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

一组研究人员提出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种新型颗粒活性炭负载的钯金属（双金属）催化剂，这种催化剂可以快速降解污染物，而不会积累有问题的副产物，也不会因天然水的常见成分而中毒（失去催化活性）。本项目利用钯（Pd）和钯基双金属催化剂催化加氢脱卤和加氢脱氧能够将各类有机污染物转化为无害化产物的特点，重点开发钯-M双金属催化剂，其中M代表金（Au）、铜（Cu）和铟（In），实现对卤化有机物、氧离子、和亚硝胺。PIs的初步结果表明，所研究的催化剂类型可以产生非常快速的三氯乙烯加氢脱卤以及其他模型污染物的加氢。在本研究中，将开发一种绿色化学合成工艺。催化剂结构和性能之间的联系将被系统地研究与催化剂设计测试特定的催化机制。将对Pd-M与完美石墨烯和富缺陷石墨烯混合的结构进行建模，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。这种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。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）的已知毒性失活的敏感性将在催化剂设计的优化中进行评估和考虑。除了推进催化加氢工艺的水处理技术外，这项拟议的研究将有助于培训该领域的新研究人员和实践者。PIS将在克拉克马斯社区学院（Clackamas Community College）举办一系列计划中的研讨会，以接触水务专业人员。克拉克马斯社区学院为水处理工程师提供了强有力的培训项目。还计划与俄勒冈州科学与工业博物馆合作，向公众展示可持续水处理的推广活动，俄勒冈州科学与工业博物馆是当地非正式教育的领导者。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.