Health & Environmental Research Online (HERO)


Hexanol, 1-,2-ethyl- (2-Ethyl-1-hexanol)


235 References Were Found:

The "refereed" or "peer review" status of a journal comes from the Ulrichsweb Global Serials Directory (http://ulrichsweb.serialssolutions.com/), as supplied by the publisher. The term refers to the system of critical evaluation of manuscripts/articles by professional colleagues or peers. The content of refereed publications is sanctioned, vetted, or otherwise approved by a peer-review or editorial board. The peer-review and evaluation system is utilized to protect, maintain, and raise the quality of scholarly material published in serials. Publications subject to the referee process are assumed, then, to contain higher quality content than those that are not.
Peer Reviewed Journal Article

Biofiltration of airborne VOCs with green wall systems-Microbial and chemical dynamics

Authors: Mikkonen, A; Li, T; Vesala, M; Saarenheimo, J; Ahonen, V; Kärenlampi, S; Blande, JD; Tiirola, M; Tervahauta, A (2018) HERO ID: 4729676

[Less] Botanical air filtration is a promising technology for reducing indoor air contaminants, but the underlying . . . [More] Botanical air filtration is a promising technology for reducing indoor air contaminants, but the underlying mechanisms need better understanding. Here, we made a set of chamber fumigation experiments of up to 16 weeks of duration, to study the filtration efficiencies for seven volatile organic compounds (VOCs; decane, toluene, 2-ethylhexanol, α-pinene, octane, benzene, and xylene) and to monitor microbial dynamics in simulated green wall systems. Biofiltration functioned on sub-ppm VOC levels without concentration-dependence. Airflow through the growth medium was needed for efficient removal of chemically diverse VOCs, and the use of optimized commercial growth medium further improved the efficiency compared with soil and Leca granules. Experimental green wall simulations using these components were immediately effective, indicating that initial VOC removal was largely abiotic. Golden pothos plants had a small additional positive impact on VOC filtration and bacterial diversity in the green wall system. Proteobacteria dominated the microbiota of rhizosphere and irrigation water. Airborne VOCs shaped the microbial communities, enriching potential VOC-utilizing bacteria (especially Nevskiaceae and Patulibacteraceae) in the irrigation water, where much of the VOC degradation capacity of the biofiltration systems resided. These results clearly show the benefits of active air circulation and optimized growth media in modern green wall systems.

The "refereed" or "peer review" status of a journal comes from the Ulrichsweb Global Serials Directory (http://ulrichsweb.serialssolutions.com/), as supplied by the publisher. The term refers to the system of critical evaluation of manuscripts/articles by professional colleagues or peers. The content of refereed publications is sanctioned, vetted, or otherwise approved by a peer-review or editorial board. The peer-review and evaluation system is utilized to protect, maintain, and raise the quality of scholarly material published in serials. Publications subject to the referee process are assumed, then, to contain higher quality content than those that are not.
Peer Reviewed Journal Article

Reaction-Separation-Recycle Processes for 2-Ethylhexyl Acrylate Production: Design, Control, and Economic Evaluation

Authors: Moraru, MD; Bildea, CS (2018) HERO ID: 4353653

[Less] 2-Ethylhexyl acrylate is commercially produced from acrylic acid and 2-ethylhexanol using sulfuric acid . . . [More] 2-Ethylhexyl acrylate is commercially produced from acrylic acid and 2-ethylhexanol using sulfuric acid as catalyst. Employing solid catalysts can eliminate corrosion, increase selectivity, and make easier the separation and product purification. Process development studies for a complete plant have not been reported in the literature. In this paper, the design, control, and economic evaluation of three reaction-separation-recycle processes are developed. The reaction takes place in a fixed-bed reactor using Amberlyst 70 as catalyst. The acrylate is recovered by distillation at the desired purity. One of the processes obtains high-purity wastewater by removing the water in a distillation-decanter system. The other two obtain low-purity water in a flash decanter, and a decanter-only system, respectively. All three processes are controllable, the control system showing robustness when an increase or decrease in production capacity is required, or when the fresh reactants become contaminated. The economic analysis shows attractive economic potential and other key economic indicators.

