SusChEM: Collaborative Research - Granular Activated Carbon Supported Gold and Palladium Bimetals Catalysts for Sustainable Water Treatment

1507707Jiao1508115Tratnyek一组研究人员建议开发颗粒活性碳支撑的双金属催化剂，该催化剂集成了物理吸附和催化分解能力，以实现可持续的水处理。本项目的目的是设计和制备一种新型的颗粒状活性碳负载的钯-金属(双金属)催化剂，该催化剂能够快速降解污染物，而不会积累有问题的副产物，也不会对天然水的常见成分中毒(催化活性丧失)产生明显的敏感性。该项目利用了钯(Pd)和钯(Pd)双金属催化剂能够将各种有机污染物转化为无害产品的事实，本项目的重点是开发Pd-M双金属催化剂，其中M代表金(Au)、铜(Cu)、和铟(In)，实现对卤代有机物、含氧阴离子和亚硝胺等优先饮用水污染物的催化还原转化。PIS初步结果表明，建议研究的催化剂类型可以非常快速地产生三氯乙烯的加氢脱卤化反应以及其他模型污染物的加氢反应。在拟议的研究中，将开发一种绿色化学合成工艺。将通过设计用于测试特定催化机理的催化剂来系统地研究催化剂结构和性能之间的联系。用完美石墨烯和富含缺陷的石墨烯杂化的Pd-M取代颗粒活性碳的结构将被模拟，以确定最佳的表面结构、电荷转移机制、电子性质和能量分布。这类催化剂的污染物还原动力学将被系统地量化，并将开发一个实用而严格的动力学模型，以在广泛的条件下比较这些类型的催化剂。这些催化剂对水处理中常见的贵金属催化剂(如硫化物和氯化物)的已知毒物的敏感性将在优化催化剂设计时进行评估和考虑。除了推进催化加氢工艺处理水的技术外，这项拟议的研究还将有助于培训该领域的新研究人员和实践者。PIS将通过在Clackamas社区学院举办一系列计划中的研讨会来接触水服务专业人员，该学院为水处理工程师提供了强有力的培训计划。还计划与当地非正规教育的领先者俄勒冈州科学与工业博物馆合作，向公众宣传可持续水处理的示范活动。此外，我们致力于招募少数族裔和女性研究生参与这项拟议的研究。

1507707Jiao1508115TratnyekA team of researchers propose to develop granular activated carbon supported bimetal catalysts that integrate both physic-sorption and catalytic decomposition capabilities to achieve sustainable water treatment. The objective of the proposed project is to design and fabricate a novel class of granular activated carbon-supported palladium-metal (bimetal) catalysts that provides rapid contaminant degradation without accumulation of problematic by-products or significant susceptibility to poisoning (loss of catalytic activity) by common components of natural water.This project takes advantage of the fact that catalytic hydrodehalogenation and hydrodeoxygenation by palladium (Pd) and Pd-based bimetal catalysts are capable of transforming various classes of organic contaminants to harmless products, this proposed research is focused on developing Pd-M bimetal catalysts where M represents gold (Au), copper (Cu), and indium (In) to achieve catalytic reductive transformation of priority drinking water contaminants such as halogenated organics, oxyanions, and nitrosamines. The PIs preliminary results show that the types of catalysts proposed to study can produce very rapid hydrodehalogenation of trichloroethene as well as hydrogenation of other model contaminants. In the proposed research, a green chemistry synthesis process will be developed. The link between catalyst structure and performance will be systematically investigated with catalysts designed to test specific catalytic mechanisms. Structures of Pd-M hybridized with both perfect graphene and defect-rich graphene in place of granular activated carbon will be modeled to determine the optimal surface structures, charge transfer mechanisms, electronic properties, and energetic distributions. The kinetics of contaminant reduction by such catalysts will be systematically quantified and a practical but rigorous kinetic model will be developed to compare these types of catalysts across a broad range of conditions. The sensitivity of these catalysts to inactivation by known poisons of noble metal catalysts (e.g., sulfide and chloride) common in water treatment will be evaluated and considered in optimization of the catalyst designs. In addition to advancing the technology of water treatment by catalytic hydrogenation processes, this proposed research will contribute to the training of new researchers and practitioners in the field. The PIS will reach out to water service professionals through a series of planned workshops at Clackamas Community College, which has a strong training program for water treatment engineers. Outreach activities to the general public for the demonstration of the sustainable water treatment through collaboration with the Oregon Museum of Science & Industry, a local leader in informal education, are also planned. Furthermore, we are committed to recruiting minority and female graduate students to participate in this proposed research.