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

0315814 Sohn描述：该奖项是为了支持一个合作研究项目，博士H. Y。Sohn，犹他州大学冶金工程系，湖城，犹他州和Yasser Ahmed博士，中央冶金研究与发展研究所（CMRDI），赫勒万，埃及。 大量的二氧化硫产生于不同的工业，往往造成严重的空气污染。PI计划开发一种将二氧化硫转化为元素硫的新工艺，而不会产生固体废物或气体污染物。 它涉及使二氧化硫与硫化钙反应以产生元素硫，并通过重整天然气或氢气还原所产生的硫酸钙以再生硫化钙。这种循环反应方案是基于对可能的反应系统的热力学分析而构思的，该反应系统可以将二氧化硫转化为元素硫而不产生气体或固体废物。该方法的优点是在第一反应中几乎不产生除硫以外的气体产物，并且硫化钙和无害气体如水蒸气是第二反应中仅有的产物。这项研究将涉及各种条件下反应速率的测定。由于固体将在工艺中重复使用，因此将确定再生硫化钙与二氧化硫在许多再生循环中的反应性。 此外，将选择有效提高SO2还原反应速率的催化剂，并测试其有效性。 范围：该研究旨在解决许多工业国家面临的一个严重问题。最终目标是开发一种将二氧化硫转化为元素硫的有效方法。拟议的合作是在一个教育机构和一个研究组织之间进行的，因此将联合收割机结合学习、教学和培训当前和未来的研究人员。学生将学习技术开发的理论和实验室方法，以及如何对结果进行进一步评估。参与研究组织的研究人员将保持与学术实验室的联系，并提高他们在研究和解决问题的基本理论方法方面的技能。这项工作的结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，因为它们对环境有影响，具有国际重要性。犹他州大学的拟议实验室工作将由一名女性工程学研究生（Maria Savic）执行。 该项目得到了美国-埃及联合基金方案的支持，该方案向两国的科学家和工程师提供赠款，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.