{"title":"Direct air capture of CO2: an industrial perspective","authors":"Tim M Nisbet, Alexander W van der Made","doi":"10.1016/j.coche.2025.101190","DOIUrl":"10.1016/j.coche.2025.101190","url":null,"abstract":"<div><div>Direct air capture (DAC) is a crucial carbon dioxide removal (CDR) technology for achieving net-zero emissions by balancing atmospheric CO₂ release with removal. It serves two key roles: (a) when integrated with Carbon Capture and Storage (DAC-CCS), it enables permanent CO₂ removal to offset emissions from hard-to-abate sources like aviation; and (b) when combined with Carbon Capture and Utilization (DAC-CCU), it provides non-fossil CO₂ for producing defossilized fuels and zero-carbon chemicals. To fulfill these roles, DAC systems must be scalable and economically viable. While academic studies often focus on assessing sorbent performance under a limited range of weather conditions and for limited periods, we advocate that industrial scale deployment demands DAC systems with additional key features such as low pressure drop, high reliability for long periods (years) in a wide range of weather conditions (temperature, relative humidity), resistance to fouling from particulates in air, and without loss of performance by reingestion of CO2 depleted air. These key features are more commonly addressed in patent literature by companies nearing commercialization rather than in academic publications. Moreover, DAC technologies must be capital-efficient, and use low-cost, recyclable sorbents.</div></div>","PeriodicalId":292,"journal":{"name":"Current Opinion in Chemical Engineering","volume":"50 ","pages":"Article 101190"},"PeriodicalIF":6.8,"publicationDate":"2025-10-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145263086","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}
Jacob W Toney , Aaron G Garrison , Weiliang Luo , Roland G St. Michel , Sukrit Mukhopadhyay , Heather J Kulik
{"title":"Exploring beyond experiment: generating high-quality datasets of transition metal complexes with quantum chemistry and machine learning","authors":"Jacob W Toney , Aaron G Garrison , Weiliang Luo , Roland G St. Michel , Sukrit Mukhopadhyay , Heather J Kulik","doi":"10.1016/j.coche.2025.101189","DOIUrl":"10.1016/j.coche.2025.101189","url":null,"abstract":"<div><div>Machine learning (ML) approaches enable screening of the vast chemical space of transition metal complexes (TMCs) at faster speeds than either experimental approaches or <em>ab initio</em> calculations, but their quality is highly dependent on the reference data used. Existing TMC datasets often leverage experimental structures, which biases methods trained on this data away from reactive configurations. Calculating properties of these TMCs also introduces challenges of spin and oxidation state assignment. Recent work on generating hypothetical TMCs with realistic connectivity and geometry has demonstrated promise to extend datasets beyond experimental structures, especially when combined with ML approaches to identify complexes with desirable properties. Experimental measurements would be ideal to train and/or test these models but are often scarce for TMCs, especially for those that are catalytically active. Thus, properties calculated with electronic structure theory are a popular alternative choice for training ML models. However, TMCs are challenging for many conventional electronic structure methods, and few benchmark datasets exist to assess which methods are most reliable and cost-effective. Many of the recommended methods are computationally demanding, leading to the use of neural network potentials as surrogate models for large-scale screening. By utilizing emerging tools for TMC structure generation and suitable electronic structure methods, increasingly high-quality datasets will be curated to enhance the predictive power of ML approaches to discover novel TMCs, including in the development of neural network potentials. By more accurately predicting TMC properties, promising and practical candidates for catalysis, photosensitizers, molecular devices, and medicine will be identified.</div></div>","PeriodicalId":292,"journal":{"name":"Current Opinion in Chemical Engineering","volume":"50 ","pages":"Article 101189"},"PeriodicalIF":6.8,"publicationDate":"2025-10-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145217613","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}
Maoyuan Liao , Leilei Xiang , Yu Wang , Yuhao Fu , Jean D Harindintwali , Xin Jiang , Martin Elsner , Matthias C Rillig , Fang Wang
