Combined Catalytic Conversion of NOx and VOCs: Present Status and Prospects DOI Open Access
Mengzhao Li, Rui Wang

Materials, Год журнала: 2024, Номер 18(1), С. 39 - 39

Опубликована: Дек. 25, 2024

This article presents a comprehensive examination of the combined catalytic conversion technology for nitrogen oxides (NOx) and volatile organic compounds (VOCs), which are primary factors contributing to formation photochemical smog, ozone, PM2.5. These pollutants present significant threat air quality human health. The examines reaction mechanism interaction between photocatalytic NH3-SCR oxidation technology, highlighting limitations existing techniques, including catalyst deactivation, selectivity issues, regeneration methods, environmental impacts catalysts. Furthermore, anticipates prospective avenues research, underscoring necessity development bifunctional catalysts capable concurrently transforming NOx VOCs across broad temperature spectrum. review encompasses multitude integrated selective reduction (SCR), oxidation, low-temperature plasma biological purification technology. highlights further research into design principles, structure–activity relationships, performance evaluations in real industrial environments. is required develop more efficient, economical, environmentally friendly waste gas treatment technologies. concludes by outlining importance collaborative management strategies VOC emissions potential achieving these goals.

Язык: Английский

Catalytic oxidation and mixed oxidation of ethyl acetate: A review DOI

Haopeng Tang,

Shilin Wu, Ling Ding

и другие.

Separation and Purification Technology, Год журнала: 2024, Номер 343, С. 126980 - 126980

Опубликована: Март 4, 2024

Язык: Английский

Процитировано

8

Directional deep oxidation of toluene via phenolized pathway—A review concerning dominant factors involved in photocatalysis DOI
Mingxia Lu,

Jinmin Wu,

Yan Luo

и другие.

Frontiers of Environmental Science & Engineering, Год журнала: 2025, Номер 19(2)

Опубликована: Янв. 2, 2025

Язык: Английский

Процитировано

1

Contribution and Mechanisms of BVOCs Emitted From a Typical Large Lake With Algal Bloom to O3 Levels in Lakeside Urban Areas DOI Creative Commons
Min Shao,

Yajing Wei,

Shun Lv

и другие.

Journal of Geophysical Research Atmospheres, Год журнала: 2025, Номер 130(4)

Опубликована: Фев. 24, 2025

Abstract Lakes near developed cities often experience algal blooms due to eutrophication, leading odor and biogenic emissions that can potentially interfere with the formation of air pollutants such as O 3 around these lakes. However, impact its pathways remain poorly understood. This study investigates contributions volatile organic compound (BVOC) from Lake Taihu in surrounding regions using a numerical approach. Composite analysis, case studies, process analysis reveal BVOC increase hourly near‐surface concentrations, maximum rise 25.5 μg m −3 , improving model performance. The influence lake is large on northwest side Taihu, primarily determined by spatial emission patterns dominant wind fields. development planetary boundary layer, particularly thermal internal enhanced breeze play important roles increasing levels over land, whereas variations temperature minor role. Vertical cross‐sections show interactions between land‐lake breezes background fields are critical for transport, surface concentrations areas. Additionally, intensify both daytime nighttime gas‐phase chemical consuming nitrates producing additional within lower troposphere. highlights importance local circulations pollution, emphasizing need comprehensive pollution control strategies lakeside cities.

Язык: Английский

Процитировано

0

Volatile Organic Compounds Emission Characteristics and Factors from Stage-Dependent Combustion in Typical Biomass Stoves in Northern China: Field Measurements and Environmental Implications DOI
Ke Yue,

Yulong Yan,

Zhen Li

и другие.

Environmental Pollution, Год журнала: 2025, Номер unknown, С. 126008 - 126008

Опубликована: Март 1, 2025

Язык: Английский

Процитировано

0

Constructing CuO/Co3O4 Catalysts with Abundant Oxygen Vacancies to Achieve the Efficient Catalytic Oxidation of Ethyl Acetate DOI Open Access

Jinlong Wen,

Ziying Hu, Hongpeng Jia

и другие.

Catalysts, Год журнала: 2025, Номер 15(6), С. 538 - 538

Опубликована: Май 28, 2025

The construction of multicomponent transition metal oxide catalysts can effectively increase the surface defects catalysts, and bring a synergistic effect from different components, thus enhancing generation reactive oxygen species improving catalytic activity for volatile organic compounds (VOCs) oxidation. In this article, CuO/Co3O4 with abundant vacancies degradation ethyl acetate was prepared by simple impregnation method. ratio Co/Cu on redox capacity, vacancy, active oxidation were studied. 90% conversion mineralization temperatures optimal catalyst Co3O4-20Cu are 211 214 °C (WHSV = 60,000 mL/(g·h), 1000 ppm acetate), which also shows good stability excellent water vapor resistance. Compared pure Co3O4, have more vacancies, provide species, allowing better low-temperature reduction. Through in situ DRIFTS study, intermediates decomposition analyzed, then possible mechanism proposed. addition, we Co3O4-20Cu/cordierite monolithic basis Co3O4-20Cu, exhibiting acetate.

