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Processes publishes Special Issues to create collections of papers on specific topics, with the aim of building a community of authors and readers to discuss the latest research and develop new ideas and research directions. Special Issues are led by Guest Editors, who are experts on the topic and all Special Issue submissions follow MDPI's standard editorial process. The journal’s Editor-in-Chief and/or designated Editorial Board Member will oversee Guest Editor appointments and Special Issue proposals, checking their content for relevance and ensuring the suitability of the material for the journal. The papers published in a Special Issue will be collected and displayed on a dedicated page of the journal’s website. Further information on MDPI's Special Issue policies and Guest Editor responsibilities can be found here. For any inquiries related to a Special Issue, please contact the Editorial Office.

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Optimizing Metal Extraction Processes: Recent Advances in Leaching Technology

edited by

Mizraim U. Flores

submission deadline 30 Jan 2026 | Viewed by 235 | Submission Open

Keywords: leaching; metals; extraction; metallurgy; novel processes; sustainable processes

(This special issue belongs to the Section Separation Processes)

Recent Advances in the Effects of Thermal Processes on Alloy Microstructure and Mechanical Properties

edited by Milica Vasić and Qingmin Yu

submission deadline 30 Jan 2026 | Viewed by 145 | Submission Open

Keywords: alloys; heat treatment; thermal stability; microstructure; phase transformations; precipitation strengthening; mechanical properties

(This special issue belongs to the Section Materials Processes)

Hydrogen–Carbon Storage Technology and Optimization

edited by

Abubakar Isah

and Arshad Raza

submission deadline 30 Jan 2026 | Viewed by 70 | Submission Open

Keywords: hydrogen storage; carbon storage; energy transition; decarbonization; rock– fluid interactions for H2 and CO2; injectivity and withdrawal; sustainability; power-to-gas-to-storage

(This special issue belongs to the Section Energy Systems)

Advances in Evaluation, Development, Simulation and Utilization of Geo-Energy Resources and Underground Space

edited by Zhixue Sun

submission deadline 30 Jan 2026 | Viewed by 40 | Submission Open

Keywords: geo-energy resources; quantitative evaluation; efficient development; underground space utilization; underground gas storage (UGS); seepage flow simulation

(This special issue belongs to the Section Energy Systems)

Progress on Solid Fuel Combustion, Pyrolysis and Gasification

edited by Xinyu Wang and Yang Liu

submission deadline 30 Jan 2026 | Viewed by 21 | Submission Open

Keywords: coal; biomass; organic solid waste; pyrolysis and gasification; combustion; radiation spectrum; single-particle char combustion; ash melting

(This special issue belongs to the Section Chemical Processes and Systems)

Machine-Learning-Assisted Intelligent Processing and Optimization of Complex Systems, 2nd Edition

edited by

Xiong Luo

and Manman Yuan

submission deadline 30 Jan 2026 | Viewed by 15 | Submission Open

Keywords: intelligent processing; machine learning; optimization; complex system; control

(This special issue belongs to the Section AI-Enabled Process Engineering)

Recent Advances in Industrial Applications of Photo/Electrocatalysis

edited by Mohamed A. Abdellah

submission deadline 30 Jan 2026 | Viewed by 5 | Submission Open

Keywords: photocatalysis; electrocatalysis; industrial processes; catalytic materials; reactor design

(This special issue belongs to the Section Catalysis Enhanced Processes)

Comprehensive Evaluation and Utilization of Coal Measure Mineral Resources

edited by

Junjian Zhang

Yang Wang

and Junqiang Kang

submission deadline 31 Jan 2026 | 13 articles | Viewed by 6990 | Submission Open

Keywords: coalbed methane; coal measure minerals; critical elements; resource evaluation

(This special issue belongs to the Section Chemical Processes and Systems)

Advanced Green Materials in Water and Wastewater Treatment

edited by

Belkis Sulbarán Rangel

submission deadline 31 Jan 2026 | 2 articles | Viewed by 6635 | Submission Open

Keywords: biomaterial; renewable raw materials; circular economy; green processes; green chemistry; waste recovery; biomass; wastewater treatment systems; emerging contaminants

(This special issue belongs to the Section Environmental and Green Processes)

