Intensification of Photocatalytic Membrane Processes

光催化膜过程的强化

• 批准号: RGPIN-2019-04117
• 负责人: Gomaa, Hassan
• 金额: $ 2.04万
• 依托单位: University of Western Ontario
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2021
• 资助国家: 加拿大
• 起止时间: 2021-01-01 至 2022-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=737420
• 关键词: Intensification; Photocatalytic; Membrane; Processes

With rapid depletion of energy and natural resources, there is need for developing sustainable processes that meet the challenges of increased consumer demands while protecting the environment and public safety. Photocatalysis is considered a sustainable technology that offers opportunities for harvesting the inexhaustible solar energy for use in many applications. These include, degradation of toxic pollutants, generation of H2, green synthesis of organic compounds, and more recently, emulsion separation, which can be very beneficial in treatment of complex waste streams contaminated with oil-water emulsions. Despite such potential advantages, competitive application of the technology is still limited by catalyst activity, reactor efficiency and product-catalyst separation. The main objective of this research program is to identify global intensification techniques to overcome these limitations and to allow for development of viable cost effective photocatalysis technologies for use in industrial and environmental applications. The proposed intensification approach will be based on a two pronged strategy. First, to intensify the reactor operation by coupling with advanced membrane separation, thus achieving synergy of simultaneous reaction and product recovery. The second is to intensify the catalytic reaction using efficient catalysts with enhanced visible light utilization, either suspended or immobilized on membranes. To overcome membrane fouling and enhance product and catalyst recovery, a novel hybrid oscillatory membrane system will be implemented. Use of oscillatory motion has proven effective in intensifying many processes, and its application in photocatalysis could present a novel approach for mitigating fouling problems and enhancing process efficiency. The development will involve exploring use of both pressure and thermal driven membrane separation such as pervaporation or membrane distillation which can provide several advantages in applications such as green synthesis and emulsion separation. It will also include investigating use of advanced membrane materials with enhanced surface and separation properties as well as membranes functionalized with efficient catalysts and/or nanoparticles. Modeling and optimization studies using analytical and experimental techniques will be done for use in design and scale up applications. Finally, the advantages of the developed system will be tested for applications including multi-pollutants degradation as well as demulsification and treatment of complex waste streams contaminated with oil-water emulsions. Achieving the above will provide knowledge needed to develop new generation of efficient photocatalytic membrane reactors (PMR) and could present a breakthrough in the industry by making PMR an economically viable option for environmental and industrial applications.

随着能源和自然资源的迅速枯竭，有必要开发可持续的工艺，以满足消费者需求增加的挑战，同时保护环境和公共安全。光催化被认为是一种可持续发展的技术，为收集取之不尽的太阳能用于许多应用提供了机会。这些包括有毒污染物的降解、H2的产生、有机化合物的绿色合成，以及最近的乳液分离，其在处理被油-水乳液污染的复杂废物流中可以是非常有益的。尽管有这些潜在的优势，该技术的竞争性应用仍然受到催化剂活性、反应器效率和产物-催化剂分离的限制。该研究计划的主要目标是确定全球强化技术，以克服这些限制，并允许开发可行的成本效益高的可再生能源技术，用于工业和环境应用。拟议的强化办法将以双管齐下的战略为基础。首先，通过与先进的膜分离耦合来强化反应器操作，从而实现同时反应和产物回收的协同效应。第二种是使用具有增强的可见光利用率的高效催化剂来强化催化反应，所述催化剂悬浮或固定在膜上。为了克服膜污染和提高产品和催化剂的回收率，将实施一种新型的混合振荡膜系统。使用振荡运动已被证明是有效的，在强化许多过程中，它的应用在炼油厂可以提出一种新的方法，以减轻污垢问题和提高过程效率。开发将涉及探索使用压力和热驱动的膜分离，如渗透蒸发或膜蒸馏，这可以在应用中提供几个优点，如绿色合成和乳液分离。它还将包括研究使用先进的膜材料，增强表面和分离性能，以及膜功能与有效的催化剂和/或纳米粒子。将使用分析和实验技术进行建模和优化研究，用于设计和放大应用。最后，将测试所开发的系统的优点，包括多污染物降解以及破乳和处理复杂的废水污染的油-水乳液的应用。实现上述目标将提供开发新一代高效光催化膜反应器（PMR）所需的知识，并通过使PMR成为环境和工业应用的经济可行的选择，在行业中实现突破。