The semiconducting properties of the heteroleptic and homoleptic bis(phthalocyaninato) holmium complexes bearing electron-withdrawing phenoxy substituents at phthalocyanine periphery, namely Ho(Pc)[Pc(OPh)8] (1) Ho[Pc(OPh)8]2 (2) [Pc = unsubstituted phthalocyaninate; Pc(OPh)8 2,3,9,10,16,17,23,24-octaphenoxyphthalocyaninate] have been investigated comparatively. Using a solution-based Quasi–Langmuir–Shäfer (QLS) method, thin solid films two compounds were fabricated. structure by UV-vis...

Cold production is a challenge in the case of heavy oil because its high viscosity and poor fluidity reservoir conditions. Alkali–cosolvent–polymer flooding type microemulsion with low costs possible potential for reservoirs. However, addition polymer may cause problems injection highly viscous oil. Hence, this study feasibility alkali–cosolvent (AC) reservoirs was investigated via several groups experiments. The interfacial tension between various AC formulations crude measured to select...

In recent years, gas injection, especially CO2 has been acknowledged as a promising approach for enhanced oil recovery (EOR) and capture storage (CCS), tight reservoirs. However, when is injected into the reservoirs, it can disturb equilibrium of system lead to chemical reactions between CO2, formation water, reservoir rocks. The will alter some geochemical physicochemical characteristics target still lack quantitative characterization at pore scale, under conditions. Herein, we conducted an...

Shale cores, with their ultralow permeability, often require pressurization for saturation target fluids, as flow-through is inefficient. This method, when applied by using live oil, leads to fluid loss during core transfer and system vacuuming in subsequent experimental steps. As a result, most shale-related experiments utilize degassed oils, typically dead oil or kerosene. However, researchers account only density viscosity similarities preparation, missing key aspects of the gas injection...

In situ CO2 enhanced oil recovery (ICE) shows great potential for increasing field tertiary recovery. Instead of injecting liquid directly into the reservoir, a solution CO2-generating agent is injected to deliver targeted zone. Urea an attractive gas-generating ICE because it has both low price and exceptional stability in brine with elevated divalent cation concentrations. Besides CO2, urea thermal hydrolysis releases NH3(aq). Both molecules have positive impacts on recovery, such as...

Abstract Polymer solution for oil displacement is mostly used in the middle and late stage of water flooding reservoir development, groundwater conditions are often one main restricting polymer application. Therefore, it necessary to develop salt tolerance solutions with different aggregation behaviors, so as facilitate synthesis optimization suitable systems. The differences micro‐aggregation behavior three polymers molecular structures were explored. On this basis, effects divalent metal...

Artificial lift systems, such as electrical submersible pumps and sucker rod pumps, frequently encounter operational challenges due to high gas–oil ratios, leading premature tool failure increased downtime. Effective upstream gas separation is critical maintain continuous operation. This study aims predict the efficiency of downhole separator using machine learning models trained on data from a centrifugal tested gravity (blind test). A comprehensive experimental setup included multiphase...

When applied to extra-heavy oil, conventional polymer surfactants exhibit poor efficacy in reducing viscosity and have limited adaptability. In this work, a novel amphiphilic named PAADB was prepared by incorporating 2-acryloylamino-2-methyl-1-propanesulfonic acid (AMPS), benzyldimethyl [2-[(1-oxoallyl) zoxy] propyl] ammonium chloride (DML), poly(ethylene glycol) methyl ether acrylate (BEM) into the main chain of acrylamide through free radical polymerization. exhibited outstanding...

Using surfactant blends to mobilize residual oil offers a promising technique for enhanced recovery (EOR) and surfactant-enhanced aquifer remediation (SEAR). A major financial setback broader application of this method is the loss surfactants, as they get absorbed onto reservoir mineral surfaces. This becomes even more costly in fields with high-salinity formation water. Our research delved into use hydrotropes minimize absorption. The impacts adsorption hydrotrope additives were quantified...

In this study the sewage sludge are treated by microwave assisted pyrolysis (MAP) with different receptors, and then, immobilization of heavy metals in residues evaluated through toxicity characteristic leaching procedure (TCLP) sequential extraction procedure. The volatilization Cd, Pb Zn could be decreased MAPs more efficiently than conventional (CP). average percentages Cu, produced 90%, 88% 81% CP process respectively, no Cd is detected. Moreover, 67% Pb, 55% MAP speciated into stable...

Abstract While injection of CO2 has great potential for increasing oil production, this is limited by site conditions and operational constraints such as lack proper infrastructure, cheap sources, viscous fingering, gravity override at the targeted zones, so forth. To mitigate some these common limitations, we explore alternative methodologies which can successfully deliver through gas generation in situ, with superior IOR performance, while offering reasonable chemical cost. dissolved...

Abstract The use of microemulsions to enhance well productivity is becoming increasingly popular, especially in unconventional shale wells during fracturing. However, the subsequent behavior and stability remain unclear, particularly clay-hosted nanopores where clay minerals have unbalanced surface charges. This study uses molecular dynamics (MD) simulations analyze microemulsion droplets with varying chemistries salinities shales, under typical reservoir pressures temperatures. Our results...

In this study, we investigate the characteristics of activated sludge pretreated with microwave irradiation and factors influencing effects. The pretreatment process was carried out using a lab-scale industrial unit (2450 MHz frequency). Parameters such as dewatering, settling, volume index (SVI 30 ), water percent content, filterability, extracellular polymeric substances (EPS), microbe structure others, were used to quantify SVI specific resistance filtration (SRF) treated by 1000W for 40s...

This paper mainly focused on the characteristics of pyrolysis temperature and bio-fuel production, energy recovery efficiency sludge by MP was also explored.The results show that final sample added carbonaceous residue (CR) is above 700°C maximum heating rate up to 1.783°C/s. While with activated carbon (AC) 1.084°C/s. The caloric value oil production can reach 41.57MJ/kg, content PAHs less than 4.54%. volume fractions H 2 CO in gas are higher 54%, values 9 540kJ/m 3 . use as bio-fule.The...

Abstract Understanding the transport of carbon nanotubes in porous media is essential to their applications subsurface reservoirs, e.g., delivering catalysts or chemicals targeted formations. In this study, a series laboratory experiments are conducted explore surfactant‐dispersed multiwalled (MWNT) different flow‐through columns at elevated electrolyte levels. Noncovalent bonding ethoxylated alcohols adsorbed on MWNT surface provides them with outstanding dispersion stability and excellent...