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Processes
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Progress in Catalysis Technology in Clean Energy Utilization
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Progress in Catalysis Technology in Clean Energy Utilization

A special issue of Processes (ISSN 2227-9717). This special issue belongs to the section "Catalysis Enhanced Processes".

Deadline for manuscript submissions: closed (30 November 2024) | Viewed by 12493

Special Issue Editors

Prof. Dr. Xuesen Du

E-Mail Website
Guest Editor
School of Energy and Power Engineering, Chongqing University, Chongqing 400044, China
Interests: emission control; deNOx catalyst; plasma catalysis; water gas shift; H2 storage; N2 fixation
Special Issues, Collections and Topics in MDPI journals
Prof. Dr. Xiaojiang Yao

E-Mail Website
Guest Editor
Research Center for Atmospheric Environment, Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences, Chongqing 400714, China
Interests: air pollution control; environmental catalysis; DeNOx; catalytic combustion of VOCs; reaction mechanism
Dr. Peng Lu

E-Mail Website
Guest Editor
South China Institute of Environmental Sciences, The Ministry of Ecology and Environment of PRC, Guangzhou 510655, China
Interests: co-removal of NOx and VOCs; VOCs adsorption and catalytic oxidation; ozone catalytic decomposition; pyrolysis and gasification; solid waste utilization

Special Issue Information

Dear Colleagues,

The need to address global challenges such as the overconsumption of fossil fuels, environmental pollution and climate change has become increasingly urgent in recent decades. The world is now in desperate need of more clean and sustainable energy. Catalysis plays an indispensable role in developing clean energy technologies, including water splitting, CO2 reduction, N2 fixation, H2 fuel cells and catalytic abatement of air pollutants such as NOx, volatile organic compounds (VOCs), soot and CO. Researchers have reported exciting advances in energy and environmentally related catalysis.

This Special Issue seeks contributions on this topic including basic and applied research, modelling and simulation and system analysis studies related to catalysis for clean energy production, conversion and utilizations. Papers related to catalytic abatement of gas pollutants generated during energy utilization will be also included. We welcome researchers to submit both original research articles and review papers for this Special Issue. Topics of interest include, but are not limited to, the following:

  • Catalysis for H2 production, storage and utilization;
  • Catalysis for renewable and clean energy conversions;
  • Catalysis for carbon dioxide conversion and N2 fixation;
  • Abatement of air pollutants including NOx, CO, CO2, soot and VOCs using catalysis and sorption methods.

Prof. Dr. Xuesen Du
Prof. Dr. Xiaojiang Yao
Dr. Peng Lu
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Processes is an international peer-reviewed open access monthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2400 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • clean energy
  • sustainable energy
  • catalysis
  • pollution control
  • environmental catalysis
  • catalyst characterization
  • reaction mechanism

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Published Papers (4 papers)

