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

这一小企业创新研究（SBIR）第一阶段项目的更广泛的影响是降低成本和环境影响与波特兰水泥，最常见的通用水泥。 波特兰水泥的新生产工艺已经有近100年没有被引入了，其生产占全球温室气体排放量的5.5%，其中60%来自岩石，其余来自该过程中使用的燃料。该项目提出了一种不同的工艺，可以减少排放。目前，水泥是通过石灰石的热分解产生石灰和二氧化碳来制造的。该项目提出了一种基于从非碳酸盐岩中选择性提取钙以转化为水泥的技术。该过程还产生无定形二氧化硅作为副产物。由于钙不与碳酸盐相关联，因此减少了与制造过程相关的排放。 这项研究将集中在含钙化合物的热分解过程中的流，使硅酸钙作为水泥的基础。这个奖项反映了NSF的法定使命，并已被认为是值得通过评估使用基金会的智力价值和更广泛的影响审查标准的支持。

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.