VOC emission control using novel adsorbents and their regeneration

使用新型吸附剂及其再生来控制 VOC 排放

• 批准号: RGPIN-2018-06306
• 负责人: Hashisho, Zaher
• 金额: $ 7.58万
• 依托单位: University of Alberta
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2022
• 资助国家: 加拿大
• 起止时间: 2022-01-01 至 2023-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=749060
• 关键词: VOC; emission; control; using; novel

About 2.16 megatonnes of volatile organic compounds (VOCs) were emitted to the atmosphere in Canada in 2014. Major sources of these emissions include the oil and gas industry (34%) and processes using organic solvents (15%). VOCs are precursors to ground-level ozone and many VOCs may be carcinogenic and/or neurotoxic. Therefore, technologies need to be developed to efficiently control these emissions, at lower cost. Technologies need also to foster sustainable development through promoting recycling and reusing whenever feasible. Adsorbents are material with large surface area and porosity which help them selectively remove impurities (adsorbate) from gas streams in a process called adsorption. Desorption is the reverse of adsorption (i.e. release of adsorbate from the adsorbent). Adsorption is typically followed by regeneration to clean the adsorbent by desorbing the adsorbate. Adsorption with regeneration (or desorption) is a desirable technique for air pollution control, particularly for VOCs capture, typically emitted from solvent-based processes. Adsorption with regeneration is also used for gas separation and purification as a replacement to the more energy intensive cryogenic distillation in separation of hydrocarbons or to amine absorption. Metal Organic Framework (MOF) is a class of adsorbents with extremely high surface area, high porosity and tunable pore sizes, that can be readily used for adsorptive separation and pollution control processes.To enhance VOC emissions control, previous research focused on improving the adsorption properties of adsorbents. However, little or no research has been conducted to enhance the regeneration properties of adsorbents including reducing the energy consumption during the regeneration process. New regeneration techniques such as microwave and resistive heating regeneration have emerged as more effective techniques compared to traditional regeneration with steam or hot inert gas due to their higher energy efficiency and desorption effectiveness. Hence, there is a need for better understanding of how the electric and dielectric properties of MOF and adsorbates affect resistive and microwave heating regeneration, respectively. The objectives of this research are: 1) Understand the impact of MOF's metal cluster on its electric and dielectric properties; 2) Regenerate MOFs using resistive heating; 3) Regenerate MOFs using microwave heating; and 4) Monitor MOFs loading using a non-contact microwave sensor.This research will contribute to sustainable development in Canada by improving the air quality through more effective capture of air pollutants emissions, lower energy consumption, and lower greenhouse gas emissions. It will also contribute to the training of high quality personnel in areas of strategic importance to Canada to improve industrial activities without compromising the quality of the environment.

2014年，大约2.16兆雄的有机化合物（VOC）发射到加拿大的大气中。这些排放的主要来源包括石油和天然气行业（34％）和使用有机溶剂的过程（15％）。 VOC是地面臭氧的前体，许多VOC可能具有致癌性和/或神经毒性。因此，需要开发技术以较低的成本有效地控制这些排放。技术还需要通过在可行的情况下促进回收和重复利用来促进可持续发展。吸附剂是具有较大表面积和孔隙率的材料，可帮助他们在称为吸附的过程中从气流中选择性地去除杂质（吸附物）。解吸是吸附的相反（即从吸附剂中释放吸附物）。吸附通常是再生，以通过吸附物来清洁吸附剂。使用再生（或解吸）吸附是空气污染控制的理想技术，特别是对于VOC捕获，通常是由基于溶剂的过程散发出来的。与再生的吸附还用于气体分离和纯化，以替代碳氢化合物分离或吸收胺的更强烈的低温蒸馏。金属有机框架（MOF）是一类吸附剂，具有极高的表面积，高孔隙率和可调孔尺寸，可以很容易地用于吸附性分离和污染控制过程。吸附剂的特性。但是，几乎没有进行研究以增强吸附剂的再生特性，包括减少再生过程中的能耗。与传统的蒸汽或热惰性气体相比，由于其较高的能源效率和吸附有效性，诸如微波炉和电阻加热再生等新的再生技术已经成为更有效的技术。因此，需要更好地理解MOF和吸附物的电和介电性能分别如何影响电阻性和微波加热再生。这项研究的目标是：1）了解MOF金属簇对其电介质和介电特性的影响； 2）使用电阻加热再生MOF； 3）使用微波加热再生MOF； 4）使用非接触微波传感器监测MOF的加载。这项研究将通过更有效地捕获空气污染物排放，较低的能源消耗和较低温室气体排放来改善空气质量，从而有助于加拿大的可持续发展。它还将为加拿大战略重要性的高质量人员培训，以改善工业活动，而不会损害环境的质量。