Oil and Gas Well Engineering: Experimental and Numerical Investigation

edited by

Zhengming Xu

submission deadline 31 Jan 2026 | 7 articles | Viewed by 6079 | Submission Open

Keywords: multiphase flow modeling; drilling technology; high-temperature high-pressure (HTHP) wells; well integrity and risk management; computational fluid dynamics (CFD); oil and gas production optimization; real-time monitoring and control; enhanced well performance; reservoir engineering simulations; wellbore stability

(This special issue belongs to the Section Energy Systems)

Multi-Criteria Decision Making in Chemical and Process Engineering

edited by

Gade Pandu Rangaiah

Andrew Hoadley

and Zhiyuan Wang

submission deadline 31 Jan 2026 | 3 articles | Viewed by 4756 | Submission Open

Keywords: multi-criteria decision making; multi-criteria analysis; process selection; process design; multi-objective optimization; chemical processes; sustainable chemical engineering; sensitivity analysis

(This special issue belongs to the Section Chemical Processes and Systems)

Micro/Nano Manufacturing Processes: Theories and Optimization Techniques (2nd Edition)

edited by

Wai Sze Yip

Zejia Zhao

and

Guoqing Zhang

submission deadline 31 Jan 2026 | 3 articles | Viewed by 3872 | Submission Open

Keywords: micro/nano manufacturing; theories; molecular dynamic; optimization methods; size effects; micro/nano additive manufacturing; non-conventional micro machining; nanomaterials; applications

(This special issue belongs to the Section Manufacturing Processes and Systems)

Process Modeling, Simulation, and Optimization in Chemical Engineering

edited by

Javier Silva

Wei Sun

and

Rodrigo Ortiz-Soto

submission deadline 31 Jan 2026 | 2 articles | Viewed by 2849 | Submission Open

Keywords: process modeling; process simulation; process optimization; chemical engineering; techno-economic analysis; environmental impact; integration of renewable energies; artificial intelligence in chemical processes; sustainable processes; advanced process control

(This special issue belongs to the Section Chemical Processes and Systems)

Multi-Phase Flow and Heat and Mass Transfer Engineering

edited by

Bin Ding

, Xiao Cheng and Mingfei Mu

submission deadline 31 Jan 2026 | 4 articles | Viewed by 2381 | Submission Open

Keywords: multiphase flow; phase change; heat transfer enhancement; droplets; microchannel; emerging thermo-fluid; thermal management

(This special issue belongs to the Section Energy Systems)

Adsorbent Materials for Water Treatment: Innovations in Pollutant Removal

edited by Maria Angélica Simões Dornellas Barros and

Thiago Peixoto De Araújo

submission deadline 31 Jan 2026 | 2 articles | Viewed by 2253 | Submission Open

Keywords: adsorbent materials; water treatment; pollutant removal; nanotechnology; electrochemical methods; sorption technologies; hybrid treatment systems; green remediation; metal– organic frameworks (MOFs); magnetic materials; starch-based adsorbents; bioadsorption

(This special issue belongs to the Section Environmental and Green Processes)

Microstructure Properties and Characterization of Metallic Material

edited by

Edwan Anderson Ariza Echeverri

and Crispulo Enrique Deluque Toro

submission deadline 31 Jan 2026 | 1 articles | Viewed by 1311 | Submission Open

Keywords: microstructure evolution; alloy design; mechanical properties; phase transformations; heat treatment; surface engineering; microstructural characterization; advanced materials; modelling; simulation

(This special issue belongs to the Section Materials Processes)

Processes Development for Wastewater Treatment

edited by

Mohamed A. Dawoud

submission deadline 31 Jan 2026 | 2 articles | Viewed by 1021 | Submission Open

Keywords: wastewater management; treatment technologies; wastewater reuse; biosolids production; managed aquifer recharge

(This special issue belongs to the Section Chemical Processes and Systems)

Advanced and Novel Physico-Chemical and Biological Wastewater Treatment Technologies

edited by

Eliseo Cristiani-Urbina

submission deadline 31 Jan 2026 | 1 articles | Viewed by 631 | Submission Open

Keywords: wastewater treatment; activated sludge processes; aerobic/anaerobic biodegradation processes; biofilm processes; membrane bioreactors; emerging chemical treatment; combined biological processes

(This special issue belongs to the Section Environmental and Green Processes)

