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":"2025-09-01","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}
Nguyên Hoàng Ly , Lalitha Gnanasekaran , Tejraj M Aminabhavi , Yasser Vasseghian , Sang-Woo Joo
{"title":"Erratum to “Photogenerated charge carriers in photocatalytic materials for solar hydrogen evolution” [Curr Opin Chem Eng 47 (2025) 1087]","authors":"Nguyên Hoàng Ly , Lalitha Gnanasekaran , Tejraj M Aminabhavi , Yasser Vasseghian , Sang-Woo Joo","doi":"10.1016/j.coche.2025.101149","DOIUrl":"10.1016/j.coche.2025.101149","url":null,"abstract":"","PeriodicalId":292,"journal":{"name":"Current Opinion in Chemical Engineering","volume":"49 ","pages":"Article 101149"},"PeriodicalIF":8.0,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144230984","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}
Manisha Sukhraj Kothari, Ashraf Aly Hassan, Amr El-Dieb, Hilal El-Hassan
{"title":"Recent advancements in CO2 capture and storage using carbide slag waste: a review of technological and chemical innovations","authors":"Manisha Sukhraj Kothari, Ashraf Aly Hassan, Amr El-Dieb, Hilal El-Hassan","doi":"10.1016/j.coche.2025.101169","DOIUrl":"10.1016/j.coche.2025.101169","url":null,"abstract":"<div><div>The rapid industrial waste generation has heightened the environmental strain associated with its disposal. Carbide slag waste, a byproduct of acetylene gas production, is primarily composed of calcium hydroxide and poses significant environmental challenges due to its high volume and alkalinity. This review explores the valorization of carbide slag waste for CO<sub>2</sub> capture and storage, particularly via its applications in cyclic CO<sub>2</sub> capture and mineral carbonation. Scientific advancements in cyclic CO<sub>2</sub> capture capacity and stability with antisintering strategies and pelletization for industrial applications are highlighted. Furthermore, through a detailed analysis of various mineral carbonation studies, new technological and chemical innovations that enhance carbonation efficiency, reduce energy costs, improve reaction kinetics, and enable the production of high-value materials are summarized. Concisely, even though the utilization of carbide slag waste for CO<sub>2</sub> capture and conversion offers a sustainable pathway, it needs to be studied at a larger scale to evaluate its feasibility and associated challenges.</div></div>","PeriodicalId":292,"journal":{"name":"Current Opinion in Chemical Engineering","volume":"49 ","pages":"Article 101169"},"PeriodicalIF":6.8,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144827331","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}
Marta Costa Figueiredo , Thijs de Groot , Antoni Forner-Cuenca
{"title":"Editorial overview: Electrochemical energy conversion","authors":"Marta Costa Figueiredo , Thijs de Groot , Antoni Forner-Cuenca","doi":"10.1016/j.coche.2025.101137","DOIUrl":"10.1016/j.coche.2025.101137","url":null,"abstract":"","PeriodicalId":292,"journal":{"name":"Current Opinion in Chemical Engineering","volume":"49 ","pages":"Article 101137"},"PeriodicalIF":8.0,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143875029","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 Clarizia , Abdulaziz Al-Anazi , Changseok Han
{"title":"Photocatalytic generation of hydrogen from a non-carbon source, ammonia in aqueous solutions","authors":"Laura Clarizia , Abdulaziz Al-Anazi , Changseok Han","doi":"10.1016/j.coche.2025.101167","DOIUrl":"10.1016/j.coche.2025.101167","url":null,"abstract":"<div><div>This review investigates hydrogen production via photocatalysis using ammonia, a carbon-free source potentially present in wastewater. Photocatalysis offers low energy requirements and high conversion efficiency compared to electrocatalysis, thermocatalysis, and plasma catalysis. However, challenges such as complex material synthesis, low stability, spectral inefficiency, high costs, and integration barriers hinder industrial scalability. The review addresses thermodynamic requirements, reaction mechanisms, and the role of pH in optimizing photocatalysis. By leveraging ammonia’s potential and advancing photocatalyst development, this study provides a framework for scalable, sustainable hydrogen production and simultaneous ammonia decomposition, paving the way for innovative energy solutions and wastewater management.</div></div>","PeriodicalId":292,"journal":{"name":"Current Opinion in Chemical Engineering","volume":"49 ","pages":"Article 101167"},"PeriodicalIF":6.8,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144780587","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}
