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

1507707Jiao1508115Tratnyek 研究小组提议开发颗粒活性炭负载的双金属催化剂，该催化剂集物理吸附和催化分解能力于一体，以实现可持续的水处理。拟议项目的目标是设计和制造一类新型粒状活性炭负载的钯金属（双金属）催化剂，该催化剂可快速降解污染物，而不会积累有问题的副产品，也不会因天然水的常见成分而严重中毒（催化活性丧失）。该项目利用了钯（Pd）和钯基双金属催化剂催化加氢脱卤和加氢脱氧能够转化各类污染物的事实。为了将有机污染物转化为无害产品，本研究的重点是开发 Pd-M 双金属催化剂，其中 M 代表金 (Au)、铜 (Cu) 和铟 (In)，以实现卤代有机物、氧阴离子和亚硝胺等主要饮用水污染物的催化还原转化。 PI的初步结果表明，建议研究的催化剂类型可以非常快速地进行三氯乙烯的加氢脱卤以及其他模型污染物的加氢。在拟议的研究中，将开发绿色化学合成工艺。将使用旨在测试特定催化机制的催化剂来系统地研究催化剂结构和性能之间的联系。将模拟与完美石墨烯和富含缺陷石墨烯混合的 Pd-M 结构来代替颗粒活性炭，以确定最佳表面结构、电荷转移机制、电子特性和能量分布。此类催化剂减少污染物的动力学将被系统量化，并将开发实用但严格的动力学模型，以在广泛的条件下比较这些类型的催化剂。在优化催化剂设计时，将评估和考虑这些催化剂对水处理中常见的贵金属催化剂（例如硫化物和氯化物）的已知毒物失活的敏感性。除了通过催化加氢工艺推进水处理技术之外，这项拟议的研究还将有助于培训该领域的新研究人员和从业人员。 PIS 将通过在克拉克马斯社区学院举办的一系列计划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大的培训计划。还计划与俄勒冈州科学与工业博物馆（当地非正式教育领域的领导者）合作，向公众开展宣传活动，展示可持续水处理技术。此外，我们致力于招募少数民族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.