{"title":"Microplastics and antibiotics in agricultural soil: mechanisms and implications of co-contamination","authors":"Maoyuan Liao , Leilei Xiang , Yu Wang , Yuhao Fu , Jean D Harindintwali , Xin Jiang , Martin Elsner , Matthias C Rillig , Fang Wang","doi":"10.1016/j.coche.2025.101181","DOIUrl":"10.1016/j.coche.2025.101181","url":null,"abstract":"<div><div>The co-contamination of agricultural soils by microplastics (MPs), antibiotics, and antibiotic resistance genes (ARGs) is an emerging environmental concern with significant ecological and public health implications. This review explores the sources, interactions, and consequences of MPs and antibiotics/ARGs co-occurrence in soil systems. Agricultural practices, such as manure application, wastewater irrigation, and sewage sludge amendment, are primary contributors to this co-contamination. MPs not only serve as physical vectors but also actively interact with antibiotics and ARGs through processes like adsorption, aging, and biofilm formation, enhancing the emergence and dissemination of resistance genes. These interactions disrupt soil physicochemical properties and microbial communities, impairing soil health and reducing crop productivity. Furthermore, the accumulation of MPs and ARGs in edible plants raises concerns about human exposure through the food chain. Emerging evidence links such exposure to health risks, including metabolic, cardiovascular, neurological, and gastrointestinal disorders. Understanding the mechanisms underlying this co-contamination is critical for informing risk assessments and guiding mitigation strategies to protect soil ecosystems and public health.</div></div>","PeriodicalId":292,"journal":{"name":"Current Opinion in Chemical Engineering","volume":"50 ","pages":"Article 101181"},"PeriodicalIF":6.8,"publicationDate":"2025-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145099647","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":"Editorial overview: Transforming water technologies in the United States: Insights from the National Alliance for Water Innovation","authors":"Jeffrey R. McCutcheon , Meagan Mauter","doi":"10.1016/j.coche.2025.101180","DOIUrl":"10.1016/j.coche.2025.101180","url":null,"abstract":"","PeriodicalId":292,"journal":{"name":"Current Opinion in Chemical Engineering","volume":"50 ","pages":"Article 101180"},"PeriodicalIF":6.8,"publicationDate":"2025-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145060992","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":"Photocatalytic slurry reactor for hydrogen production via water splitting","authors":"Hugo de Lasa, Angelo Escudero Romero","doi":"10.1016/j.coche.2025.101179","DOIUrl":"10.1016/j.coche.2025.101179","url":null,"abstract":"<div><div>This article reviews the performance of a photocatalytic Photo-CREC Water-II unit powered by near-UV, or alternatively by visible light, for hydrogen production via water splitting. The radiation equation and its solution are established via a Monte Carlo (MC) method, with simulations being validated experimentally with macroscopic radiation balances. A mesoporous anatase matrix with added palladium photocatalyst with good fluidizability properties is synthesized. The photocatalyst performance is evaluated using QYs (quantum yields) and PTEFs (photocatalytic thermodynamic efficiency factors). It is shown that the TiO<sub>2</sub>–noble metal photocatalyst displays, in Photo-CREC Water-II using near-UV and ethanol as a scavenger, QYs and PTEFs of 0.35 and 0.247, respectively. The reported results pave the way for establishing the irradiation, the photocatalyst loading, the ethanol scavenger concentration, and the pH operating conditions required in an upscaled slurry Photo-CREC Water-II reactor, for producing commercially significant amounts of H<sub>2</sub>.</div></div>","PeriodicalId":292,"journal":{"name":"Current Opinion in Chemical Engineering","volume":"50 ","pages":"Article 101179"},"PeriodicalIF":6.8,"publicationDate":"2025-09-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145020725","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}
Adrian Yaya-González , Jessica Laika , Yeimmy Peralta-Ruiz
{"title":"Emerging nonthermal technologies for food safety: trends, limitations, and future research","authors":"Adrian Yaya-González , Jessica Laika , Yeimmy Peralta-Ruiz","doi":"10.1016/j.coche.2025.101178","DOIUrl":"10.1016/j.coche.2025.101178","url":null,"abstract":"<div><div>Food safety has become a critical global concern. The primary causes of food deterioration and subsequent loss include spoilage by harmful microorganisms and toxic substances that threaten human health. Emerging nonthermal technologies have been developed as alternatives to mitigate or eliminate these losses. These methods include pulsed electric fields, cold plasma, high-pressure processing, ultrasound technology, and photodynamic inactivation. This review summarizes the principles governing each technology and its effects on key food parameters. Additionally, it explores the critical factors influencing the scalability of these technologies and their applicability to various food matrices. Finally, a brief discussion addresses the main limitations and challenges from an engineering perspective, including efficiency, economic constraints, energy consumption, and regulatory compliance barriers.</div></div>","PeriodicalId":292,"journal":{"name":"Current Opinion in Chemical Engineering","volume":"49 ","pages":"Article 101178"},"PeriodicalIF":6.8,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144932103","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 cathode materials and their advancement for sustainable hydrogen evolution reaction in microbial electrolysis cells","authors":"Sneha Prakash Naik , Omprakash Sarkar , Velvizhi Gokuladoss , Leonidas Matsakas , Gunda Mohanakrishna","doi":"10.1016/j.coche.2025.101176","DOIUrl":"10.1016/j.coche.2025.101176","url":null,"abstract":"<div><div>Microbial electrolysis cells (MECs) offers a sustainable route for hydrogen production by decarbonizing global energy demands via transformation of biogenic waste/wastewater. Leveraging microbial metabolism, MECs contribute to the waste-to-energy nexus. The efficiency of MECs is significantly influenced by selection of electrode materials such as platinum, nickel, and stainless steel, which enhance the performance through their high surface area, chemical resilience, and effective hydrogen evolution reaction. MECs have been shown to generate 853 H<sub>2</sub>/m³/d using graphite brush (anode) and Pt-loaded carbon cloth (cathode). MECs were upgraded to 1000 l, having 24 modules with 144 electrode pairs. Key features of cathode materials and its advancements used in MECs are discussed in this review.