Yang Wang

Tianjin University | tju · School of Chemical Engineering and Technology

Capacitive Deionization (CDI) is an emerging technology for brackish water desalination. Currently, CDI technology lacks practical means of scaling electrodes from the laboratory to pilot plant level for pre-commercial applications. With the aim of solving the scalability issues, we have prepared easy to scale 3D composites using the highly conduct...

Electrochemical capacitor and capacitive deionization store energy through the interface layer formed between electrodes and electrolytes. The crystalline form and surface potential of the oxide electrode can be changed in order to improve the capacitance. By characterizing the surface property and crystalline form of the TiO2 thin-film electrode a...

Design and optimization of electrode materials plays the pivotal role on the performance of capacitive deionization (CDI). Activated carbon (AC) has been a workhorse material for electrode fabrication in capacitive technologies. Several modification methods have been reported with enhanced activity and versatility attributes. Undeniably, tuning and...

Layered double hydroxides (LDHs) have been extensively studied as promising functional nanomaterials owing to their excellent electrochemical activity and tunable chemical composition. In this work, we presented a series of investigations on enhanced interlayer space of LDHs for electrochemical energy and deionization. Firstly, using acetate anions...

Epoxy resins have been widely used in the fields of anti-corrosion and anti-leakage, flame retardants, etc. 2D materials with different structures and characteristics are doped into epoxy resins as nanofillers to achieve enhanced properties and additional functions. Although a lot of studies have been carried out and some reviews have been publishe...

Electrochemical deionization has been regarded as one of the promising water treatment technologies. Here, CoAl‐layered metal oxide nanosheet intercalated by sodium dodecyl sulfate (SDS) with an enhanced interlayer spacing from 0.76 to 1.33 nm is synthesized and used as an anode. The enlarged interlayer spacing provides an enhanced ion diffusion ch...

The transition metal-based layered double hydroxides (LDHs) have been extensively studied as promising electrode materials for battery-type supercapacitors owing to their excellent electrochemical activity and tunable chemical composition. In our work, we firstly built a novel three-dimensional composite with a core-shell structure by self-assembli...

Capacitive deionization is a very promising method for future water desalination. However, desalination capacity and rate limit its wide application. In our study, layered carbon materials and layered double hydroxides with rapid ion transport were investigated to overcome the rate issue. A layered activated carbon was synthesized by carbonizing an...

Wind energy harvester utilizing flow-induced vibration (FIV-WEH) has attracted much attention because of its ability to capture low-speed wind energy. This study is motivated to design a reliable FIV-WEH assembly in a wind farm, and to understand the altered environmental flow and disturbed output performance through large-eddy simulations and wind...

Capacitive deionization is a very promising method for future water desalination. However, desalination capacity and rate limit its wide application. In this study, a layered activated carbon with rapid ion transport was synthesized by carbonizing and activating chestnut inner shell with KOH. The effects of carbonization temperature and the ratio o...

Battery-type supercapacitors have aroused great interest in the field of energy storage devices and nickel cobalt layered double hydroxides (NiCo-LDHs) show great potential as electrode materials. However, the intrinsic low conductivity and possible agglomeration limit a wider application. In this work, a novel three-dimensional composite material...

Capacitive deionization is a promising electrochemical water treatment technology. Activated carbon is commonly used and its corresponding parameters have an important influence on the electrosorption performance. In this work, on account of the mass loadings of the electrodes (the thickness varies from 200 μm to 600 μm), symmetric and asymmetric c...

As a renewable fuel, the application of biomass fuel gets more and more attention. Fire and explosion are the main safety problems in the biomass fuel storage process. The characteristic parameters and kinetic analysis of pyrolysis and combustion are significant to guide the safe storage of biomass fuel. In this work, the thermogravimetric analysis...

The tandem cylinders immersed in an oncoming flow undergo violent flow-induced vibration (FIV). The cylinders with short spans, in the specific conditions of airflow and mass damping, experience the galloping-like but self-limited vibration. It promotes a coupling instability, controlled by the shear layers and wake vortices. The peculiar behavior...

Biomass fuels are expected to play an important role in future energy consumption. Meanwhile, the fire and explosion of biomass are the have-to-face problems in its production, storage, and application process. This work aims to reveal the influence of stacking and ventilation parameters on the smoldering propagation process and provide guidance fo...

The vibration of dip tube in multi-burner gasifier changes the stress at the connection, causing flange seal failures and high temperature gas erosions with heavy economic losses and industrial accidents. This work aims to reveal the dip tube vibration mechanism, with special focus on obtaining the effect of operational parameters on the fatigue dam...

Flow-induced vibration (FIV) is a phenomenon oftentimes occurring in practical situations where flexible cylinders are immersed in an oncoming flow. Understanding the FIV characteristics in different vortex structures plays an important role in vibration control and utilization of engineering structures, such as offshore stacks and blade-less wind...

Capacitive deionization (CDI) is a promising energy-efficient electrochemical water treatment technology and a scalable electrode having high mass loading is an essential imperative to the success of this technology. A thick CDI electrode was constructed by loading activated carbon particles as the electroactive material into a three-dimensional fr...

Electrochemical capacitors and capacitive deionization store energy through the interfacial layer formed between electrodes and electrolytes. TiO 2 thin-film deposited on Si wafers was studied by ellipsometry under controlled humidity to explore the refractive index (dielectric constant) of pore water. The surface potential measured by electrophore...

Capacitive Deionization (CDI) is an emerging technology for brackish water desalination. To achieve scaling electrodes with a commercial mass loading, carbon fiber/felt was employed as framework to build 3D composite electrode. The highly conductive carbon fiber/felt can serve as electron transfer channel and also provide macrostructure while activ...

Design and optimization of electrode materials plays the pivotal role on the performance of capacitive deionization (CDI). Activated carbon (AC) has been a workhorse material for electrode fabrication in capacitive technologies. Several modification methods have been reported with enhanced activity and versatility attributes. Undeniably, tuning and...

With the widespread use of ammonia in the process industry, more and more accidents were caused by ammonia leakage and dispersion. The dispersion of ammonia is determined by its physical properties, release source conditions and atmospheric environment. Full-scale numerical simulation based on CFD theory was carried out to study the dispersion law...

Purpose The purpose of this study is to reveal the interaction behavior between tubes and supports in steam generators and study the fretting wear of tubes in different load conditions. Design/methodology/approach The fretting wear tests were conducted to investigate the fretting wear behavior of the tubes against three kinds of supports: the dril...

This work aimed to investigate the degradation efficiency of waste water with an azo dye, Acid Red 73 (AR73), by persulfate/heat/Fe3O4@AC/ultrasound (US). The introduction of ultrasound into the persulfate/heat/Fe3O4@AC system greatly enhanced the reaction rate because of the physical and chemical effects induced by cavitation. Various parameters s...

A microfluidic device with a sandwich structure is proposed to achieve label-free and size-selective separation of tumor cells from pleural effusion. The sandwich structure is a co-flow system incorporating an initial sample layer, an isolation layer and the target sample layer. The isolation layer is used to provide a size-selective interface betw...

Experimental investigations of the flow-induced vibration (FIV) of flexible multi cylinders in tandem, side-by-side and staggered arrangements were conducted in an atmospheric boundary layer wind tunnel over a wide spacing ratio and incidence angles. All cylinders were cantilever supported and allowed to vibrate in cross-flow and inline directions....

Slender circular section structures with tandem arrangement will vibrate intensely in airflow. This research is conducted on the vibration modes of three tandem cylinders with various spans in the subcritical Reynolds numbers. The vibration modes at various reduced velocities are discussed, indicating that the peaks of displacement are the results...

The interaction between tubes and anti-vibration bars (AVBs) can cause fretting wear of the tubes. The impact-sliding wear caused by random excitation could not be predicted accurately by current models, therefore an energy-based wear model was proposed in this paper to obtain a better prediction. Statistical analysis was established to obtain para...

Towering steel column with supporting frame is a typical equipment in chemical process engineering. Here, displacement restrictors are proposed to restrict the displacement of the towering and slender equipment while making the column to be structurally nonlinear and statically indeterminate. This study investigated on along-wind and cross-wind vib...

The tubes in a heat exchanger, such as a steam generator (SG), are subjected to crossflow, and interaction between tubes and supports can happen, which can cause fretting wear of tubes. Although many experiments and models have been established, some detailed mechanisms are still not sufficiently clear. In this work, more attention is paid to obtai...

Capacitive Deionization (CDI) is an emerging technology for brackish water desalination. So far, very promising electrode materials with excellent performance have been only tested on a small scale, mainly, because of scalability issues. With the desire of finding a stable and easy to scale electrode from an engineering point of view, advances from...

Activated carbon (AC) modification has been intensively studied in order to design carbon electrodes with enhanced electrochemical performance. Hexadecyltrimethylammonium bromide (HDTMA) and Tween 80 were employed for enhancing the surface activity of AC via synergism. The synergistic effects of the mixed surfactants on AC surface activity in the l...

Naturally, the solid liquid interface interaction widely exists. The study of electrode and aqueous solution interface is significant to the application of capacitive deionization as the principal reaction takes place at the interface. This paper focuses on the pure oxide thin-film, TiO 2 , in an aqueous solution concerning the response to solution...

In new design of heat exchangers with high turbulence intensity and low pressure drop in the shell side, parameters or structures beyond the standards may be adopted and failure risk due to fluid induced vibration can increase. As pitch ratio is related with some significant parameters, the range of pitch ratio determines whether the FIV calculatio...

Concentric arrays of tube bundles are applied extensively in heat exchangers at nuclear power plants. Flow induced vibration is one of the main causes of heat exchanger failures. However, there is no corresponding standard and basic parameters in the design code of different countries for concentric arrays of tube bundles. The fluid elastic instabi...

Graphene oxide (GO) contains numerous functional groups that facilitate the intercalation of polar solvents. The properties and applications of GO are closely related to its interlayer spacing. We report on the changes in the interlayer spacing of GO after the adsorption of water molecules and the polar organic solvents C2H6O2 (EG), C3H7NO (DMF), C...

When road tankers or pipelines fail in a city, the released gas generates cloud in street canyons. The toxic heavy gas cloud pollutes the environment and harms the living being's life. The concentration distribution and trail of the cloud are very important parameters for the emergency response. The wind tunnel experiment and the Computational Flui...

Heavy gas dispersion, including gravity settling that causes longstanding high-concentration zones near the ground, has become a popular research topic in recent years. A series of wind tunnel experiments containing complex layouts of building blocks were carried out to illustrate the comprehensive effect of obstacles and environmental factors on h...

Cationic polyacrylamide (CPAM) is added into graphite oxide (GO) suspensions to purify the GO. A proper understanding of the best addition amount of CPAM and the rheological properties of GO/CPAM is important for filtration and the design of pumping systems for transportation. Both experimental and theoretical analyses are carried out with analysis...