Sachini Supunsala Senadheera , Xiangzhou Yuan , Baojun Yi , Seong Kyun Im , Yong Sik Ok
{"title":"Plasma-modified biochar for energy and environmental sustainability","authors":"Sachini Supunsala Senadheera , Xiangzhou Yuan , Baojun Yi , Seong Kyun Im , Yong Sik Ok","doi":"10.1016/j.coche.2025.101166","DOIUrl":"10.1016/j.coche.2025.101166","url":null,"abstract":"<div><div>Biochar has recently emerged as a sustainable material with broad applicability in energy storage, contaminant removal, and carbon capture. However, its performance in these domains is often limited by intrinsic surface properties, including porosity and the abundance of functional groups. Plasma treatment has emerged as a promising postsynthesis strategy to tailor biochar’s surface chemistry and morphology. This short review highlights recent advances in the use of plasma-modified biochar for electrochemical energy storage, pollutant adsorption, and CO₂ capture. In energy storage, plasma modification enhances capacitance particularly in activated biochar by increasing surface area and functional group density. For CO₂ capture, nitrogen doping via plasma processes significantly improves adsorption capacity by enhancing surface basicity and affinity toward CO₂ molecules. In contaminant remediation, plasma treatment introduces oxygen- and nitrogen-containing functional groups, increases hydrophilicity, and promotes the formation of surface defects and active sites, collectively improving adsorption of metals and organic pollutants. Despite these promising advancements, research on plasma-treated biochar remains in its early stages, particularly in the context of direct CO₂ capture, warranting further investigation. Overall, plasma modification offers a versatile, scalable route to enhance the physicochemical properties of biochar, positioning it as a multifunctional platform for environmental and energy-related applications.</div></div>","PeriodicalId":292,"journal":{"name":"Current Opinion in Chemical Engineering","volume":"49 ","pages":"Article 101166"},"PeriodicalIF":8.0,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144634124","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}
Mert Can Hacıfazlıoğlu , Salman Ahmadipouya , Deniz Ipekci , Ying Li , Manish Kumar , Jamie Warner , Yuepeng Zhang , Jeffrey R. McCutcheon
{"title":"Customized membranes: needs and opportunities for moving beyond conventional interfacial polymerization for desalination membranes","authors":"Mert Can Hacıfazlıoğlu , Salman Ahmadipouya , Deniz Ipekci , Ying Li , Manish Kumar , Jamie Warner , Yuepeng Zhang , Jeffrey R. McCutcheon","doi":"10.1016/j.coche.2025.101151","DOIUrl":"10.1016/j.coche.2025.101151","url":null,"abstract":"<div><div>Reverse osmosis (RO) has constituted most of the installed desalination capacity in recent decades. Commercial membranes offer excellent selectivity and reasonable productivity. These membranes, however, suffer from several weaknesses that stem from the use of interfacial polymerization as a means of manufacturing. The inability to control thickness, adjust easily to new chemistries, and avoid surface roughness that enhances foulilng propensity are a few of the weaknesses to conventional membrane fabrication. Numerous materials have been proposed as alternatives to polyamide for RO in recent decades. However, in spite of numerous publications on these new materials, it is remarkable to see how <em>none</em> has even come close to succeeding in replacing conventional RO membrane materials in a commercial setting. This is largely because many of these new materials are incompatible with existing membrane manufacturing approaches such as interfacial polymerization. We must be able to process new materials into thin, defect-free films on conventional supports. This is a significant hurdle for new material adoption in membranes today. New manufacturing methods are needed to address the inherent weaknesses of interfacial polymerization for polyamide and the general processing of newly discovered materials into thin film composite membranes for RO and nanofiltration platforms.