Tag: M.W=150-200

Dagaut, Philippe published the artcileEmission of carbonyl and polyaromatic hydrocarbon pollutants from the combustion of liquid fuels: impact of biofuel blending, Formula: C9H18O2, the main research area is carbonyl polyaromatic hydrocarbon biofuel pollutant combustion.

The combustion of conventional fuels (diesel and Jet A-1) with 10-20% vol oxygenated biofuels (ethanol, 1-butanol, Me octanoate, rapeseed oil Me ester (RME), di-Et carbonate, tri(propylene glycol)methyl ether, i.e., CH3(OC3H6)3OH, and 2,5-dimethylfuran (2,5-DMF)) and a synthetic paraffinic kerosene (SPK) was studied. The experiments were performed using an atm. pressure laboratory premixed flame and a four-cylinder four-stroke diesel engine operating at 1500 rpm. Soot samples from kerosene blends were collected above a premixed flame for anal. Polyaromatic hydrocarbons (PAHs) were extracted from the soot samples. After fractioning, they were analyzed by high-pressure liquid chromatog. (HPLC) with UV and fluorescence detectors. C1 to C8 carbonyl compounds (CBCs) were collected at the diesel engine exhaust on 2,4- dinitrophenylhydrazine coated cartridges (DNPH) and analyzed by HPLC with UV detection. The data indicated that blending conventional fuels with biofuels has a significant impact on the emission of both CBCs and PAHs adsorbed on soot. The global concentration of 18 PAHs (1-methyl-naphthalene, 2-methyl-naphthalene, and the 16 U.S. priority EPA PAHs) on soot was considerably lowered using oxygenated fuels, except 2,5-DMF. Conversely, the total carbonyl emission increased by oxygenated biofuels blending. Among them, ethanol and 1-butanol were found to increase considerably the emissions of CBCs.

Journal of Engineering for Gas Turbines and Power published new progress about Biofuels. 111-11-5 belongs to class esters-buliding-blocks, name is Methyl octanoate, and the molecular formula is C9H18O2, Formula: C9H18O2.

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Wang, Zheng published the artcileRuthenium-catalyzed hydrogenation of CO2 as a route to methyl esters for use as biofuels or fine chemicals, Recommanded Product: Methyl decanoate, the main research area is carbon dioxide hydrogenation methyl ester ruthenium catalyst.

A novel robust diphosphine-ruthenium(II) complex has been developed that can efficiently catalyze both the hydrogenation of CO2 to methanol and its in situ condensation with carboxylic acids to form Me esters; a TON of up to 3260 is achievable for the CO2 to methanol step. Both aromatic and aliphatic carboxylic acids can be transformed to their corresponding Me esters with high conversion and selectivity (17 aliphatic and 18 aromatic examples). On the basis of a series of experiments, a mechanism has been proposed to account for the various steps involved in the catalytic pathway. More importantly, this approach provides a promising route for using CO2 as a C1 source for the production of biofuels, fine chems. and methanol.

Chemical Science published new progress about Biofuels. 110-42-9 belongs to class esters-buliding-blocks, name is Methyl decanoate, and the molecular formula is C11H22O2, Recommanded Product: Methyl decanoate.

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Rasulov, Suleiman M. published the artcileHigh-temperature and high-pressure density and liquid-vapor phase transition properties of methyl octanoate as main biofuel component, Safety of Methyl octanoate, the main research area is methyl octanoate temperature pressure density liquid vapor phase transition.

Thermodn. properties of compressed fuels as d. at liquids phase (PρT data) and two liquids-gas phases as saturated pressure, d., and temperature (PS,ρS,TS) are extremely important for engine performance as well as the transportation and storage of fuels. In this work single – and two-phase PρT data and liquid + gas phase equilibrium properties (PS,TS,ρS) of Me octanoate (caprylate) as one of the key components of biofuels have been studied. The measurements were performed along 15 liquid and vapor isochores between (44.7 and 832.0) kg·m-3 over a temperature range from (298 to 438) K at pressures up to 17.33 MPa using a constant-volume piezometer technique. The study was concentrated in the two-phase region to accurately determine vapor-pressures and in the immediate vicinity of the phase-transition temperatures to precisely determine the phase boundary properties (PS,ρS,TS) on the liquid + gas equilibrium curve. In the low temperature range (far from the critical point) where the values of vapor-pressure are negligible small (<1 kPa, approx. at temperatures below 350 K), the saturated vapor phase of Me octanoate was considered as ideal gas with volume of VG = RT/PS and ΔVLG ≈ VG = RT/PS, where the saturated liquid volume can be neglected, VG > > VL. This approach was used to simplify the calculation of the thermodn. properties of Me octanoate at saturation

Fuel published new progress about Biofuels. 111-11-5 belongs to class esters-buliding-blocks, name is Methyl octanoate, and the molecular formula is C9H18O2, Safety of Methyl octanoate.