Advancing Sustainable Chemical Processes Through the Design of Ionic Liquids

edited by

Ana Cristino

and

Rui Galhano dos Santos

submission deadline 31 Jan 2026 | Viewed by 590 | Submission Open

Keywords: ionic liquids; sustainability; chemical processes; green chemistry; innovation

(This special issue belongs to the Section Sustainable Processes)

Processing and Applications of Polymer Composite Materials

edited by Antônio Benjamim Mapossa

submission deadline 31 Jan 2026 | 1 articles | Viewed by 496 | Submission Open

Keywords: polymer composites; processing techniques; additives; fibers; membranes; hybrid matrix; performance

(This special issue belongs to the Section Chemical Processes and Systems)

Advanced Technologies of Tea Preparation, Quality Control, and Fine Processing

edited by Fangyuan Fan

submission deadline 31 Jan 2026 | Viewed by 338 | Submission Open

Keywords: processing technology; tea quality; flavor; equipment; taste; aroma

(This special issue belongs to the Section Food Process Engineering)

Multi-Objective Optimization for Sustainable Industrial Systems Design

edited by Ashish Gujrathi

submission deadline 31 Jan 2026 | Viewed by 313 | Submission Open

Keywords: Multi-Objective Optimization (MOO); Pareto front; sustainability metrics; trade-off analysis; Life Cycle Assessment (LCA); circular economy; adaptive algorithms; energy efficiency; supply chain optimization; robustness and resilience

(This special issue belongs to the Section Process Control and Monitoring)

Renewable Energy Horizons: Biomass Waste Valorization

edited by

Fidel Vallejo Gallardo

submission deadline 31 Jan 2026 | Viewed by 286 | Submission Open

Keywords: biomass waste; valorization; renewable energy; biofuels; anaerobic digestion; pyrolysis; gasification; fermentation

(This special issue belongs to the Section Energy Systems)

Advanced Application of Photoelectrocatalysis for Energy Conversion

edited by Juan Manuel Mora-Hernández and Jesús Adrián Díaz-Real

submission deadline 31 Jan 2026 | Viewed by 262 | Submission Open

Keywords: photoelectrochemistry; watersplitting; hydrogen generation; CO2 photoelectroreduction; photoelectrodes; semiconductors; photocatalysis

(This special issue belongs to the Section Energy Systems)

High-Performance Organic Solar Cells (OSCs) for a Green Future

edited by

Safae Aazou

and

Daniel Ayuk Mbi Egbe

submission deadline 31 Jan 2026 | Viewed by 207 | Submission Open

Keywords: organic solar cells; novel organic semiconductors; donor-acceptor interfaces; solution-processing methods; charge transport; recombination losses; stability; encapsulation and degradation mechanisms of OSCs; lifetime analysis; simulation and modeling

(This special issue belongs to the Section Energy Systems)

Innovative Gas Hydrate Technologies for a Sustainable Energy Future

edited by

Hamed Hashemi

and

Saeedeh Babaee

submission deadline 31 Jan 2026 | Viewed by 77 | Submission Open

Keywords: gas hydrates; sustainable energy; CO2 sequestration; hydrogen storage; AI in chemical engineering; thermodynamic modeling; desalination; molecular simulations; porous media; environmental applications

(This special issue belongs to the Section Energy Systems)

Thermodynamics and Fluid Mechanics in Energy Systems

edited by

Shengquan Zhou

, Junyu Tao and

Zhiwei Wang

submission deadline 31 Jan 2026 | Viewed by 76 | Submission Open

Keywords: thermodynamics; fluid mechanics; energy systems; biomass conversion; solid waste utilization

(This special issue belongs to the Section Energy Systems)

Sustainable Processing Design for Functional Ingredients in Food

edited by Betsabe Hernandez Santos,

Jesús Rodríguez-Miranda

and

Juan Gabriel Torruco-Uco

submission deadline 31 Jan 2026 | Viewed by 75 | Submission Open

Keywords: sustainability; green processing; functional ingredients; emerging technologies; natural bioactives; byproduct valorization; healthy foods; energy efficiency; food biorefineries; technological innovation

(This special issue belongs to the Section Food Process Engineering)

Application of Artificial Intelligence and Optimization Algorithms in Power Systems and Energy Storage

edited by

Muhammad Usama

and

Nicolas Langlois

submission deadline 31 Jan 2026 | Viewed by 71 | Submission Open

Keywords: AI-driven control; power systems; optimization strategies; smart grids; renewable energy storage; grid stability; metaheuristic techniques