The "refereed" or "peer review" status of a journal comes from the Ulrichsweb Global Serials Directory (http://ulrichsweb.serialssolutions.com/), as supplied by the publisher. The term refers to the system of critical evaluation of manuscripts/articles by professional colleagues or peers. The content of refereed publications is sanctioned, vetted, or otherwise approved by a peer-review or editorial board. The peer-review and evaluation system is utilized to protect, maintain, and raise the quality of scholarly material published in serials. Publications subject to the referee process are assumed, then, to contain higher quality content than those that are not.
Peer Reviewed Journal Article

Intensification of the Production of 2-Ethyl-Hexyl Acrylate: Batch Kinetics and Reactive Distillation

Authors: Talnikar, VD; Deorukhkar, OA; Katariya, A; Mahajan, YS (2018) HERO ID: 4729661

[Less] The reaction of acrylic acid and 2-ethyl-1 hexanol was explored in this work with the intent of process . . . [More] The reaction of acrylic acid and 2-ethyl-1 hexanol was explored in this work with the intent of process intensification. In order to assess the effect of important parameters on the course of reaction, this work initially conducted batch reactor experiments. Reaction conditions in the batch reactor for a specific conversion (similar to 30 %) were obtained. A kinetic model was then obtained through regression to arrive at a rate expression that is later used in process development. Experiments were performed in the reactive distillation (RD) environment in batch mode, which showed substantial increase in conversion (similar to 80 %) indicating the applicability of RD. Further, this work performed simulation in the RD environment to assess process intensification. Simulations show that it is possible to obtain complete conversion of the acid.

The "refereed" or "peer review" status of a journal comes from the Ulrichsweb Global Serials Directory (http://ulrichsweb.serialssolutions.com/), as supplied by the publisher. The term refers to the system of critical evaluation of manuscripts/articles by professional colleagues or peers. The content of refereed publications is sanctioned, vetted, or otherwise approved by a peer-review or editorial board. The peer-review and evaluation system is utilized to protect, maintain, and raise the quality of scholarly material published in serials. Publications subject to the referee process are assumed, then, to contain higher quality content than those that are not.
Peer Reviewed Journal Article

Effect of surface electrical charge on microbubbles' terminal velocity and gas holdup

Authors: Perez-Garibay, R; Bueno-Tokunaga, A; Estrada-Ruiz, RH; Camacho-Ortegon, LF (2018) HERO ID: 4729662

[Less] The objective of this research was to study the effect of the electrical charge of microbubbles on their . . . [More] The objective of this research was to study the effect of the electrical charge of microbubbles on their terminal velocity when they are conditioned with typical flotation reagents. Some of the contrasting collectors studied were potassium ethyl xanthate (anionic) and dodecylamine (cationic), and the studied frothers were terpinol, methyl-isobutyl-carbinol (MIBC), and 2-ethylhexanol. It was found that the microbubbles' terminal velocity is mainly affected by their diameter, but the electrical charge has a significant effect, as it can change the boundary layer thickness of water surrounding each bubble. This behaviour is explained by considering that the attraction between the potential-determining ions and the counterions [e.g., hydrated proton ( +) and xanthate ()] shrinks and compacts the boundary layer thickness, which can reach high density, decreasing the microbubble terminal velocity. The opposite occurs when the bubble charge has the same sign as the counterions [e.g., hydroxyls () and xanthate ()]; in this case, the diffuse layer and the boundary layer do not grow and the bubble terminal velocity increases.

