Jiangning Liu , Yin Che , Chen Wang , Weijiong Dai , Zhaoyang Fan , Xu Wu
{"title":"The opportunities and challenges for SCR-DeNOx facing coalbed methane power generation","authors":"Jiangning Liu , Yin Che , Chen Wang , Weijiong Dai , Zhaoyang Fan , Xu Wu","doi":"10.1016/j.jece.2024.114936","DOIUrl":"10.1016/j.jece.2024.114936","url":null,"abstract":"<div><div>Coalbed methane (CBM) is an important resource in the world, and CBM power generation is supposed as the most effective method to make utilization of the low-concentration methane. In this context, efficient nitrogen oxides (NO<sub>x</sub>) removal is of paramount importance, where the long-term stable operation of zeolite catalyst is significantly challenged under high temperature, high NO<sub>x</sub> concentration, high humidity, and high gas hourly space velocity conditions (abbreviated as ‘four high’). Herein, in view of the characteristics of exhaust gas, potential reactions that occurred including ammonia-selective catalytic reduction (NH<sub>3</sub>-SCR), hydrocarbon-selective catalytic reduction (HC-SCR), carbon monoxide-selective catalytic reduction (CO-SCR), the competitive oxidation reaction between CH<sub>4</sub> and CO are reviewed in detail, such as the catalysts, influencing factors and reaction mechanisms. Besides the excellent NO<sub>x</sub> conversion, anti-aging, anti-poisoning, and anti-sintering performance are essential in this field. Furthermore, preparing the low-cost zeolite derived from solid waste represents an efficient and promising integration the disposal of coal fly ash and coal gangue, as well as the removal of NO<sub>x</sub>. This review not only proposes the theoretical system and construction strategy of denitrification catalysts, but also contributes the theoretical basis for efficient NO<sub>x</sub> removal of the CBM power generation, and collaborative control of gas pollution in accordance with ‘treating exhaust with gas’ and ‘treating exhaust with coal’ guidelines.</div></div>","PeriodicalId":15759,"journal":{"name":"Journal of Environmental Chemical Engineering","volume":"12 6","pages":"Article 114936"},"PeriodicalIF":7.4,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142747780","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Hao-wen Zhu , Rui-tang Guo , Qing-shan Wang , Cong Liu , Heng-fei Cui , Ming-yang Liu , Wei-guo Pan
{"title":"Construction mechanisms, synthesis strategies, and photocatalytic applications of homojunction catalysts: A review","authors":"Hao-wen Zhu , Rui-tang Guo , Qing-shan Wang , Cong Liu , Heng-fei Cui , Ming-yang Liu , Wei-guo Pan","doi":"10.1016/j.jece.2024.114953","DOIUrl":"10.1016/j.jece.2024.114953","url":null,"abstract":"<div><div>With the increasing global concern for environmental issues and sustainable development, photocatalytic technology has significant promise in addressing environmental contamination and energy shortages. This technology utilizes renewable solar energy as an energy source and produces no harmful by-products. Notably, selecting suitable photocatalysts is the key to achieving efficient photocatalysis. Homojunction photocatalysts, consisting of elements with the same semiconductor material but different crystalline phases/exposed surfaces/dimensions, have garnered significant interest recently. The reason is that near-perfect lattice matching at the homojunction interface and continuous band bonding greatly facilitate photogenerated charge transport. Furthermore, the internal electric field in the homojunction well drives the migration and separation of photoinduced charge carriers, improving photocatalytic activity. Herein, this review summarizes the recent advances in homojunction photocatalysis, introduces the fundamentals of different homojunction photocatalysts, and focuses on the preparation methods of homojunction photocatalysts and their photocatalytic applications in energy production and environmental protection, such as reducing CO<sub>2</sub>, producing H<sub>2</sub>, fixing N<sub>2</sub>, and degrading pollutants.