SBIR Phase I: Reducing Emissions and Cost in the Production of Conventional Cementitious Materials

小型企业创新研究(SBIR)第一阶段项目的更广泛影响是降低与波特兰水泥相关的成本和环境影响，波特兰水泥是最常见的通用水泥。一种制造波特兰水泥的新工艺近100年来没有被引入，其产量占全球温室气体排放量的5.5%，其中60%来自岩石，其余来自过程中使用的燃料。该项目提出了一种可以减少排放的不同工艺。目前，水泥是通过石灰石的热分解来产生石灰和二氧化碳的。该项目提出了一种从非碳酸盐岩中选择性提取钙以转化为水泥的技术。这个过程还会产生无定形二氧化硅作为副产品。由于钙与碳酸盐无关，因此减少了与制造过程相关的排放。这项研究将重点放在工艺流程中含钙化合物的热分解，以使硅酸钙作为水泥的基础。该奖项反映了NSF的法定使命，并通过使用基金会的智力优势和更广泛的影响审查标准进行评估，被认为值得支持。

The broader impact of this Small Business Innovation Research (SBIR) Phase I project is to reduce cost and environmental impact associated with Portland cement, the most common general-purpose cement. A new process for making Portland cement has not been introduced in nearly 100 years, and its production accounts for for 5.5% of global greenhouse gas emissions, with 60% from the rock and the remainder from the fuel used in the process. This project proposes a different process that can reduce emissions. Currently cement is made via the thermal decomposition of limestone to produce lime and CO2. This project advances a technology based on selective extraction of calcium from non-carbonate rocks for conversion into cement. The process also produces amorphous silica as a byproduct. Because calcium is not associated with carbonate, the emissions associated with manufacturing process are reduced. This research will be focused on thermal decomposition of the calcium-bearing compound in the process stream to make calcium silicates as a basis for the cement.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.