The "refereed" or "peer review" status of a journal comes from the Ulrichsweb Global Serials Directory (http://ulrichsweb.serialssolutions.com/), as supplied by the publisher. The term refers to the system of critical evaluation of manuscripts/articles by professional colleagues or peers. The content of refereed publications is sanctioned, vetted, or otherwise approved by a peer-review or editorial board. The peer-review and evaluation system is utilized to protect, maintain, and raise the quality of scholarly material published in serials. Publications subject to the referee process are assumed, then, to contain higher quality content than those that are not.
Peer Reviewed Journal Article

Analysis of combustion characteristics, engine performances and emissions of long-chain alcohol-diesel fuel blends

Authors: Suhaimi, H; Adam, A; Mrwan, AG; Abdullah, Z; Othman, MF; Kamaruzzaman, MK; Hagos, FY (2018) HERO ID: 4729663

[Less] Petroleum-based fuels have been one of the most in demand energy source for various purposes and application. . . . [More] Petroleum-based fuels have been one of the most in demand energy source for various purposes and application. However, rigorous emissions from petroleum-based fuels have forced many governments to introduce stringent regulations and concerns over energy security. Alternative fuel such as short-chain alcohol (methanol and ethanol) had been used as an oxygenated element to increase oxygen content in diesel fuel (DF). However, shortchain alcohol-diesel blends have disadvantages such as low cetane number, low heating value, increase of hydrocarbons (HC) and low miscibility with DF. Recently, researchers have shown interest on long-chain alcohols which have better physicochemical properties than short-chain alcohol. In this experiment, 5%, 10% and 20% of 2-ethyl 1-hexanol (2-EH) was added into DF to produce long-chain alcohol-diesel fuel blends. The fuel blends were prepared by using Hielscher UP400S ultrasonic emulsifier machine at 20% Hz stirring speed. The discussion will focus on combustion characteristics, engine performance and exhaust emissions of single cylinder diesel engine YANMAR TF120M at constant engine speed of 1800 rpm under various loads (0%, 25%, 50%, 75%, and 100%). The results show that HE5 has the preeminent properties among fuel blends in terms of calorific value (45.87 MJ/kg), density (806.1 kg/m(3)) and viscosity (3.02 mPa.s). Performance analysis shows BTE had increased by 91.72%, while BSFC had decreased by 45.22% for 5% 2-EH (HE5).

The "refereed" or "peer review" status of a journal comes from the Ulrichsweb Global Serials Directory (http://ulrichsweb.serialssolutions.com/), as supplied by the publisher. The term refers to the system of critical evaluation of manuscripts/articles by professional colleagues or peers. The content of refereed publications is sanctioned, vetted, or otherwise approved by a peer-review or editorial board. The peer-review and evaluation system is utilized to protect, maintain, and raise the quality of scholarly material published in serials. Publications subject to the referee process are assumed, then, to contain higher quality content than those that are not.
Peer Reviewed Journal Article

Measurement and Correlation of the Solubility of Florfenicol Form A in Several Pure and Binary Solvents

Authors: Zhang, P; Zhang, Chi; Zhao, Rui; Wan, Y; Yang, Z; He, R; Chen, Q; Li, Tao; Ren, B (2018) HERO ID: 4729664

[Less] The solubility of florfenicol form A in eight pure organic solvents (propionic acid, ethanol, 1-propanol, . . . [More] The solubility of florfenicol form A in eight pure organic solvents (propionic acid, ethanol, 1-propanol, 1-butanol, 2-propanol, 2-methyl-1-propanol, 3-methyl-1-butanol, and 2-ethyl-1-hexanol) and three binary solvents (dimethyl sulfoxide + ethanol, dimethyl sulfoxide + 1-propanol, and dimethyl sulfoxide + 1-butanol) was measured by a laser dynamic method at temperature from 283.15 to 323.15 K. The experimental results show that the mole fraction solubility of florfenicol in the pure solvents decreased according to the following order: ethanol > 1-propanol > 2-propanol > 1-butanol > 3-methyl-1-butanol > 2-methyl-1-propanol propionic acid > 2-ethyl-1-hexanol. The experimental results show that the mole fraction solubility of florfenicol form A in the binary solvents increased with the increase of temperature and dimethyl sulfoxide mass fraction. The experimental solubility data were well correlated with the four thermodynamic models: modified Apelblat equation, lambda h equation, NRTL model equation, and Wilson model equation. The modified Apelblat model equation was regarded as the best one to fit the experimental values in the pure solvents.