</div></div>","PeriodicalId":292,"journal":{"name":"Current Opinion in Chemical Engineering","volume":"49 ","pages":"Article 101151"},"PeriodicalIF":8.0,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144262063","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":"Assessment of removal technologies for microplastics in surface waters and wastewaters","authors":"Maryam Mallek , Damia Barcelo","doi":"10.1016/j.coche.2025.101170","DOIUrl":"10.1016/j.coche.2025.101170","url":null,"abstract":"<div><div>Microplastics and the even more elusive nanoplastics are now recognized as ubiquitous, persistent, and potentially toxic contaminants in surface waters and wastewaters. Despite growing attention, real-world mitigation remains limited. This critical review interrogates the performance, scalability, and lifecycle implications of the principal removal technologies reported between 2016 and 2025. Although the size-exclusion membranes remain the benchmark for absolute removal efficiency (>95% for MPs <0.5 µm), they incur the highest unit-energy demand and chronic fouling. High-affinity sorbents, including Zr-based metal–organic frameworks, graphene-oxide hybrids, and engineered biochars, achieve 90–97% removal at far lower energy input, yet their lifecycle viability hinges on closed-loop regeneration and avoidance of polymer desorption. Magnetic composites (e.g. Fe₃O₄-ZIF-8) deliver near-quantitative capture (∼98%) within minutes, but field-scale demonstrations and robust magnet-recovery protocols are still lacking. Coagulation and electrocoagulation offer the most cost-effective high-throughput solutions (77–98%) but shift the plastic burden into metal-rich sludges. Advanced oxidation processes uniquely mineralize plastics (≤98.4%) albeit at high reagent and energy cost, while nature-based strategies (microbial consortia, hyperthermophilic composting, constructed wetlands) deliver 40–90% removal over longer residence times and remain highly sensitive to environmental variability. Across all classes, nanoplastic (<100 nm) retention is the weakest link, underscoring the need for standardized detection, nanoscale-selective materials, and pilot-scale validation. To support effective implementation, we identify key research priorities, including fouling control, sorbent regeneration, sludge valorization, catalyst stability, and risk assessment, and propose an integrated treatment hierarchy that couples low-energy bulk removal with targeted polishing and safe end-of-life management.</div></div>","PeriodicalId":292,"journal":{"name":"Current Opinion in Chemical Engineering","volume":"49 ","pages":"Article 101170"},"PeriodicalIF":6.8,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144780588","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":"Oxidation of alcohols in photocatalytic hydrogen production: from sacrifice to valorization","authors":"Patricia Garcia-Muñoz , Fernando Fresno","doi":"10.1016/j.coche.2025.101146","DOIUrl":"10.1016/j.coche.2025.101146","url":null,"abstract":"<div><div>Photocatalytic hydrogen production, even if it should ideally be performed from pure water (i.e. <em>water splitting</em>), benefits from the presence of an <em>easily</em> oxidized reagent, either inorganic (classically sulfite/sulfide) or organic (classically methanol) that scavenges photoproduced holes and alleviates the process form the kinetically hindered, multi-electron process of water oxidation to molecular oxygen. Even if pioneering works of the photocatalytic reaction between alcohols and water examined the outcome of the oxidation branch of the reaction, the use of these reagents passed through a period in which reporting only hydrogen evolution became common practice, assuming total oxidation and taking the consumption of the organic as a <em>sacrifice</em> for hydrogen production. However, in more recent years, the oxidation outcome of the reaction has regained attention, mainly because of the interest in coupling photocatalysis with biomass utilization. Thus, the <em>valorization</em> of biomass-derived alcohol hole scavengers has become an interesting topic in photocatalysis research. Here, we highlight some recent works on this topic, selecting those that have received more attention in the last 2–5 years: polyol (glycerol, glucose) valorization, transformations of furfuryl alcohol and 5-hydroxymethyl furfural, and C-C coupling reactions starting from alcohols. In our opinion, these represent promising niches for the application of photocatalytic processes.</div></div>","PeriodicalId":292,"journal":{"name":"Current Opinion in Chemical Engineering","volume":"49 ","pages":"Article 101146"},"PeriodicalIF":8.0,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143943484","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":"2025-09-01","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}