Язык: Английский

Процитировано

0

Evidence for sustainably reducing secondary pollutants in a typical industrial city in China: Co-benefit from controlling sources with high reduction potential beyond industrial process DOI

Yueyuan Niu,

Yulong Yan,

Jiaqi Dong

и другие.

Journal of Hazardous Materials, Год журнала: 2024, Номер 478, С. 135556 - 135556

Опубликована: Авг. 22, 2024

Язык: Английский

Процитировано

2

Volatile organic compounds in typical coal chemical industrial park in China and their environmental and health impacts DOI
Jieting Zhou, Gao Min, Hongmei Xu

и другие.

Atmospheric Environment, Год журнала: 2024, Номер unknown, С. 120825 - 120825

Опубликована: Сен. 1, 2024

Язык: Английский

Процитировано

1

Characterization of Voc Emissions from a Typical Coal Chemical Industrial Park in China: Implication of Environmental and Health Impacts DOI
Jieting Zhou, Gao Min,

Hongmei Xu

и другие.

Опубликована: Янв. 1, 2024

The coal chemical industry produces a large amount of volatile organic compounds (VOCs), and the emission characteristics associated impact on environment health residents are still unclear. This study determined VOC concentrations compositions in Jinjie Coal Chemical Industry Park which is located northern China. average total measured VOCs (TVOCs) industrial areas summer winter were 231.5 103.2 μg/m3, higher than those residential (123.7 70.3 μg/m3), respectively. Aromatics, carbonyls, alkanes dominant classes areas, while halocarbons, alkenes had where not only affected by emissions also other anthropogenic sources. Formaldehyde, ethylene, m/p-xylene prevailing contributors to ozone formation potential (OFP), aromatics (e.g., m/p-xylene, o-xylene, ethylbenzene) showed largest contribution secondary aerosol (SOA) both seasons. Using source apportionment method, gasoline production, coking emission, fuel combustion, solvent coating, vehicle exhaust five major areas. With reliable estimations aspects, exposures acrolein formaldehyde posed highest non-carcinogenic carcinogenic risks, results demonstrated that substantial environmental co-benefits could be achieved reducing from process, diesel-fueled vehicles Park. Prioritizing establishment efficient air pollution measures tightening standards, especially for hazardous VOCs, recommended according findings valuable work.

Язык: Английский

Процитировано

0

EcoAI Forecast: Multi - Model Air Quality Prediction in Patancheru DOI

I. Karthikeyan,

A Jenefa,

Edward Naveen

и другие.

Опубликована: Апрель 17, 2024

In the face of escalating air pollution in Patancheru, Hyderabad, 'EcoAI Forecast' project presents a pioneering approach. It transcends limitations traditional linear models, which fail to effectively map intricacies quality fluctuations. This research introduces comprehensive multi-model machine learning framework, integrating sophisticated algorithms like LSTM (Long Short-Term Memory), GRU (Gated Recurrent Unit), CNN (Convolutional Neural Network), and an Ensemble model. These models are adept at processing complex environmental datasets, particularly focusing on nuanced prediction PM2.5 levels, crucial pollutant. Utilizing dataset enriched with hourly measurements, study illustrates paradigm shift from conventional methodologies more dynamic, data-driven techniques. The model, centerpiece this research, demonstrates exceptional performance, achieving RMSE (Root Mean Square Error) 0.068 R2 (Coefficient Determination) 0.945. metrics not only signify substantial improvement over but also underscore model's precision forecasting quality. success paves way for future advancements monitoring, exemplifying transformative potential advanced techniques urban public health preservation.

Язык: Английский

Процитировано

0

Spatial–Temporal Characteristics, Source Apportionment, and Health Risks of Atmospheric Volatile Organic Compounds in China: A Comprehensive Review DOI Creative Commons

Yangbing Wei,

Xuexue Jing, Yaping Chen

и другие.

Toxics, Год журнала: 2024, Номер 12(11), С. 787 - 787

Опубликована: Окт. 29, 2024

Volatile organic compounds (VOCs) are ubiquitous in the atmosphere, posing significant adverse impacts on air quality and human health. However, current research atmospheric VOCs mainly focuses specific regions or industries, without comprehensive national-level analysis. In this study, a total of 99 articles China published from 2015 to 2024 were screened, data their concentrations, source apportionment, health risks extracted summarized. The results revealed that annual average concentrations TVOCs groups generally increased then decreased between 2011 2022, peaking 2018-2019. A distinct seasonal pattern was observed, with highest occurring winter, followed by autumn, spring, summer. TVOC emissions highly concentrated northern eastern China, contributed alkanes alkenes. Source apportionment indicated vehicle sources (32.9% ± 14.3%), industrial (18.0% 12.8%), other combustion (13.0% 13.0%) primary China. There positive correlation (

Язык: Английский

Процитировано

0