(This special issue belongs to the Section Energy Systems)

Application of Artificial Intelligence in Industrial Process Modelling and Optimization (2nd Edition)

edited by

Sheng Du

Li Jin

, Pan Yu and

Hao Liu

submission deadline 31 Jan 2026 | Viewed by 66 | Submission Open

Keywords: industrial process modeling; intelligent optimization; artificial intelligence; decision support systems; cyber– physical systems

(This special issue belongs to the Section AI-Enabled Process Engineering)

Process Engineering: Process Design, Control, and Optimization

edited by

Salvador Tututi-Avila

submission deadline 31 Jan 2026 | Viewed by 63 | Submission Open

Keywords: process design; process control; process optimization; modeling and simulation; process systems engineering; sustainable processes; chemical engineering; industrial processes; advanced control; artificial intelligence

(This special issue belongs to the Section Process Control and Monitoring)

Pharmacokinetic Modeling and Optimal Experimental Design: Applications and Prospects

edited by

Nora Mestorino

and

Daniel Buldain

submission deadline 31 Jan 2026 | Viewed by 56 | Submission Open

Keywords: pharmacokinetic modelling; optimal experimental design; PK/PD integration; model-informed drug development; bayesian pharmacometrics; translational pharmacology; veterinary pharmacology; precision dosing; machine learning in pharmacology

(This special issue belongs to the Section Pharmaceutical Processes)

Chemical Characterization of Nanomaterials with Electrochemical Technology

edited by Gean Arteaga Arroyo and

Manuel Gacitúa

submission deadline 31 Jan 2026 | Viewed by 52 | Submission Open

Keywords: nanomaterials; electrochemical; powerful technique; electron

(This special issue belongs to the Section Chemical Processes and Systems)

High-Effective Energy Conversion for Sustainable Environment

edited by

Jamil Toyir

submission deadline 31 Jan 2026 | Viewed by 42 | Submission Open

Keywords: materials; processes; energy efficiency; decarbonization; renewable energies; sustainable environment; carbon neutrality

(This special issue belongs to the Section Sustainable Processes)

Technologies for Production, Processing, and Extraction of Natural Products, 3rd Edition

edited by

Pasquale Crupi

submission deadline 31 Jan 2026 | Viewed by 39 | Submission Open

Keywords: natural product chemistry; biological sources; leftovers; production methods; processing; non-conventional extractions; methods of analysis

(This special issue belongs to the Section Biological Processes and Systems)

Sustainable Pathways in Chemical Process Engineering: Innovations, Optimization and Circular Strategies

edited by Andres F. Suárez and Laura Rosa Conde-Rivera

submission deadline 31 Jan 2026 | Viewed by 36 | Submission Open

Keywords: sustainable process engineering; biofuels and bioproducts; green chemistry and catalysis; circular economy and waste valorization; carbon capture and utilization (CCU); life cycle assessment (LCA) and techno-economic analysis (TEA); process modeling and optimization

(This special issue belongs to the Section Chemical Processes and Systems)

Design of Next-Generation Batteries: Materials, Cell Performance and Production Processes

edited by

Shivam Kansara

submission deadline 31 Jan 2026 | Viewed by 27 | Submission Open

Keywords: next-generation battery; battery materials; electrode innovation; cell performance; battery design; energy storage; computational modeling

(This special issue belongs to the Section Manufacturing Processes and Systems)

Hydraulic Fracturing Process, Simulation and Modeling in Petroleum Engineering

edited by Jingyu Xie and Zhennan Zhu

submission deadline 31 Jan 2026 | Viewed by 26 | Submission Open

Keywords: experimental and numerical simulation; initiation and propagation of hydraulic fracture; low-carbon energy; field operation; mechanical model

(This special issue belongs to the Section Energy Systems)

Advanced Technologies for Energy Storage

edited by

Pompodakis Evangelos

submission deadline 31 Jan 2026 | Viewed by 24 | Submission Open

Keywords: energy storage; advanced batteries; power systems; ancillary services; smart grids; electric vehicles; power system resilience

(This special issue belongs to the Section Energy Systems)

Advances in Bioprocess Technology, 2nd Edition

edited by

Francesca Raganati

and

Alessandra Procentese

submission deadline 31 Jan 2026 | Viewed by 23 | Submission Open

Keywords: bioprocess engineering; fermentation; upstream processing; downstream processing; biomass valorization; bioreactors; bio-based products