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Research

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16 pages, 3429 KiB  
Article
Effect of Ba Addition on the Catalytic Performance of NiO/CeO2 Catalysts for Methane Combustion
by Xiuhui Huang, Wenkai Yang and Junfeng Li
Processes 2024, 12(8), 1630; https://doi.org/10.3390/pr12081630 - 2 Aug 2024
Cited by 1 | Viewed by 1408
Abstract
Methane catalytic combustion, a method for efficient methane utilization, features high energy efficiency and low emissions. The key to this process is the development of highly active and stable catalysts. This study involved the synthesis of a range of catalysts, including NiO/CeO2 [...] Read more.
Methane catalytic combustion, a method for efficient methane utilization, features high energy efficiency and low emissions. The key to this process is the development of highly active and stable catalysts. This study involved the synthesis of a range of catalysts, including NiO/CeO2, NiO–M/CeO2, and NiO-Ba/CeO2. In order to modify the NiO/CeO2 catalysts to improve their catalytic activity, various alkaline earth metal ions were introduced, and the catalysts were characterized to evaluate the impact of different alkaline earth metal ion doping. It was found that the introduction of Ba as a dopant yielded the highest catalytic activity among the dopants tested. Based on this, the influence of the impregnation sequence, the Ba loading amount, and other factors on the catalytic activity of the NiO/CeO2 catalysts doped with Ba were investigated, and comprehensive characterization was conducted using a variety of analytical techniques, including N2 adsorption/desorption, X-ray diffraction, Fourier transform infrared, hydrogen temperature-programmed reduction, methane temperature-programmed surface reaction, and oxygen temperature-programmed oxidation. The H2–TPR characterization results suggest that Ba introduction partially enhances the reducing property of NiO/CeO2 catalysts, and improves the surface oxygen activity in the catalysts. Meanwhile, the CH4–TPSR and O2–TPO results indicate that Ba introduction also boosts the bulk-phase oxygen liquidity in the catalysts, renders the migration of bulk-phase oxygen to surface oxygen, and increases the surface oxygen number in the catalysts. These results provide evidence of the effectiveness of this catalyst in methane catalytic combustion. Full article
(This article belongs to the Special Issue Progress in Catalysis Technology in Clean Energy Utilization)
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13 pages, 2273 KiB  
Article
Application of Deep Learning Algorithm in Optimization Control of Electrostatic Precipitator in Coal-Fired Power Plants
by Jianjun Zhu, Chao Feng, Zhongyang Zhao, Haoming Yang and Yujie Liu
Processes 2024, 12(3), 477; https://doi.org/10.3390/pr12030477 - 27 Feb 2024
Cited by 2 | Viewed by 1329
Abstract
The new energy structure needs to balance energy security and dual carbon goals, which has brought major challenges to coal-fired power plants. The pollution reduction and carbon emissions reduction in coal-fired power plants will be a key task in the future. In this [...] Read more.
The new energy structure needs to balance energy security and dual carbon goals, which has brought major challenges to coal-fired power plants. The pollution reduction and carbon emissions reduction in coal-fired power plants will be a key task in the future. In this paper, an optimization technique for the operation of an electrostatic precipitator is proposed. Firstly, the voltage-current model is constructed based on the modified dust charging mechanism; the modified parameters are trained through the gradient descent method. Then, the outlet dust concentration prediction model is constructed by coupling the mechanism model with the data model; the data model adopts the long short-term memory network and the attention mechanism. Finally, the particle swarm optimization algorithm is used to achieve the optimal energy consumption while ensuring stable outlet dust concentration. By training with historical data collected on site, accurate predictions of the secondary current and outlet dust concentration of the electrostatic precipitator have been achieved. The mean absolute percentage error of the voltage-current characteristic model is 1.43%, and the relative root mean-squared error is 2%. The mean absolute percentage error of the outlet dust concentration prediction model on the testing set is 5.2%, and the relative root mean-squared error is 6.9%. The optimization experiment is carried out in a 330 MW coal-fired power plant. The results show that the fluctuation of the outlet dust concentration is more stable, and the energy saving is about 43% after optimization; according to the annual operation of 300 days, the annual average carbon reduction is approximately 2621.34 tons. This method is effective and can be applied widely. Full article
(This article belongs to the Special Issue Progress in Catalysis Technology in Clean Energy Utilization)
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12 pages, 2649 KiB  
Article
Experimental Research on Deep Silicon Removal in Spent SCR Catalysts
by Weihong Wu, Li Wang, You Zhang, Zhesheng Hua, Hao Song, Shaojun Liu, Sihui Song, Dingzhen Wang and Xiang Gao
Processes 2024, 12(2), 290; https://doi.org/10.3390/pr12020290 - 29 Jan 2024
Viewed by 1421
Abstract
In this research, hydrofluoric acid (HF) was used as a leaching agent to remove silicon impurities from titanium dioxide powder regenerated from a spent SCR catalyst. Further, the effects of HF concentration, liquid–solid ratio, leaching temperature, and leaching time on the leaching rate [...] Read more.
In this research, hydrofluoric acid (HF) was used as a leaching agent to remove silicon impurities from titanium dioxide powder regenerated from a spent SCR catalyst. Further, the effects of HF concentration, liquid–solid ratio, leaching temperature, and leaching time on the leaching rate of regenerated titanium dioxide powder were investigated. The results revealed that the leaching rate of silicon in alkali-leached samples could reach 99.47% under the following conditions: 4% HF concentration, a leaching temperature of 50 °C, and a liquid–solid ratio of 5:1. When compared under identical experimental conditions, the silicon leaching rate in the alkali leached sample using HF surpassed that of the spent SCR catalyst. This suggests that high-temperature alkali leaching led to the degradation of the catalyst and the glass fiber within it, rendering this process more favorable for silicon leaching. Full article
(This article belongs to the Special Issue Progress in Catalysis Technology in Clean Energy Utilization)
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Review

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19 pages, 1010 KiB  
Review
Current Status and Economic Analysis of Green Hydrogen Energy Industry Chain
by Xinrong Yan, Wenguang Zheng, Yajuan Wei and Zhaoqian Yan
Processes 2024, 12(2), 315; https://doi.org/10.3390/pr12020315 - 1 Feb 2024
Cited by 17 | Viewed by 7703
Abstract
Under the background of the power system profoundly reforming, hydrogen energy from renewable energy, as an important carrier for constructing a clean, low-carbon, safe and efficient energy system, is a necessary way to realize the objectives of carbon peaking and carbon neutrality. As [...] Read more.
Under the background of the power system profoundly reforming, hydrogen energy from renewable energy, as an important carrier for constructing a clean, low-carbon, safe and efficient energy system, is a necessary way to realize the objectives of carbon peaking and carbon neutrality. As a strategic energy source, hydrogen plays a significant role in accelerating the clean energy transition and promoting renewable energy. However, the cost and technology are the two main constraints to green hydrogen energy development. Herein, the technological development status and economy of the whole industrial chain for green hydrogen energy “production-storage-transportation-use” are discussed and reviewed. After analysis, the electricity price and equipment cost are key factors to limiting the development of alkaline and proton exchange membrane hydrogen production technology; the quantity, scale and distance of transportation are key to controlling the costs of hydrogen storage and transportation. The application of hydrogen energy is mainly concentrated in the traditional industries. With the gradual upgrading and progress of the top-level design and technology, the application of hydrogen energy mainly including traffic transportation, industrial engineering, energy storage, power to gas and microgrid will show a diversified development trend. And the bottleneck problems and development trends of the hydrogen energy industry chain are also summarized and viewed. Full article
(This article belongs to the Special Issue Progress in Catalysis Technology in Clean Energy Utilization)
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