High Efficient Separation of Olefin from FCC Naphtha: Separation Mechanism and Universal Simulation Method

In this study, nanocrystalline ZnNdxFe2−xO4 ferrites with x = 0.0, 0.01, 0.03 and 0.05 were fabricated and used as a catalyst for dye removal potential. The effect of Nd3+ ions substitution on the structural, optical and photo-Fenton activity of ZnNdxFe2−xO4 has been investigated. The addition of Nd3+ ions caused a decrease in the grain size of ferrites, the reduction of the optical bandgap energies and thus could be well exploited for the catalytic study. The photocatalytic activity of the ferrite samples was evaluated by the degradation of Rhodamine B (RhB) in the presence of H2O2 under visible light radiation. The results indicated that the ZnNdxFe2−xO4 samples exhibited higher removal efficiencies than the pure ZnFe2O4 ferrites. The highest degradation efficiency was 98.00%, attained after 210 min using the ZnNd0.03Fe1.97O4 sample. The enhanced photocatalytic activity of the ZnFe2O4 doped with Nd3+ is explained due to the efficient separation mechanism of photoinduced electron and holes. The effect of various factors (H2O2 oxidant concentration and catalyst loading) on the degradation of RhB dye was clarified.

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Automatic Dissolution Testing with High-Temporal Resolution for Both Immediate-Release and Fixed-Combination Drug Tablets

Scientific Reports ◽

10.1038/s41598-019-53750-w ◽

2019 ◽

Vol 9 (1) ◽

Cited By ~ 2

Author(s):

Zhongmei Chi ◽

Irfan Azhar ◽

Habib Khan ◽

Li Yang ◽

Yunxiang Feng

Keyword(s):

High Speed ◽

Sequential Analysis ◽

Immediate Release ◽

Drug Dissolution ◽

High Temporal Resolution ◽

Dissolution Profile ◽

Dissolution Testing ◽

Combination Drug ◽

Efficient Separation ◽

High Efficient

AbstractDissolution testing plays many important roles throughout the pharmaceutical industry, from the research and development of drug products to the control and evaluation of drug quality. However, it is a challenging task to perform both high-efficient separation and high-temporal detection to achieve accurate dissolution profile of each active ingredient dissolved from a drug tablet. In our study, we report a novel non-manual-operation method for performing the automatic dissolution testing of drug tablets, by combining a program-controlled sequential analysis and high-speed capillary electrophoresis for efficient separation of active ingredients. The feasibility of the method for dissolution testing of real drug tablets as well as the performance of the proposed system has been demonstrated. The accuracy of drug dissolution testing is ensured by the excellent repeatability of the sequential analysis, as well as the similarity of the evaluation of dissolution testing. Our study show that the proposed method is capable to achieve simultaneous dissolution testing of multiple ingredients, and the matrix interferences can be avoided. Therefore it is of potential valuable applications in various fields of pharmaceutical research and drug regulation.

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High efficient separation of U(VI) and Th(IV) from rare earth elements in strong acidic solution by selective sorption on phenanthroline diamide functionalized graphene oxide

Chemical Engineering Journal ◽

10.1016/j.cej.2017.09.038 ◽

2018 ◽

Vol 332 ◽

pp. 340-350 ◽

Cited By ~ 36

Author(s):

Fuhai Li ◽

Zheng Yang ◽

Hanqin Weng ◽

Geng Chen ◽

Mingzhang Lin ◽

...

Keyword(s):

Graphene Oxide ◽

Rare Earth ◽

Rare Earth Elements ◽

Acidic Solution ◽

Functionalized Graphene ◽

Functionalized Graphene Oxide ◽

Selective Sorption ◽

Efficient Separation ◽

High Efficient

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A solid-analytical-based model for extracting cutter-workpiece engagement in 5-axis flank machining

MATEC Web of Conferences ◽

10.1051/matecconf/201823701009 ◽

2018 ◽

Vol 237 ◽

pp. 01009

Author(s):

Dongdong Li ◽

Weimin Zhang ◽

Tengfei Shang ◽

Tianhong Gao ◽

Shuo Liu ◽

...

Keyword(s):

Material Removal ◽

Tool Path ◽

Removal Rate ◽

Cutting Tools ◽

Simulation Method ◽

Flank Milling ◽

Milling Force ◽

3D Space ◽

High Efficient ◽

Cam Software

5-axis flank milling is applied extensively in aerospace, die-molds, and automotive industries because of high efficient material removal rate. Commercial CAM software can only simulate the tool path and collision at present, but cannot handle with cutting force during cutting process due to the variable geometrical cutter workpiece engagement (CWE) region of 5-axis milling. This paper presents a novel solid analytical model for extracting the CWE maps. The CWE is obtained analytically by performing Boolean operations between the cutter and in-process-workpiece (IPW) at any given cutter location (CL) point, instead of using the cutter and the removal volume. The proposed process simulation method could identify the CWE efficiently and precisely for general cutting tools. Finally, the CWE boundaries are mapped from a 3D space into a 2D plane defined by the immersion angle and the axial depth of a given cutter. The proposed solution can be easily integrated into the CAM software for predicting milling force and optimizing parameters in 5-axis milling.

