand for this material grows exponentially, it has become a challenge to increase its production at a time when climate-related problems represent a major global concern. The two main CO contributors in this process are fossil fuel combustion to heat the rotary kiln and the chemical reaction associated with the calcination process, in the production of the clinker, the main component of OPC. The current paper presents a critical review of the existent alternative clinker technologies (ACTs) that are under an investigation trial phase or under restricted use for niche applications and that lead to reduced emissions of CO. Also, the possibility of transition of clinker production from traditional rotary kilns based on fuel combustion processes to electrification is discussed, since this may lead to the partial or even complete elimination of the CO combustion-related emissions, arising from the heating of the clinker kiln.
目前，生产一吨普通硅酸盐水泥（OPC）会向大气中释放大量的二氧化碳。随着对这种材料的需求呈指数级增长，在气候相关问题成为全球主要关注点的当下，增加其产量已成为一项挑战。该过程中两个主要的二氧化碳排放源，一是用于加热回转窑的化石燃料燃烧，二是在OPC的主要成分熟料生产过程中与煅烧过程相关的化学反应。本文对现有的替代熟料技术（ACTs）进行了批判性综述，这些技术正处于调查试验阶段或在特定应用中受到限制使用，且能减少二氧化碳排放。此外，还讨论了熟料生产从基于燃料燃烧过程的传统回转窑向电气化转变的可能性，因为这可能导致因熟料窑加热而产生的与燃烧相关的二氧化碳排放部分甚至完全消除。