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Kass, Michael D. published the artcileCompatibility of Biologically Derivable Alcohols, Alkanes, Esters, Ketones, and an Ether as Diesel Blendstocks with Fuel System Elastomers, SDS of cas: 110-42-9, the main research area is compatibility biol derivable alc alkanes ester ketone ether diesel.

The compatibility of 11 bioderivable diesel blendstocks with 17 elastomer materials common to fuel storage, dispensing, and delivery systems was evaluated though volume and hardness measurements. The blendstocks included two alcs. (1-octanol and 1-nonanol), two acid esters (Me decanoate and hexyl hexanoate), tri(propylene glycol) Me ether (TPM), butylcyclohexane, two ketones (2-nonanone and 2-pentanone), biodiesel, and renewable diesel. Each blendstock was blended with diesel in concentrations of 0, 10, 20, and 30 wt %. The elastomers included two fluorocarbons, six acrylonitrile butadiene rubbers (NBRs), and one each of fluorosilicone, neoprene, polyurethane, styrene butadiene rubber (SBR), hydrogenated acrylonitrile butadiene rubber (HNBR), a blend of NBR and PVC (OZO), epichlorohydrin/ethylene oxide (ECO), ethylene propylene diene monomer (EPDM), and silicone. Specimens of each elastomer material were immersed in the test fuels for a period of 4 wk and measured for volume and hardness. Afterward, they were dried at 60°C for 20 h and remeasured. The results showed that the alkanes, esters, and alcs. were suitable with many of the elastomers. For some materials, such as neoprene, these blendstocks improved the compatibility compared to neat diesel. In contrast, the ketones and TPM produced unsuitable volume expansion (>30%) and softening in many of the elastomers including the high-performance fluoroelastomers. Anal. of the results showed that the swelling behavior is predominantly due to polarity of the elastomer and test fuels.

Energy & Fuels published new progress about Biofuels. 110-42-9 belongs to class esters-buliding-blocks, name is Methyl decanoate, and the molecular formula is C11H22O2, SDS of cas: 110-42-9.

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Liu, Zhong-Qiu published the artcileCatalytic hydroconversion of Yiwu lignite over solid superacid and solid superbase, Category: esters-buliding-blocks, the main research area is lignite solid superacid superbase catalytic hydroconversion.

Trifluoromethanesulfonic acid supported on attapulgite powder (TFMSA/AP) and Mg2Si/γ-Al2O3 were facilely prepared by impregnating TFMSA onto AP and Mg2Si onto γ-Al2O3. The extraction residue from Yiwu lignite (YLER) was subjected to non-catalytic hydroconversion (NCHC) and catalytic hydroconversion (CHC) over TFMSA/AP and Mg2Si/γ-Al2O3, resp. Detailed mol. compositions of the soluble portions from the NCHC (SPNCHC) and CHC over TFMSA/AP (SPCHC-A) and Mg2Si/γ-Al2O3 (SPCHC-B) were characterized with a gas chromatograph/mass spectrometer. As a result, the yields of SPCHC-A and SPCHC-B are 19.6% and 17.5%, resp., which are much higher than that of SPNCHC (1.04%), suggesting that both TFMSA/AP and Mg2Si/γ-Al2O3 show excellent activity for the CHC of YLER. Arenes and arenols are predominant in SPCHC-A and SPCHC-B, resp., while large amounts of alkanoates were detected in SPNCHC. The results indicate that TFMSA/AP effectively catalyzes the cleavage of Car-Calk and Calk-O bridged bonds (BBs) in YLER, while Mg2Si/γ-Al2O3 significantly promotes the cleavage of C-O BBs in YLER. Di(1-naphthyl)methane, 1-methylnaphthalene, oxydibenzene, and benzyloxybenzene were used as coal-related model compounds (CRMCs) for the CHC to further explore the catalysis of TFMSA/AP and Mg2Si/γ-Al2O3. The results show that TFMSA/AP not only releases mobile H+ but also heterolytically splits H2 to form an immobile H- and a mobile H+, leading to the cleavage of Calk-Car and Calk-O BBs in the CRMCs. In contrast, Mg2Si/γ-Al2O3 facilitates heterolytically splitting H2 to an immobile H+ and a mobile H-, resulting in the cleavage of C-O BBs in the CRMCs.