The "refereed" or "peer review" status of a journal comes from the Ulrichsweb Global Serials Directory (http://ulrichsweb.serialssolutions.com/), as supplied by the publisher. The term refers to the system of critical evaluation of manuscripts/articles by professional colleagues or peers. The content of refereed publications is sanctioned, vetted, or otherwise approved by a peer-review or editorial board. The peer-review and evaluation system is utilized to protect, maintain, and raise the quality of scholarly material published in serials. Publications subject to the referee process are assumed, then, to contain higher quality content than those that are not.
Peer Reviewed Journal Article

Performance and emissions of long-chain alcohols as drop-in fuels for heavy duty compression ignition engines

Authors: Preuss, J; Munch, K; Denbratt, I (2018) HERO ID: 4729667

[Less] The experimental research reported in this paper evaluates the potential of blends consisting of different . . . [More] The experimental research reported in this paper evaluates the potential of blends consisting of different biomass derived alcohols and vegetable oils as possible drop-in components in fossil Diesel fuel to overcome the need for modifications in engine hardware or calibration settings. Two C-8-alcohols (n-octanol and its isomer 2-ethylhexanol) and two C-10-alcohols (n-decanol and its isomer 2-propylheptanol) were blended with hydrotreated vegetable oil (HVO), rapeseed methyl ester (RME) and fossil Diesel. The blends were prepared to mimic the properties of standard Diesel fuel, in particular the cetane number was held constant. The percentage of fossil Diesel in the blends was 0%, 10% or 20%. The impact of the fuel composition on performance and emissions in a Volvo D13 single cylinder heavy duty research engine operated with standard engine settings was analyzed.

Experiments revealed that the engine performance with the different blend compositions resembled that with standard Diesel with regard to the indicated thermal efficiency. Owing to the lower heating value of the fuel blends, the specific fuel consumption of the blends was about 6% higher than that of Diesel. Emissions were found to be similar among all alcohol-HVO blends. Compared to Diesel emissions, a reduction of carbon monoxide was measured for the blends. The yields of HC and NOx did not vary significantly for the different fuel blends. Soot emissions were substantially lower compared to those obtained with neat Diesel fuel. The lowest soot emissions were achieved with the fully renewable fuel composition, which did not contain any aromatic structures. Evaluation of the particle size distribution showed that the number of particles in agglomeration mode was substantially higher for standard Diesel fuel than for the blends. Alcohol-HVO-blends particle sizes were mainly in the nucleation mode range. Overall, the obtained results indicate that blends mainly containing long-chain alcohols could be a potential replacement for fossil Diesel fuel.

The "refereed" or "peer review" status of a journal comes from the Ulrichsweb Global Serials Directory (http://ulrichsweb.serialssolutions.com/), as supplied by the publisher. The term refers to the system of critical evaluation of manuscripts/articles by professional colleagues or peers. The content of refereed publications is sanctioned, vetted, or otherwise approved by a peer-review or editorial board. The peer-review and evaluation system is utilized to protect, maintain, and raise the quality of scholarly material published in serials. Publications subject to the referee process are assumed, then, to contain higher quality content than those that are not.
Peer Reviewed Journal Article

A non-invasive approach to explore the discriminatory potential of the urinary volatilome of invasive ductal carcinoma of the breast

Authors: Taunk, K; Taware, R; More, TH; Porto-Figueira, P; Pereira, JAM; Mohapatra, R; Soneji, D; Camara, JS; Nagarajaram, HA; Rapole, S (2018) HERO ID: 4729668

