Elemental Mercury Removal from Natural Gas Using Nano-Tio2

Journal of Chemistry and Environment Pub Date : 2023-06-10 DOI:10.56946/jce.v2i01.147

M. Mandor

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Abstract

The study focused on the utilization of titanium dioxide (TiO2) as a photo-catalyst for the treatment of natural gas contaminated with elemental mercury (Hg0). The catalyst was carefully characterized using various physical techniques, including transmission electron microscopy (TEM), energy dispersive X-ray analysis (EDAX), UV-visible diffuse reflectance spectroscopy (DRS), Brunauer-Emmett-Teller (BET), X-ray photoelectron spectroscopy (XPS) , and X-ray diffraction analysis (XRD). The results clearly demonstrated that TiO2 exhibited outstanding efficacy in oxidizing Hg0 when exposed to UV light. This phenomenon was ascribed to the excitation of photoelectrons within the valence band, leading to their transfer to the conduction band, generating photo-induced electrons that acted as reactive agents responsible for converting Hg0 into HgO. Notably, the activity of TiO2 under UV-visible light was significantly lower compared to TiO2 under UV light. The overall findings indicated that TiO2 under UV light exhibited the highest removal capacity, measured at 31.74 µg/g, followed by TiO2 under UV-visible light at 25.91 µg/g, and TiO2 in the dark at 20.89 µg/g. The study underscores the promising potential of TiO2 photo-catalyst for effectively eliminating Hg0 contamination in natural gas.

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纳米二氧化钛去除天然气中的单质汞

研究了利用二氧化钛(TiO2)作为光催化剂处理受单质汞(Hg0)污染的天然气。采用各种物理技术对催化剂进行了仔细的表征，包括透射电子显微镜(TEM)、能量色散x射线分析(EDAX)、紫外-可见漫反射光谱(DRS)、布鲁诺尔-埃米特-泰勒(BET)、x射线光电子能谱(XPS)和x射线衍射分析(XRD)。结果清楚地表明，TiO2在紫外光照射下表现出优异的氧化Hg0的功效。这一现象归因于价带内光电子的激发，导致它们转移到导带，产生光致电子，作为反应剂负责将Hg0转化为HgO。值得注意的是，TiO2在UV-可见光下的活性明显低于紫外光下的活性。结果表明，紫外光下TiO2的去除率最高，为31.74µg/g，其次是紫外可见光下的去除率为25.91µg/g，黑暗下的去除率为20.89µg/g。该研究强调了TiO2光催化剂在有效消除天然气中Hg0污染方面的巨大潜力。

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Journal of Chemistry and Environment Chemistry and Environmental Sciences-

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期刊介绍： Journal of Chemistry and Environment (ISSN: 2959-0132) is a peer-reviewed, open-access international journal that publishes original research and reviews in the fields of chemistry and protecting our environment for the future in an ongoing way. Our central goal is to provide a hub for researchers working across all subjects to present their discoveries, and to be a forum for the discussion of the important issues in the field. All scales of studies and analysis, from impactful fundamental advances in chemistry to interdisciplinary research across physical chemistry, organic chemistry, inorganic chemistry, biochemistry, chemical engineering, and environmental chemistry disciplines are welcomed. All manuscripts must be prepared in English and are subject to a rigorous and fair peer-review process. Accepted papers will appear online within 3 weeks followed by printed hard copies. Note: There are no Article Publication Charges. (100% waived). Welcome to submit your Mini reviews, full reviews, and research articles. Journal of Chemistry and Environment aims to publish high-quality research in the following areas: (Topics include, but are not limited to, the following) • Physical, organic, inorganic & analytical chemistry • Biochemistry & medicinal chemistry • Environmental chemistry & environmental impacts of energy technologies • Chemical physics, material & computational chemistry • Catalysis, electrocatalysis & photocatalysis • Energy, fuel cells & batteries Journal of Chemistry and Environment publishes: • Full papers • Reviews • Minireviews