Fuel published new progress about Catalysts. 123-29-5 belongs to class esters-buliding-blocks, name is Ethyl nonanoate, and the molecular formula is C11H22O2, Category: esters-buliding-blocks.

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Chen, Yao published the artcileMicrowave-assisted hydrodistillation extraction based on microwave-assisted preparation of deep eutectic solvents coupled with GC-MS for analysis of essential oils from clove buds, Application In Synthesis of 140-11-4, the main research area is microwave hydrodistillation gas chromatog mass spectrometry oil clove bud.

In recent years, deep eutectic solvents (DESs) as green and sustainable solvents have been widely used in the effective extraction of natural products. Usually, DESs are synthesized by heating and stirring method which takes a long time and energy. In this case, a microwave assisted preparation technique was used to form DESs for saving time and energy. And the DESs as pretreatment solvents were combined with microwave-assisted hydrodistillation (MAHD) for the extraction of essential oils (EOs) from the clove buds in this work. The maximum essential oils yield of 4.60% was obtained with the microwave power of 600 W, the pretreatment time of 5 min and the hydrodistillation time of 40 min using a deep eutectic solvent composed of choline chloride and lactic acid (molar ratio with 1:2). In addition, the essential oil was analyzed by gas chromatog.-mass spectrometry (GC-MS), a total of 40 compounds were identified. Compared with MAHD, water-based MAHD and traditional hydrodistillation (HD), the content and composition of essential oil extracted by DES-based MAHD were higher. Thus, the combination of deep eutectic solvents with a microwave-assisted technique in this study provided an eco-friendly way of extracting essential oils.

Sustainable Chemistry and Pharmacy published new progress about Cell wall. 140-11-4 belongs to class esters-buliding-blocks, name is Benzyl acetate, and the molecular formula is C9H10O2, Application In Synthesis of 140-11-4.

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Guo, Ziwei published the artcileHighly selective conversion of natural oil to alcohols or alkanes over a Pd stabilized CuZnAl catalyst under mild conditions, Recommanded Product: Methyl decanoate, the main research area is conversion natural oil alc alkanes production.

A novel and green catalytic system based on a Pd stabilized CuZnAl catalyst was designed for one-pot conversion of natural oil components to the corresponding alcs. or long-chain linear and branched alkanes with high selectivity and atom economy. When Me decanoate was used as the model compound, a nearly full yield of n-decanol was obtained at 200 °C and 2 MPa H2 within 8 h. 100% Decane was produced when acidic HZSM-5 was introduced under the same reaction conditions, and the selectivity of n-decane and i-decane could be tuned by temperature Cu species were verified as the active sites for lipid conversion, while a small amount of Pd could stabilize the catalyst to avoid Cu leaching. The reaction pathway involved hydrogenation, where Me decanoate can be equivalently converted to methanol and decanol or decane, and no extra CO2 or CO from decarboxylation or decarbonylation was detected. This system increases the sustainability and economy of natural oil conversion to valuable liquid fuel and chems.

Green Chemistry published new progress about Chemicals. 110-42-9 belongs to class esters-buliding-blocks, name is Methyl decanoate, and the molecular formula is C11H22O2, Recommanded Product: Methyl decanoate.

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Vannoni, Lorenzo published the artcileDisclosing the chemistry of oil curing by mass spectrometry using methyl linoleate as a model binder, Application In Synthesis of 111-11-5, the main research area is mass spectrometry methyl linoleate model binder oil curing.

The structure of the polymeric fraction in an oil painting is believed to be strongly connected to the stability of the paint layers over time, but its mol. characterization is extremely difficult given the complex composition of a vegetable oil-based polymer. In this study we report the implementation of a methodol. approach for the systematic mass spectrometric investigation of the mol. features of the products of oxidative degradation and crosslinking of oil paint layers upon curing. The approach is based on the use of Me linoleate as a simplified model of an oil paint binder. Gas-chromatog. coupled with mass spectrometry, solid phase microextraction gas chromatog. mass spectrometry, flow injection electrospray mass spectrometry and evolved gas anal. mass spectrometry, are used to analyze the evolution of compounds produced over seven months of natural ageing, from the volatile products to the macromol. and cross-linked fractions. The aim is to improve our fundamental mol. understanding of the curing process of oil paints, and to investigate the balance between oxidative degradation and crosslinking when specific binder-pigment combinations are in place. Model paint layers were prepared using lead white and ultramarine blue as pigments. These two pigments are known to produce paint layers with different stability over time. The use of Me linoleate as model oil binder greatly simplifies the mass spectral features of the lipid paint fraction, enabling the detection of products of oxidation and crosslinking with a new high level of mol. detail. Data clearly show that crucial differences between paints containing the two pigments establish with time, which are mostly related to the cross-linked fraction.