</div></div>","PeriodicalId":15759,"journal":{"name":"Journal of Environmental Chemical Engineering","volume":"12 6","pages":"Article 114953"},"PeriodicalIF":7.4,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142747781","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Role of 2D layered double hydroxide based heterostructures in preparation polymeric photocatalytic membrane for wastewater treatment","authors":"Payam Veisi , Arash Fattah-alhosseini , Mosab Kaseem","doi":"10.1016/j.jece.2024.114957","DOIUrl":"10.1016/j.jece.2024.114957","url":null,"abstract":"<div><div>The limitations of membrane filtration processes in water and wastewater treatment have led to the development of photocatalytic membranes. These membranes are produced by integrating photocatalytic and membrane filtration technologies. Developing photocatalytic membranes with anti-fouling and self-cleaning capabilities is essential for these applications. Utilizing photocatalysts with high photocatalytic activity and excellent hydrophilic properties is advantageous. Among various semiconductor photocatalytic materials, layered double hydroxides (LDHs) stand out due to their hydrophilicity, large surface area, adjustable interlayer spacing, and robust photocatalytic performance. However, limitations such as electron-hole recombination and low visible light absorption reduce the photocatalytic activity of LDHs. A common method to enhance the photocatalytic properties of LDHs is by forming heterostructures with other semiconductor materials. LDH-based heterostructures with improved photocatalytic properties are promising for enhancing photocatalytic membrane performance. This review comprehensively examines recent advancements in photocatalytic membranes modified with LDH-based heterostructures for water and wastewater treatment, offering a clear perspective for researchers in the field.</div></div>","PeriodicalId":15759,"journal":{"name":"Journal of Environmental Chemical Engineering","volume":"12 6","pages":"Article 114957"},"PeriodicalIF":7.4,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142747783","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Yang Liu , Shujuan Sun , Meng Ma , Hao Pan , Fengyu Gao , Xiubing Huang
{"title":"Recent advances in TiO2-based photocatalysts for CO2 reduction to methane","authors":"Yang Liu , Shujuan Sun , Meng Ma , Hao Pan , Fengyu Gao , Xiubing Huang","doi":"10.1016/j.jece.2024.114986","DOIUrl":"10.1016/j.jece.2024.114986","url":null,"abstract":"<div><div>Photocatalytic CO<sub>2</sub> reduction reaction (CO<sub>2</sub>RR) is one of the strategies to mitigate the greenhouse effect, in which the generation of CH<sub>4</sub> as a high-calorific-value clean energy source has attracted much attention. Among many photocatalysts, titanium dioxide (TiO<sub>2</sub>) is more attractive due to its controllable energy band structure and other advantages. However, its wide forbidden band leads to low light utilization and catalytic capacity. Therefore, tuning the energy band structure and absorbance range of TiO<sub>2</sub> to improve CO<sub>2</sub>RR efficiency has become a research focus. On the basis of few reviews on the research progress of photocatalytic CO<sub>2</sub>RR to CH<sub>4</sub> from TiO<sub>2</sub>-based composites, this paper firstly comprehends the principle and reaction pathway of photocatalytic CO<sub>2</sub>RR, and introduces the influence of the dosage of the main reactants (H<sub>2</sub>O and CO<sub>2</sub>) on the photocatalytic process, as well as the preparation method of the TiO<sub>2</sub>-based catalysts. Then the research progress of TiO<sub>2</sub>-based catalysts in the field of CO<sub>2</sub>RR to CH<sub>4</sub> photocatalysis (e.g., construction of TiO<sub>2</sub> heterojunction, surface modification, elemental doping, metal-organic frameworks (MOF)/TiO<sub>2</sub>, etc.) is reviewed, which provide guidance for the design of photocatalysts with excellent performance. Finally, challenges and research opportunities are discussed and outlooked.</div></div>","PeriodicalId":15759,"journal":{"name":"Journal of Environmental Chemical Engineering","volume":"12 6","pages":"Article 114986"},"PeriodicalIF":7.4,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142747718","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Aashutosh Dube , Shweta J. Malode , Mohammed Ali Alshehri , Nagaraj P. Shetti
