利用预处理的电弧炉炼钢袋式除尘器加速气固碳化封存 CO2。
CO2 sequestration using accelerated gas-solid carbonation of pre-treated EAF steel-making bag house dust.
机构信息
Chemical and Petroleum Engineering Department, UAE University, P.O. Box 15551, Al-Ain, United Arab Emirates.
Chemical and Petroleum Engineering Department, UAE University, P.O. Box 15551, Al-Ain, United Arab Emirates.
出版信息
J Environ Manage. 2015 Jun 1;156:218-24. doi: 10.1016/j.jenvman.2015.03.040. Epub 2015 Apr 4.
Mineral CO2 sequestration is a promising process for the reduction of carbon dioxide emissions to the atmosphere. In this paper, alkaline calcium-rich dust particles collected from bag filters of electric arc furnaces (EAF) for steel making were utilized as a viable raw material for mineral CO2 sequestration. The dust particles were pre-treated through hydration, drying and screening. The pre-treated particles were then subjected to direct gas-solid carbonation reaction in a fluidized-bed reactor. The carbonated products were characterized to determine the overall sequestration capacity and the mineralogical structures. Leaching tests were also performed to measure the extracted minerals from the carbonated dust and evaluate the carbonation process on dust stabilization. The experimental results indicated that CO2 could be sequestered using the pre-treated bag house dust. The maximum sequestration of CO2 was 0.657 kg/kg of dust, based on the total calcium content. The highest degree of carbonation achieved was 42.5% and the carbonation efficiency was 69% at room temperature.
矿物 CO2 封存是减少二氧化碳向大气排放的一种很有前途的方法。本文利用从电弧炉（EAF）袋式过滤器收集的碱性富钙粉尘颗粒作为矿物 CO2 封存的可行原料。粉尘颗粒经过水合、干燥和筛选进行预处理。然后，预处理后的颗粒在流化床反应器中进行直接气固碳化反应。对碳酸化产物进行了特征分析，以确定总的封存能力和矿物结构。还进行了浸出试验，以测量从碳酸化粉尘中提取的矿物质，并评估对粉尘稳定化的碳酸化过程。实验结果表明，预处理后的袋式除尘器粉尘可以封存 CO2。基于总钙含量，CO2 的最大封存量为 0.657kg/kg 粉尘。在室温下，最大碳酸化程度为 42.5%，碳酸化效率为 69%。
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