Adsorption-based osmotic heat engines offer an alternative way for converting ultra-low temperature waste heat into electricity. Here, considering the heat and mass transfer characteristics in the adsorbent bed, a computational fluid dynamic model is developed to describe the adsorption-based osmotic heat engine for power and refrigeration cogeneration. Impacts of the porosity distribution, adsorption

The multi-objective optimization of the economics and environmental protection of the fluidized catalytic cracking reaction-regeneration (FCC-RR) process can achieve a balanced production of light olefins, and other chemicals while mitigating pollutant gas emissions. This paper proposes a novel multi-objective optimization framework that integrates the FCC-RR lumped kinetic model and SPEA-2 algorithm

Semi-dry flue gas desulfurization and purification technology is a promising flue gas treatment technique. This study numerically investigated the influence of factors such as nozzle expansion angle, and fluidized particles diameter on the purification of SO2 and HF in the spouted bed. The study showed that in nozzle expansion angles of 5-25°, the 10° expansion angle is optimal for SO2 and HF purification

With their high-energy density and low-price advantage, potassium (K) metal batteries have been considered the next generation of energy storage system. However, applications of K metal anode are always obstructed by severe side reactions and rapid growth of K dendrites upon cycles due to the fragile solid electrolyte interface (SEI). Herein, a novel mechanical-electrochemical stability enhancement

The present work studied the hydrogen production and transformation path of the gasification of domestic sludge with the hydrothermal aqueous phase (HTAP). The organic fractions of HTAP were found to significantly enhance the efficiency of sludge gasification for hydrogen production. FTIR and GC–MS were used to characterize the hydrothermal aqueous phase to further investigate the gasification pathways

In this work, three ionic liquids (ILs) based on acetate, namely tetraethylammonium acetate ([N2222][Ac]), 1-hexyl-2,3-dimethylimidazolium acetate ([HMMIM][Ac]), and tributylmethylammonium acetate ([N4441][Ac]) were selected to separate the methyl ethyl ketone - methanol azeotrope. The vapor–liquid equilibrium (VLE) data of the binary system (methyl ethyl ketone + methanol) and the ternary systems

Often, culturing during bioprocessing generates severe conditions that modify the viscosity of the culture media. The change in viscosity leads to different microenvironments governed by viscous effects-mediated hydrodynamics. For example, different bubble size distributions are dispersed inside a bioreactor due to viscous effects. Traditionally, the mathematical modeling framework used in numerical

Air injection through a single circular nozzle has been used for aeration enhancement, oxygen transfer, and mixing in natural lakes and reservoirs. A series of laboratory experiments with different hydrodynamic conditions was carried out to improve mixing capacity and entrainment in vertically discharged bubble plumes. Hydrodynamic modifications were performed by inserting a grid-screen with different

A photocatalytic process under visible light irradiation (LED lamp 13 W) assisted by ultrasound and hydrogen peroxide was investigated, aiming at enhancing the hydroxyl radical production compared to simple photocatalysis. Several parameters, including ultrasound power and H2O2 concentration, were investigated in the degradation of Rhodamine B. Fe doped TiO2 synthesized by the solid-state method was

This paper focusses on comparing carbon footprints of supplying process plant steam and electricity using boiler/grid, gas turbine and steam turbine CHP systems, and grid heat & power (grid-HP), and investigating the effect of key parameters on the carbon footprints. These parameters include fuel type, grid carbon intensity, plant heat to electric power ratio, plant steam pressure, and operational

During pressurized water reactor (PWR) operations, the two-phase flow may occur in local subchannels, such as the reactivity-insertion accident. The gas phase will migrate laterally to the surrounding subchannel, whose flow characteristics are still not clear but are very important for safety analysis. This paper conducted an experimental investigation on the gas-phase migration across the gap under

Foam application of chemicals to the wet web is currently being developed for the paper and board industry. An important part of this work is to understand the rheology of the used application foams. Polyvinyl alcohol (PVOH) is widely used as a strength additive in paper and board, and it was the main surfactant in this study. The PVOH foam density varied between 100 kg/m3 and 300 kg/m3 and the dosage