Microchemical Journal published new progress about Chemistry. 111-11-5 belongs to class esters-buliding-blocks, name is Methyl octanoate, and the molecular formula is C9H18O2, Application In Synthesis of 111-11-5.

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Trinklein, Timothy J. published the artcileDetermination of the signal-to-noise ratio enhancement in comprehensive three-dimensional gas chromatography, HPLC of Formula: 110-42-9, the main research area is signal noise ratio enhancement three dimensional gas chromatog.

We investigate the extent to which comprehensive three-dimensional gas chromatog. (GC3) provides a signal enhancement (SE) and a signal-to-noise ratio enhancement (S/NRel) relative to one-dimensional (1D)-GC. Specifically, the SE is defined as the ratio of the tallest 3D peak height from the GC3 separation to the 1D peak height from the unmodulated 1D-GC separation A model is proposed which allows the analyst to predict the theor. attainable SE (SET) based upon the peak width and sampling d. inputs. The model is validated via comparison of the SET to the exptl. measured SE (SEM) obtained using total-transfer GC3 (100% duty cycle for both modulators) with time-of-flight mass spectrometry detection. Two exptl. conditions were studied using the same GC3 column set, differing principally in the modulation period from the 1D to 2D columns: 4 s vs. 8 s. Under the first set of conditions, the average SEM was 97 (±22), in excellent agreement with the SET of 97 (±18). The second set of conditions improved the average SEM to 181 (±27), also in agreement with the average SET of 176 (±26). The average S/NRel following correction for the mass spectrum acquisition frequency was 38.8 (±11.2) and 59.0 (±27.2) for the two sets of conditions. The enhancement in S/N is largely attributed to moving the signal to a higher frequency domain where the impact of “”low frequency”” noise is less detrimental. The findings here provide strong evidence that GC3 separations can provide enhanced detectability relative to 1D-GC and comprehensive two-dimensional gas chromatog. (GCxGC) separations

Analytical Chemistry (Washington, DC, United States) published new progress about Cryostats. 110-42-9 belongs to class esters-buliding-blocks, name is Methyl decanoate, and the molecular formula is C11H22O2, HPLC of Formula: 110-42-9.

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Trinklein, Timothy J. published the artcileDetermination of the signal-to-noise ratio enhancement in comprehensive three-dimensional gas chromatography, Related Products of esters-buliding-blocks, the main research area is signal noise ratio enhancement three dimensional gas chromatog.

We investigate the extent to which comprehensive three-dimensional gas chromatog. (GC3) provides a signal enhancement (SE) and a signal-to-noise ratio enhancement (S/NRel) relative to one-dimensional (1D)-GC. Specifically, the SE is defined as the ratio of the tallest 3D peak height from the GC3 separation to the 1D peak height from the unmodulated 1D-GC separation A model is proposed which allows the analyst to predict the theor. attainable SE (SET) based upon the peak width and sampling d. inputs. The model is validated via comparison of the SET to the exptl. measured SE (SEM) obtained using total-transfer GC3 (100% duty cycle for both modulators) with time-of-flight mass spectrometry detection. Two exptl. conditions were studied using the same GC3 column set, differing principally in the modulation period from the 1D to 2D columns: 4 s vs. 8 s. Under the first set of conditions, the average SEM was 97 (±22), in excellent agreement with the SET of 97 (±18). The second set of conditions improved the average SEM to 181 (±27), also in agreement with the average SET of 176 (±26). The average S/NRel following correction for the mass spectrum acquisition frequency was 38.8 (±11.2) and 59.0 (±27.2) for the two sets of conditions. The enhancement in S/N is largely attributed to moving the signal to a higher frequency domain where the impact of “”low frequency”” noise is less detrimental. The findings here provide strong evidence that GC3 separations can provide enhanced detectability relative to 1D-GC and comprehensive two-dimensional gas chromatog. (GCxGC) separations

Analytical Chemistry (Washington, DC, United States) published new progress about Cryostats. 111-11-5 belongs to class esters-buliding-blocks, name is Methyl octanoate, and the molecular formula is C9H18O2, Related Products of esters-buliding-blocks.

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics