Developed Mathematical Model for SAPO-34 Core-Shell Adsorbents in the Adsorption Process of CO2from Natural Gas

Tetraethylenepentamine-functionalized core–shell structured nanomagnetic Fe3O4 polymers (TEPA-Fe3O4-NMPs) with different amounts of magnetic core were synthesized and fully characterized. The magnetic core might favor mass transfer accelerating the adsorption process.

Download Full-text

Mathematical Model of Energy Storage in Gas Hydrate and its Flow in Pipeline Systems

10.2118/afrc-2569613-ms ◽

2016 ◽

Author(s):

Oluwatoyin Akinsete ◽

Sunday Isehunwa

Keyword(s):

Mathematical Model ◽

Natural Gas ◽

Gas Hydrate ◽

Storage Capacity ◽

Hydrate Formation ◽

Momentum Conservation ◽

Gas Pipeline ◽

Energy Needs ◽

Pipeline Systems ◽

And Storage

ABSTRACT Natural gas, one of the major sources of energy for the 21st century, provides more than one-fifth of the worldwide energy needs. Storing this energy in gas hydrate form presents an alternative to its storage and smart solution to its flow with the rest of the fluid without creating a difficulty in gas pipeline systems due to pressure build-up. This study was design to achieve this situation in a controlled manner using a simple mathematical model, by applying mass and momentum conservation principles in canonical form to non-isothermal multiphase flow, for predicting the onset conditions of hydrate formation and storage capacity growth of the gas hydrate in pipeline systems. Results from this developed model shows that the increase in hydrate growth, the more the hydrate storage capacity of gas within and along the gas pipeline. The developed model is therefore recommended for management of hydrate formation for natural gas storage and transportation in gas pipeline systems.

Download Full-text

Z-Manoeuvring of a Liquified Natural Gas Carrier with Podded Propulsion System

Jurnal Teknologi ◽

10.11113/jt.v66.2501 ◽

2014 ◽

Vol 66 (2) ◽

Author(s):

Jaswar Jaswar ◽

N. Loh ◽

Adhy Prayitno

Keyword(s):

Mathematical Model ◽

Natural Gas ◽

Propulsion System ◽

Simulation Program ◽

Important Concern ◽

Evaluation Stage ◽

Simulation Results

The application of pod propulsion has become an important concern in designing a new LNG carrier due to the high maneuverability characteristic. However, podded propulsion LNG carrier is a new concept which is still in the evaluation stage. Practically, the maneuverability of podded propulsion LNG carrier is an uncertainty. Hence, it is essential to assess the ship’s maneuvering characteristics. Z-Manoeuvre assessment is one of the recommended tests for maneuverability prediction. This paper discusses on Z-Manoeuvre characteristic of the podded propulsion LNG carrier. A mathematical model for podded propulsion LNG carrier was presented and a simulation program was developed for the Z-Manoeuvre assessment. Finally, simulations were carried out on both conventional propulsion and podded propulsion LNG carriers. The simulation results show that podded propulsion LNG carrier has a better Z-Manoeuvre characteristic.

Download Full-text

A magnetic γ-Fe2O3@PANI@TiO2 core–shell nanocomposite for arsenic removal via a coupled visible-light-induced photocatalytic oxidation–adsorption process

Nanoscale Advances ◽

10.1039/d0na00171f ◽

2020 ◽

Vol 2 (5) ◽

pp. 2018-2024 ◽

Cited By ~ 4

Author(s):

Yuan Wang ◽

Ping Zhang ◽

Tian C. Zhang ◽

Gang Xiang ◽

Xinlong Wang ◽

...

Keyword(s):

Visible Light ◽

Photocatalytic Oxidation ◽

Adsorption Process ◽

Arsenic Removal ◽

Core Shell

A magnetic γ-Fe2O3@PANI@TiO2 nanocomposite acts as an efficient photocatalyst coupled with adsorption for arsenic removal. It could achieve a good capacity of As(iii) removal under visible light.

Download Full-text

Core-shell Fe3O4@zeolite NaA as an Adsorbent for Cu2+

Materials ◽

10.3390/ma13215047 ◽

2020 ◽

Vol 13 (21) ◽

pp. 5047

Author(s):

Jun Cao ◽

Peng Wang ◽

Jie Shen ◽

Qi Sun

Keyword(s):

Adsorption Capacity ◽

Adsorption Process ◽

Core Shell ◽

X Ray Diffraction ◽

X Ray ◽

Ph Values ◽

Transmission Electron ◽

Monolayer Adsorption ◽

Zeolite Naa ◽

Infrared Spectrometer

Here, using Fe3O4@SiO2 as a precursor, a novel core-shell structure magnetic Cu2+ adsorbent (Fe3O4@zeolite NaA) was successfully prepared. Several methods, namely X-ray diffraction (XRD), Fourier transform infrared spectrometer (FTIR), Transmission electron microscope (TEM), Brunauer Emmett Teller (BET) and vibrating sample magnetometry (VSM) were used to characterize the adsorbent. A batch experiment was conducted to study the Cu2+ adsorption capacity of Fe3O4@zeolite NaA at different pH values, contact time, initial Cu2+ concentration and adsorbent does. It is found that the saturated adsorption capacity of Fe3O4@zeolite NaA on Cu2+ is 86.54 mg/g. The adsorption isotherm analysis shows that the adsorption process of Fe3O4@zeolite NaA to Cu2+ is more consistent with the Langmuir model, suggesting that it is a monolayer adsorption. Adsorption kinetics study found that the adsorption process of Fe3O4@zeolite NaA to Cu2+ follows the pseudo-second kinetics model, which means that the combination of Fe3O4@zeolite NaA and Cu2+ is the chemical chelating reaction. Thermodynamic analysis shows that the adsorption process of Fe3O4@zeolite NaA to Cu2+ is endothermic, with increasing entropy and spontaneous in nature. The above results show that Fe3O4@zeolite NaA is a promising Cu2+ adsorbent.

Download Full-text