Octafluoropropane (C3F8) is a kind of super greenhouse gas, and the low concentration of octafluoropropane makes it difficult to be adsorbed and removed. In this study, a series of Co-doped MOFs (CoxCr-MIL-101) have been successfully synthesized using a hydrothermal method without the addition of strong acids such as HF. The structural properties of the prepared CoxCr-MIL-101 are characterized using

Bubble columns are commonly used as photobioreactors (PBRs) due to their good mixing and mass transfer capabilities. Modification in design and operating parameters are nevertheless needed to intensify volumetric productivity. Thin-gap bubble column can be used in this context to operate with high biomass concentration, up to conditions where the culture becomes non-Newtonian. In the present study

Impinging can improve the combustion efficiency of industrial processes. However, studies on the impinging characteristics of multiple jet flames are lacking. In this study, based on an opposing multi-burner gasifier with diesel fuel, the combustion oscillation characteristics in the impinging zone of a four-burner impinging flame were investigated. The dominant oscillation structure in the impinging

A detailed understanding of the collision dynamics of liquid droplets is relevant to natural phenomena and industrial applications. These droplets could experience temperature changes altering their physical properties, which affect the droplet collisions. As viscosity is one of the relevant physical properties, this study focuses on the effect of temperature on viscosity, with an Arrhenius temperature

Nanotechnology is widely used in medicine, electronics, materials, and energy fields. An important aspect of nanotechnology is its application in enhancing oil and gas recovery. However, the oil displacement mechanism using nanotechnology is complicated. Generally, numerical simulation methods and experiments are used to provide a simple description of the oil displacement mechanism, leading to the

This work explores droplet breakup dynamic and pinch-off for the two-phase flow through a microfluidic T-channel. A mathematical model includes three differential equations that have been solved using the finite element method in the squeezing and dripping regime for a wide range of interfacial tension (0.005<σcd<0.1), viscosity ratio (1<μr<20), flow rate ratios (2

To achieve practical high energy density of Li-S battery, it is crucial to construct high-loading sulfur electrodes. However, the poor mechanical stability and severe shuttle effect of high-loading sulfur cathodes during cycling limit the cycling stability. Herein, a mechanically robust network binder with strong affinity towards polysulfides has been designed to stabilize the high-loading sulfur electrode

A flow-through catalytic membrane micro-reactor (CMR) with Cu/ZnO/Al2O3 nanoparticles immobilized in porous membrane pores has been developed for hydrogen production by methanol steam reforming (MSR). The characteristics for CMR demonstrated Cu/ZnO/Al2O3 nanoparticles with almost 200 nm were successfully in situ immobilized in membrane pores. During MSR for hydrogen production in CMR by flow-through

In this study, we use stereoscopic particle image velocimetry (SPIV) to measure the internal instantaneous flow field of a typical pipe with enhanced heat transfer (a single-start spirally corrugated pipe with a pitch-to-diameter ratio S/D = 2.22) with and without a wall heat flux for Reynolds number ReD = 10000 and 25000. Proper orthogonal decomposition (POD) is used to extract the large-scale structures

Recently developed physics-informed deep learning is regarded as a transformative learning philosophy that has been applied in many scientific domains, but such applications are often limited to simulating relatively simple equations and well-defined physics. Here, we propose a systematic framework that can leverage the capabilities of space decomposition, physics-informed deep learning, and transfer

Ion selective electrodes (ISEs) enable measurements via the build-up of a phase boundary potential at the surface of a sensing membrane. While a framework exists to understand the performance of ISEs in stagnant samples, the influences of fluid flow on ISEs are less studied. We model the transport of ions in solution occurring near interfaces between ISE membranes and aqueous samples when subject to

The mechanism of dehydration of a water-in-oil emulsion is complex and involves the growth of an emulsion of polydispersed water droplets in oil, under an electric field, and their gravitational settling and phase separation. In this work, a simple configuration is chosen to understand the mechanism of this complex process. A population balance-based model is developed to predict the performance of