(This special issue belongs to the Section Biological Processes and Systems)

Industrial Post-Combustion CO₂ Capture: Solvent Development and Process Intensification

edited by

Saudagar Dongare

, Sabhapathy Palani and

Vaishali Khokhar

submission deadline 31 Jan 2026 | Viewed by 18 | Submission Open

Keywords: post-combustion CO2 capture ; carbon capture technologies ; solvent development ; process intensification ; industrial decarbonization ; energy efficiency ; net-zero strategies ; sustainable engineering ; CO2 utilization ; flue gas treatment ; carbon policy ; economic incentives

(This special issue belongs to the Section Chemical Processes and Systems)

Advances in Food Processing Techniques and Nutritional Analysis

edited by

Elisavet Bouloumpasi

submission deadline 31 Jan 2026 | Viewed by 17 | Submission Open

Keywords: food processing; nutritional analysis; high-pressure processing; microwave-assisted methods; spray-drying; encapsulation; fermentation; nutrient retention; food safety

(This special issue belongs to the Section Food Process Engineering)

Drilling Technologies for the Exploration and Exploitation of Deep Energy Resources

edited by Xianyu Yang

submission deadline 31 Jan 2026 | Viewed by 14 | Submission Open

Keywords: drilling; deep energy resources; shale gas; coalbed methane; shale oil; drilling fluid and fracturing fluid; microseismic monitoring; experiments and numerical simulations; artificial intelligence and machine learning

(This special issue belongs to the Section Chemical Processes and Systems)

Advances in Mixing Technology for Industry Processing: Design, Optimization, and Performance Analysis

edited by

Kunlei Wang

and Jianbin Luo

submission deadline 31 Jan 2026 | Viewed by 13 | Submission Open

Keywords: mixing technology; process optimization; Computational Fluid Dynamics (CFD); Response Surface Methodology (RSM); Design of Experiments (DoE); mixing models and simulations

(This special issue belongs to the Section Process Control and Monitoring)

2nd Edition of Green Particle Technologies: Processes and Applications

edited by

Haiping Zhang

Hui Zhang

and Wei Liu

submission deadline 31 Jan 2026 | Viewed by 11 | Submission Open

Keywords: powder technology; green process; particle formation; particle modification; green material; green product; waste/harmful particles; characterization method

(This special issue belongs to the Section Particle Processes)

2nd Edition of Applications of Computational Fluid Dynamics (CFD) in Chemical Process Simulations

edited by

Ziqi Cai

and

Yucheng Yang

submission deadline 31 Jan 2026 | Viewed by 7 | Submission Open

Keywords: fluid flow; multiphase; complex fluids; heat transfer; mass transfer; process intensification

(This special issue belongs to the Section Chemical Processes and Systems)

Recycling and Reusing of Various Spent Batteries

edited by Marcos B.J.G. Freitas and Éric Marsalha Garcia

submission deadline 5 Feb 2026 | Viewed by 393 | Submission Open

Keywords: recycling; batteries; lithium-ion batteries; nickel– metal hydride batteries; zinc– manganese oxide batteries; nickel– cadmium battery; green recycling; circular economy

(This special issue belongs to the Section Environmental and Green Processes)

Research Progress in Nano Thin Film Technology

edited by Ching-Yu Wang, Kai Shen and

Prashant K. Sarswat

submission deadline 5 Feb 2026 | Viewed by 39 | Submission Open

Keywords: synthesis processes of thin films; surface and interface properties; design of thin films; crystallized and amorphous thin films; physical and chemical properties of thin films; characterization of thin films; catalysis; energy storage; electronics; optics

(This special issue belongs to the Section Chemical Processes and Systems)

Numerical Modeling and Optimization of Fluid Flow in Engines

edited by Ziao Wang,

Chengkun Lv

and Nan Li

submission deadline 5 Feb 2026 | Viewed by 11 | Submission Open

Keywords: flow mechanism; aerodynamics; flow control method; intelligent fluid dynamics; dynamic modeling; dynamic modeling; multivariable control

(This special issue belongs to the Section Energy Systems)

Green Mineral Processing and Metallurgy: Resource Recovery, Utilization and Process Optimization

edited by