{"title":"Electrochemical degradation of some toxic molecules- a concise review of recent studies","authors":"Aashutosh Dube , Shweta J. Malode , Mohammed Ali Alshehri , Nagaraj P. Shetti","doi":"10.1016/j.jece.2024.114916","DOIUrl":"10.1016/j.jece.2024.114916","url":null,"abstract":"<div><div>Electrochemical degradation is a sophisticated and environmentally sustainable method for treating hazardous substances in water and wastewater. This technique uses electrical energy to facilitate the oxidation and reduction of contaminants, converting them into less damaging or inert by-products. The approach is adaptable and proficient at degrading diverse contaminants, encompassing organic chemicals, heavy metals, and enduring pollutants such as pesticides and medicines. Principal advantages encompass elevated efficiency, enhanced controllability, and elimination of supplementary chemicals. Analytical methods, including High-Performance Liquid Chromatography (HPLC) and Gas Chromatography-Mass Spectrometry (GC-MS), are utilized to assess degradation rates, examine the degradation process, identify by-products, and confirm removal efficacy. Application of metal oxide nanoparticles, metal oxide-based carbon nanostructures, granular activated carbon (GAC) as cost-effective material, and MXene demonstrated significant removal efficiency when optimum analytical parameters such as pH, charge density, suitable electrolyte, and degradation time were employed. Self-cleaning electrodes, ultrasonic cleaning devices, or flow-through systems may mitigate the fouling problem in the analysis. Utilization of advanced materials such as boron-doped diamond (BDD) or titanium suboxide (TiSO) exhibits higher corrosion and degradation resistance. Employ protective coatings on electrodes to prevent direct exposure to aggressive pollutants, thereby prolonging the lifespan of the electrodes. Current research aims to enhance electrode materials, improve process efficiency to reduce initial costs and combine sustainable energy sources with electrochemical systems to minimise power consumption, positioning electrochemical degradation as a viable approach for sustainable environmental remediation.</div></div>","PeriodicalId":15759,"journal":{"name":"Journal of Environmental Chemical Engineering","volume":"12 6","pages":"Article 114916"},"PeriodicalIF":7.4,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142747782","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Darmansyah Darmansyah , Da-Wei Tsai , Yen-Kung Hsieh , Sheng-Jie You , Ya-Fen Wang
{"title":"Unraveling the role of bimetal oxide CuO/MnO2 on modified catalyst from solid waste incineration fly ash to enhance NOx removal","authors":"Darmansyah Darmansyah , Da-Wei Tsai , Yen-Kung Hsieh , Sheng-Jie You , Ya-Fen Wang","doi":"10.1016/j.jece.2024.114988","DOIUrl":"10.1016/j.jece.2024.114988","url":null,"abstract":"<div><div>A novel catalytic system employing a modified fly ash catalyst doped with bimetal oxides has been investigated for its efficacy in selective catalytic reduction (SCR) with ammonia (NH<sub>3</sub>) to reduce NO<sub>x</sub> pollutants. The study reveals the synergistic interaction between two activate agents, copper (Cu) and manganese (Mn), on fly ash (FA), achieving impressive NO<sub>x</sub> removal efficiency. The best-performing catalyst, FA/Cu/Mn-5, is composed of 90 % fly ash, 5 % copper, and 5 % manganese. It removes 98.5 % of NO<sub>x</sub> at 200°C. Copper oxide (CuO) helps speed the reaction by converting nitrogen monoxide (NO) into nitrogen dioxide (NO<sub>2</sub>), an important part of the SCR process. Manganese oxide (MnO<sub>2</sub>), an enhancer of oxygen availability, can promote NH<sub>3</sub> oxidation, effectively lowering the operational temperature and mitigating the formation of nitrous oxide (N<sub>2</sub>O). This contrasts with previous research, which reported significant N<sub>2</sub>O generation, a major greenhouse gas. Therefore, this current study offers a more sustainable approach to emission control. This study also highlights the critical role of reactive intermediates, such as NO<sub>2</sub>, in driving the SCR mechanism, underscoring the potential of modified fly ash catalysts to combat air pollution effectively.