Erratum to“Probing the Interfacial Forces and Surface Interaction Mechanisms in Petroleum Production Processes”[Engineering 18(2022)49-61]

In Ref.[1],Eq.(8)has a typo,the following replacement should be done.γ_(bb)/2rδ/δr(rδ(r,t)/δr=2γ_(bb)/R_(bb)-Þ(t,t)-Ⅱ[h[r,t)](bubble=drop-bubble=drop)The publisher regrets an error in the original–article,and the sentence that explained the equation“Eqs.(8)–(10)show the augmented Young–Laplace equation for the interactions of gas bubbles or liquid droplets in different configurations,where Rb is the bubble/drop radius,Rp is the particle radius,Rbp=(1/Rb+1/Rp)1.

Probing the Interfacial Forces and Surface Interaction Mechanisms in Petroleum Production Processes

Despite the advances that have been made in renewable energy over the past decade,crude oil or petroleum remains one of the most important energy resources to the world.Petroleum production presents many challenging issues,such as the destabilization of complex oil-water emulsions,fouling phenomena on pipelines and other facilities,and water treatment.These problems are influenced by the molecular forces at the oil/water/solid/gas interfaces involved in relevant processes.Herein,we present an overview of recent advances on probing the interfacial forces in several petroleum production processes(e.g.,bitumen extraction,emulsion stabilization and destabilization,fouling and antifouling phenomena,and water treatment)by applying nanomechanical measurement technologies such as a surface forces apparatus(SFA)and an atomic force microscope(AFM).The interaction forces between bitumen and mineral solids or air bubbles in the surrounding fluid media determine the bitumen liberation and flotation efficiency in oil sands production.The stability of complex oil/water emulsions is governed by the forces between emulsion drops and particularly between interface-active species(e.g.,asphaltenes).Various oil components(e.g.,asphaltenes)and emulsion drops interact with different substrate surfaces(e.g.,pipelines or membranes),influencing fouling phenomena,oil-water separation,and wastewater treatment.Quantifying these intermolecular and interfacial forces has advanced the mechanistic understanding of these interfacial interactions,facilitating the development of advanced materials and technologies to solve relevant challenging issues and improve petroleum production processes.Remaining challenges and suggestions on future research directions in the field are also presented.

Fabricating tiny oil droplets via reversible superwetting transition method and associated surface interaction mechanism

Tiny droplets on nano‐and pico‐liter scales exhibit unique physical and chemical properties and play a key role in many applications,including high‐resolution printing,hollow material fabrication,microreactors,and drug delivery/sustained release.1–4 Developing efficient and controllable approaches for mass production of tiny droplets with the desired size range is of great interest to researchers in various fields.Present technologies for generating tiny droplets include two major types:micro‐orifice‐based methods and micro‐orifice‐free methods.5 The former type of methods,for instance,piezo‐driven injection and inkjet printing,usually generate tiny droplets by squeezing liquids through ultra‐fine nozzles/tips/channels.Such micro‐orifice‐based methods usually have high efficiency and controllability yet face challenges,such as micro‐orifice clogging and damage.Instead of employing nozzles or tips,the micro‐orifice‐free methods(e.g.,pyroelectrodynamic shooting)ingeniously use the wetting behavior and hydrodynamic properties of liquids to dispense tiny droplets.6,7 Such methods avoid the problems induced by micro‐orifices but suffer from small throughputs and complex operations.