[Less] Worldwide, breast invasive ductal carcinoma (IDC) accounts for the majority of the reported cases of . . . [More] Worldwide, breast invasive ductal carcinoma (IDC) accounts for the majority of the reported cases of this form of cancer. IDC effective management, as for any form of cancer, would greatly benefit from early diagnosis. This, however, due to various socio-economic reasons, is very far for the reality in developing countries like India, where cancer diagnosis is often carried out at late stages when disease management is troublesome. With the present work, we aim to evaluate a simple analytical methodology to identify a set of volatile organic compounds (VOCs) in urine samples, as a biosignature for IDC. Using solid-phase microextraction followed by gas chromatography/mass spectrometry, a panel of 14 urinary VOCs was found to discriminate IDC (n = 65) from a healthy control (HC) group (n = 70) through multivariate statistical treatments. Furthermore, metabolic pathway analysis revealed various dysregulated pathways involved in IDC patients hinting that their detailed investigations could lead to novel mechanistic insights into the disease pathophysiology. In addition, we validated the expression pattern of five of these VOCs namely 2-ethyl-1-hexanol, isolongifolenone, furan, dodecanoic acid, 2-methoxy-phenol in another external cohort of 59 urinary samples (IDC = 32 and HC = 27) and found their expression pattern to be consistent with the primary sample set. To our knowledge, this is the first study exploring breast IDC volatome alterations in Indian patients.

The "refereed" or "peer review" status of a journal comes from the Ulrichsweb Global Serials Directory (http://ulrichsweb.serialssolutions.com/), as supplied by the publisher. The term refers to the system of critical evaluation of manuscripts/articles by professional colleagues or peers. The content of refereed publications is sanctioned, vetted, or otherwise approved by a peer-review or editorial board. The peer-review and evaluation system is utilized to protect, maintain, and raise the quality of scholarly material published in serials. Publications subject to the referee process are assumed, then, to contain higher quality content than those that are not.
Peer Reviewed Journal Article

Biolubricant Production of 2-Ethylhexyl Palmitate by Transesterification Over Unsupported Potassium Carbonate

Authors: Zheng, T; Wu, Z; Xie, Q; Lu, M; Xia, Fan; Wang, G; Nie, Y; Ji, J (2018) HERO ID: 4729669

[Less] Owing to the decrease of global oil price, development of downstream value-added products is important . . . [More] Owing to the decrease of global oil price, development of downstream value-added products is important to biodiesel industry. In this study, we used palmitic acid methyl ester (PAME) as a starting material to produce 2-ethylhexyl palmitate (2-EHP), an environmentally friendly biolubricant product, which was derived from the transesterification of fatty acid methyl esters and long chain fatty alcohols. Conventional synthetic routes of 2-EHP have disadvantages, including high catalyst price, low conversion efficiency, and pollution issues. To solve these problems, in situ transesterification of PAME with 2-ethylhexanol (2-EH) was conducted over unsupported potassium carbonate as heterogeneous catalyst. The optimal reaction temperature, 2-EH to PAME molar ratio, and catalyst to PAME mass ratio were 180 degrees C, 3:1, and 3.0 wt%, respectively. The PAME conversion reached up to 100% within 1 hour under the optimal conditions. In addition, a kinetic model describing the experimental data over a temperature range of 160-180 degrees C was developed. The dependence of kinetic rate constant (k) on temperature was evaluated, and the activation energy (E-a) for the transesterification of PAME with 2-EH was calculated to be 57.04kJmol(-1).

Journal Article
Journal Article

Experimental study on operating conditions of 2-ethylhexanol manufacturing process

Authors: Ghaemi, A; Zerehsaz, MH (2018) HERO ID: 4729670

[Less] In this work, hydrogenation of 2-ethyl-3-propylacrolein (EPA) was investigated experimentally using . . . [More] In this work, hydrogenation of 2-ethyl-3-propylacrolein (EPA) was investigated experimentally using a laboratory-scale plug flow reactor. In this process, 2-ethylhexanol was synthesized using a EPA aldehyde in the presence of vinylpyruvate hydratase catalyst. Next, the effects of operating conditions including temperature, pressure, and species flow rates on its performance were studied within temperature and pressure ranges of 110-160 degrees C and 1-6 bars, respectively. The hydrogen and EPA flow rates were measured to be 150-240ml/h and 0.03-0.11ml/h, respectively. The results showed that the optimum yield of 2-ethylhexanol production is achieved at a temperature of 155 degrees C, the pressure of 4.4 bars, and hydrogen flow rate of 192.4ml/min. Using optimum operating conditions, the process yield was 99.86%, with hydrogen flow rate identified as the most effective parameter on the process yield.