</div></div>","PeriodicalId":15759,"journal":{"name":"Journal of Environmental Chemical Engineering","volume":"13 1","pages":"Article 114988"},"PeriodicalIF":7.4,"publicationDate":"2024-11-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142759657","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Assessing the performance of adsorbents for CO2/CH4 separation in pressure swing adsorption units: A review","authors":"Luis Paz , Solène Gentil , Vanessa Fierro , Alain Celzard","doi":"10.1016/j.jece.2024.114870","DOIUrl":"10.1016/j.jece.2024.114870","url":null,"abstract":"<div><div>This review article assesses the performance of various adsorbents for CO<sub>2</sub>/CH<sub>4</sub> separation, a critical step in the final phase of a biogas upgrading plant. The focus is particularly on the use of pressure swing adsorption (PSA) units for this purpose. Four types of adsorbents, including activated carbons (ACs), carbon molecular sieves, metal organic frameworks, and zeolites, are thus evaluated based on their selectivity in CO<sub>2</sub>/CH<sub>4</sub> separation and PSA working capacity ratio. This selectivity is estimated from pure component isotherms through the Ideal Adsorbed Solution Theory (IAST), and the PSA working capacity ratio is evaluated for a PSA cycle with depressurization at atmospheric and sub-atmospheric pressure. The results show that ACs exhibit the lowest selectivity, while zeolites have the highest selectivity and PSA working capacity ratio. The article also includes a review of simulation studies on CO<sub>2</sub>/CH<sub>4</sub> separation by PSA. In addition, PSA units are compared based on their productivity, energy consumption, purity, and recovery. To calculate energy consumption and productivity, parameters that are often overlooked, a mass balance is applied to the PSA cycle described in each relevant literature study. Our study suggests that the PSA cycle with pressure equalization and sub-atmospheric pressure depressurization is the most optimal, providing valuable insights into the selection and optimization of adsorbents and PSA units for CO<sub>2</sub>/CH<sub>4</sub> separation.</div></div>","PeriodicalId":15759,"journal":{"name":"Journal of Environmental Chemical Engineering","volume":"12 6","pages":"Article 114870"},"PeriodicalIF":7.4,"publicationDate":"2024-11-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142721368","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Neha Sharma, Almeenu Rasheed, Nehaun Zargar, Sovik Das
{"title":"A critical review on mitigation strategies for per- and polyfluoroalkyl substances from water matrices with special emphasis on techno-economic and life cycle assessment: Current status, knowledge gaps, and future perspectives","authors":"Neha Sharma, Almeenu Rasheed, Nehaun Zargar, Sovik Das","doi":"10.1016/j.jece.2024.114863","DOIUrl":"10.1016/j.jece.2024.114863","url":null,"abstract":"<div><div>The widespread detection of per- and polyfluoroalkyl substances (PFAS) in aqueous environment has emerged as a global concern due to their persistent nature, high stability, and potential toxicity. Thus, in the recent decades, removal of PFAS from water matrices has garnered tremendous attention of researchers to combat this pervasive environmental threat and mitigate the risk imparted by these toxic compounds on living beings and the environment. In this context, this critical review elucidates different technologies based on their removal mechanisms, either separation or degradation, employed for the remediation of PFAS from water matrices. This review also emphasizes on techno-economic analysis (TEA) and life cycle assessment (LCA) of the discussed technologies for evaluating their practical feasibility before deploying them on the field for remediation of PFAS, which are generally overlooked while comparing different technologies. The strength-weakness-opportunity-threat (SWOT) analysis of discussed technologies is also presented in this article, with the aim to provide insight into underlying opportunities and challenges with these technologies, thus beneficial in electing the best technology for PFAS remediation. This paper also highlights the current challenges, limiting the application of these technologies at the field-scale that necessitate further efforts and can be further translated into plausible future research opportunities. In a nutshell, this paper intends to guide the researchers by presenting a systematic review of different technologies employed for PFAS remediation by critically comparing these technologies through SWOT analysis along with their LCA and TEA, enabling scientists to identify the most effective, sustainable, and economically feasible PFAS remediation technology.