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Phase Behaviour of Cellulose Nanocrystal Dispersion in Aqueous Sulphuric Acid and Development of an Energy Efficient Separation Technique for the Acid-Cellulose Nanocrystal System

Defect and Diffusion Forum ◽

10.4028/www.scientific.net/ddf.371.59 ◽

2017 ◽

Vol 371 ◽

pp. 59-72

Author(s):

Soon Yee Liew ◽

Wim Thielemans ◽

Buddhika Hewakandamby

Keyword(s):

Sulphuric Acid ◽

Energy Efficient ◽

Volume Fraction ◽

Extraction Process ◽

Phase Behaviour ◽

Cellulose Nanocrystal ◽

Separation Mechanism ◽

Acid Solutions ◽

Efficient Separation ◽

Hydrolysis Of

In this paper, the phase behaviour of a cellulose nanocrystal (CNCs) dispersion in sulphuric acid solutions was investigated, aimed at the development of an energy efficient separation method for this mixture. The system in consideration was a mixture of 30 wt% aqueous sulphuric acid (ρl = 1219 kg/m3) containing 12.6 mg/ml of cellulose nanocrystals (CNCs) (ρs = 1590 kg/m3, volume fraction of CNCs less than 1%). This volume filling mixture was obtained directly from a CNC extraction process, as obtained after the hydrolysis of cotton using 64 wt% sulphuric acid at ca. 45 ̊C for 45 minutes (this condition was required for the extraction of CNCs from cotton) followed by quenching the hydrolysis with water. The CNCs form the desired product and need to be separated from the acid that can then be recycled. Conventionally this separation has been difficult and requires a large input of energy. This work addresses this problem by investigating into the phase behaviour and physicochemical and hydrodynamic character of this mixture. This understanding led to the development of a very energy efficient separation mechanism for this mixture, which is 5 orders of magnitude more energy efficient than the most widely used centrifugation systems.

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New challenge of metal–organic frameworks for high-efficient separation of hydrogen chloride toward clean hydrogen energy

Journal of Materials Chemistry A ◽

10.1039/c4ta06832g ◽

2015 ◽

Vol 3 (10) ◽

pp. 5275-5279 ◽

Cited By ~ 11

Author(s):

Jia Liu ◽

Wei Xia ◽

Weijun Mu ◽

Peizhou Li ◽

Yanli Zhao ◽

...

Keyword(s):

Molecular Dynamic ◽

Hydrogen Chloride ◽

Metal Organic Frameworks ◽

Energy Resource ◽

Molecular Dynamic Simulations ◽

Hydrogen Energy ◽

Dynamic Simulations ◽

Efficient Separation ◽

High Efficient ◽

Metal Organic

Eleven metal–organic frameworks are used for H2/HCl separation by real breakthrough experiment and molecular dynamic simulations, affording clean hydrogen energy resource with purity >99.997% from chlor-alkali industry exhaust.

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Study on Flow Resistance and Filtration Efficiency of the Carbonized Micron Wood Fiber DPF

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.458.224 ◽

2010 ◽

Vol 458 ◽

pp. 224-230 ◽

Cited By ~ 1

Author(s):

Yan Ma ◽

Xiu Rong Guo ◽

C.M. Yang ◽

D.F. Du

Keyword(s):

Numerical Simulation ◽

Ultrafine Particles ◽

Flow Resistance ◽

Wood Fiber ◽

Filter Material ◽

Simulation Method ◽

Low Flow ◽

Bench Test ◽

Numerical Simulation Method ◽

High Efficient

Airborne particulate matter is known for its environmental impact and is suspected of causing adverse health effects. Especially the role of ultrafine particles smaller than 0.1μm, which amongst others are emitted by diesel engines, is the subject of current health related discussions. In order to solve this problem, many filtration methods have been researched, while so far the results are unsatisfactory. In this paper, a method of utilizing the carbonized micron wood fiber (CMWF) as the filter material is presented and a corresponding numerical simulation method is applied. Furthermore, a kind of detachable DPF is developed, a diesel engine bench test is conducted and the influence elements upon Δp/H are researched. Theory and test prove that the numerical simulation method can be consistent with the test very well and the CMWF DPF has not only the low flow resistance and high efficient filtration but also very suitable for diesel exhaust gas purification.

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Monocyclic Aromatic Compounds Detection with High Field Asymmetry Waveform Ion Mobility Spectrometry

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.538-541.2159 ◽

2012 ◽

Vol 538-541 ◽

pp. 2159-2163

Author(s):

Cong Zhao ◽

Chi Lai Chen ◽

Dian Ling Wang ◽

Ran Chen ◽

You Jiang Liu ◽

...

Keyword(s):

High Resolution ◽

Ion Mobility Spectrometry ◽

Ion Mobility ◽

Aromatic Compounds ◽

High Field ◽

Environmental Contaminants ◽

Detection Threshold ◽

Efficient Separation ◽

High Efficient ◽

The Relationship

Monocyclic aromatic compounds (MAC) are one kind of the major organic environmental contaminants. In this paper, with self-made high Field Asymmetry waveform Ion Mobility Spectrometry (FAIMS) system, the high resolution and sensitivity detection of typical MAC has been carried out. By analyzing the relationship between the Dispersion Voltages (DV) and Compensation Voltages (CV), the second and fourth order nonlinear ion mobility coefficients of Chlorobenzene, O-dichlorobenzene, P-dichlorobenzene, M-cresol, P-nitrophenol, Benzyl alcohol and O-Toluidine are obtained. The spectra of nonlinear ion mobility and the FAIMS spectra of seven kinds of MAC are acquired, and the high efficient separation of these substance ions are realized. As high as 0.95 of linearity and about 20 ppb detection threshold for chlorobenzene are also demonstrated by linear regression. These results show that FAIMS is an effective method to detect the MAC and has great potential for field detection of organic environmental contaminants.

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