</div></div>","PeriodicalId":292,"journal":{"name":"Current Opinion in Chemical Engineering","volume":"49 ","pages":"Article 101176"},"PeriodicalIF":6.8,"publicationDate":"2025-08-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144895045","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}
Laura Valenzuela , Zahraa Abou Khalil , Agnieszka M. Ruppert , Marco Daturi , Mohammad El-Roz , Nicolas Keller
{"title":"Hydrogen production by photocatalytic dehydrogenation of formic acid","authors":"Laura Valenzuela , Zahraa Abou Khalil , Agnieszka M. Ruppert , Marco Daturi , Mohammad El-Roz , Nicolas Keller","doi":"10.1016/j.coche.2025.101175","DOIUrl":"10.1016/j.coche.2025.101175","url":null,"abstract":"<div><div>This mini-review updates the most significant recent advances in the promising field of hydrogen production via photocatalytic dehydrogenation of formic acid. The focus is on utilizing formic acid both as a liquid organic hydrogen carrier and as an effective internal hydrogen source for driving hydrogenation reactions. We present a subjective overview of key developments from the past 3 years in both aqueous- and gas-phase reactions, as well as in the rapidly evolving field of dual-mode photonic/thermal catalysis. Particular attention is given to insights into reaction mechanisms through <em>operando</em> FTIR studies, which allow for the direct observation of surface intermediates and the elucidation of possible reaction pathways.</div></div>","PeriodicalId":292,"journal":{"name":"Current Opinion in Chemical Engineering","volume":"49 ","pages":"Article 101175"},"PeriodicalIF":6.8,"publicationDate":"2025-08-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144878419","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}
Salman Ahmadipouya , Usama J Sheikh , Noah Ferguson , Mert C Hacifazlioglu , Deniz Ipekci , Jeffrey R McCutcheon
{"title":"Reduction in solvent and chemical use for membrane manufacturing using electrospray","authors":"Salman Ahmadipouya , Usama J Sheikh , Noah Ferguson , Mert C Hacifazlioglu , Deniz Ipekci , Jeffrey R McCutcheon","doi":"10.1016/j.coche.2025.101173","DOIUrl":"10.1016/j.coche.2025.101173","url":null,"abstract":"<div><div>Electrospray (ES) has recently emerged as a new technique for synthesizing and potentially manufacturing membranes at scale. While touted for its ability to make membranes from a variety of materials, the process also requires little solvent and polymer material. This study highlights the advantages of ES over conventional solution processing methods (at the lab scale) in reducing solvent and chemical consumption. When compared to conventional processes, ES laboratory scale fabrication of liquid and gas separations membranes yielded reductions in solvent and polymer material use on a per-area basis by anywhere from 50 to more than 90%.</div></div>","PeriodicalId":292,"journal":{"name":"Current Opinion in Chemical Engineering","volume":"49 ","pages":"Article 101173"},"PeriodicalIF":6.8,"publicationDate":"2025-08-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144864107","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}
Toluleke E Akinola , Olajide Otitoju , Eni Oko , Meihong Wang
{"title":"Recent advances, challenges and perspectives on rotating packed bed technology in solvent-based post-combustion carbon capture","authors":"Toluleke E Akinola , Olajide Otitoju , Eni Oko , Meihong Wang","doi":"10.1016/j.coche.2025.101174","DOIUrl":"10.1016/j.coche.2025.101174","url":null,"abstract":"<div><div>Rotating packed beds are emerging as a promising alternative to conventional packed beds in solvent-based carbon capture, owing to their high mass transfer rates and compact design. This paper discusses recent advances, challenges and future perspectives associated with RPB technology. Key issues include solvent stability and degradation, corrosion challenges, scaling up for industrial applications and other operational and maintenance hurdles. Future research should focus on developing novel solvents, optimising RPB design, creating high-fidelity models using hybrid approaches, and establishing robust and rigorous procedures for scaling up. Additionally, accurate techno-economic evaluations and exploring decentralised RPB deployment could enhance its commercialisation, making this technology viable for a broader range of industries.</div></div>","PeriodicalId":292,"journal":{"name":"Current Opinion in Chemical Engineering","volume":"49 ","pages":"Article 101174"},"PeriodicalIF":6.8,"publicationDate":"2025-08-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144864108","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}