</div></div>","PeriodicalId":15759,"journal":{"name":"Journal of Environmental Chemical Engineering","volume":"12 6","pages":"Article 114863"},"PeriodicalIF":7.4,"publicationDate":"2024-11-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142706350","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Jinlan Xu , Rankang Zhou , Huiwen Guan , Chuanyu Liu , Jiayi Wang , Xin Zhai , Tingyu Chen
{"title":"Fenton oxidation remediation of petroleum-contaminated soil under high-quality development strategy: A review","authors":"Jinlan Xu , Rankang Zhou , Huiwen Guan , Chuanyu Liu , Jiayi Wang , Xin Zhai , Tingyu Chen","doi":"10.1016/j.jece.2024.114879","DOIUrl":"10.1016/j.jece.2024.114879","url":null,"abstract":"<div><div>The permeation of petroleum pollutants severely disrupts the soil ecology and poses a threat to human health. Although research on the Fenton oxidation technology for the remediation of petroleum-contaminated soil is relatively mature, in-depth exploration is still lacking against the backdrop of high-quality development strategies. This study obtained a knowledge map through visualization and co-occurrence analysis of keywords, revealing the temporal and spatial distribution, knowledge structure, and hot research trends, providing a new perspective for understanding the dynamics of the research field. This article compares liquid- and solid-phase iron-catalyzed Fenton oxidation technologies and finds that the solid-phase technology performs better in efficiently removing pollutants, reducing treatment time, lowering costs, and being more environmentally friendly, thereby highlighting its potential as a high-quality development strategy. Additionally, we delve into the key factors affecting the effectiveness of Fenton oxidation, such as the dosage of H<sub>2</sub>O<sub>2</sub>, pH, temperature, catalyst selection, and soil organic matter content, providing a scientific basis for the optimization of the technology. Finally, this study predicts the application prospects of the Fenton system in soil remediation and proposes forward-looking development directions, aiming to guide future research and practice, thereby promoting the innovation and application of Fenton oxidation technology in environmental remediation.</div></div>","PeriodicalId":15759,"journal":{"name":"Journal of Environmental Chemical Engineering","volume":"12 6","pages":"Article 114879"},"PeriodicalIF":7.4,"publicationDate":"2024-11-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142706349","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Recent advances in filter materials for efficient photodynamic inactivation of pathogens in the air","authors":"Yuxin Lin, Liyun Chen, Longguang Jiang, Mingdong Huang","doi":"10.1016/j.jece.2024.114877","DOIUrl":"10.1016/j.jece.2024.114877","url":null,"abstract":"<div><div>The global epidemic of COVID-19 has intensified the urgency for the development of high-efficiency air filters with antiviral and antibacterial properties. While conventional commercial air purifiers can filter particulate matter, they often fall short of eradicating airborne pathogens. Thus, there is a critical need to innovate air filtration systems capable of not just trapping but exterminating harmful microorganisms to impede their airborne transmission. One potential solution is to use antibacterial photodynamic technique (aPDT). Indeed, recent years have witnessed the rapid growth in this area. This review summaries applications of aPDT for air disinfection through the inactivation of bacteria, fungi, and viruses. In addition, the mechanisms of photosensitizer-assisted pathogen inactivation and the futher development in photodynamic air disinfection technique are also discussed.</div></div>","PeriodicalId":15759,"journal":{"name":"Journal of Environmental Chemical Engineering","volume":"12 6","pages":"Article 114877"},"PeriodicalIF":7.4,"publicationDate":"2024-11-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142706351","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}