US-Egypt Cooperative Research: A New Process for Converting SO2 to Sulfur Without Generating Secondary Pollutants Through Reactions With CaS/CaSO4 Pellets

该奖项旨在支持犹他州盐湖城犹他大学冶金工程系H.Y.Sohn博士和埃及赫尔万中央冶金研究开发研究所(CMRDI)Yasser Ahmed博士之间的合作研究项目。不同行业产生大量二氧化硫，往往造成严重的空气污染。PIS计划开发一种新的工艺，将二氧化硫转化为元素硫，而不会产生固体废物或气态污染物。它包括二氧化硫与硫化钙反应生成单质硫，以及通过重整天然气或氢气还原生成的硫酸钙以再生硫化钙。这一循环反应方案是基于对可能的反应体系的热力学分析而构思的，这些反应体系可以将二氧化硫转化为元素硫，而不会产生气态或固体废物。该工艺的优点是第一步反应生成的硫磺以外的气态产物很少，第二步反应仅生成硫化钙和水蒸气等无害气体。这项研究将包括测定各种条件下的反应速度。由于固体将在该过程中重复使用，因此将确定在多次再生循环中再生的硫化钙与二氧化硫的反应性。此外，还将选择在提高SO2还原反应速度方面有效的催化剂，并对其有效性进行测试。范围：这项研究寻求解决许多工业国家面临的严重问题。开发一种有效的将二氧化硫转化为元素硫的方法是最终的目标。拟议的合作是一家教育机构和一个研究机构之间的合作，因此将结合学习、教学和培训当前和未来的研究人员的方面。学生将学习技术开发的理论和实验室方法，以及如何在实施过程中进一步评估结果。参与研究组织的研究人员将保持与学术实验室的联系，并在基础理论研究和解决问题方面磨练技能。鉴于其对环境的影响和国际重要性，这项工作的成果将通过技术出版物、国际讲习班、多学科会议和新闻媒体广泛传播。犹他大学拟议的实验室工作将由一名女性工程学研究生(玛丽亚·萨维奇)执行。该项目得到了美国-埃及联合基金计划的支持，该计划为两国的科学家和工程师提供资助，以开展这些合作活动。

0315814SohnDescription: This award is to support a cooperative research project between Dr. H.Y. Sohn, Department of Metallurgical Engineering, University of Utah, Salt lake City, Utah and Dr. Yasser Ahmed, Central Metallurgical Research and Development Institute (CMRDI), Helwan, Egypt. Large quantities of sulfur dioxide are generated from different industries often causing serious air pollution. The PIs plan to develop a new process for converting sulfur dioxide to elemental sulfur without generating solid wastes or gaseous pollutants. It involves reacting sulfur dioxide with calcium sulfide to produce elemental sulfur, and reducing the produced calcium sulfate by reformed natural gas or hydrogen to regenerate the calcium sulfide. This cyclic reaction scheme has been conceived based on thermodynamic analyses of possible reaction systems that can transform sulfur dioxide to elemental sulfur without generating gaseous or solid wastes. The advantage of this proposed process is that little gaseous product other than sulfur is produced in the first reaction, and calcium sulfide and harmless gases such as water vapor are the only products in the second reaction. The research will involve the determination of the rates of the reactions under various conditions. Since the solids will be used repeatedly in the process, the reactivity of the regenerated calcium sulfide with sulfur dioxide over many regeneration cycles will be determined. Additionally, catalysts that are effective in increasing the rate of the SO2 reduction reaction will be selected and their effectiveness tested. Scope: The research seeks a solution to a serious problem that many industrial nations are facing. The development of an effective method for transforming sulfur dioxide to elemental sulfur is the ultimate objective. The proposed collaboration is between an educational institution and a research organization, and as such will combine the aspects of learning, teaching and training current and future researchers. The students will learn the theoretical and laboratory approaches to technical development and also how the results are further evaluated toward implementation. The researchers in the participation research organization will maintain their contact with academic laboratory and sharpen their skills in fundamental theoretical approach to research and problem solving. The results of this work will be disseminated widely through technical publications, international workshops, multidisciplinary meetings, and news media in view of their environmental implications and international importance. The proposed laboratory work at the University of Utah will be performed by a female graduate engineering student (Maria Savic). This project is being supported under the US-Egypt Joint Fund Program, which provides grants to scientists and engineers in both countries to carry out these cooperative activities.