Pentanol

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María Dolores Saquete - One of the best experts on this subject based on the ideXlab platform.

Vicente Gomis - One of the best experts on this subject based on the ideXlab platform.

Yu Zhang - One of the best experts on this subject based on the ideXlab platform.

  • experimental investigation on the effect of n Pentanol blending on spray ignition and combustion characteristics of waste cooking oil biodiesel
    Energy Conversion and Management, 2017
    Co-Authors: Ronghua Huang, Sheng Huang, Yu Zhang, Zhaowen Wang
    Abstract:

    Abstract Due to their excellent physicochemical properties, biodiesel and n-Pentanol are regarded as two promising alternative biofuels for automobile. However, the fundamental data of spray and combustion characteristics of n-Pentanol/biodiesel blends are still scarce. The objective of this work is to investigate the effects of n-Pentanol addition to waste cooking oil (WCO) biodiesel in different ratios (0%, 20%, and 40% in volume) on spray, ignition and combustion characteristics in a constant volume combustion bomb (CVCB). Ignition and combustion tests were performed at five ambient temperatures (800, 900, 1000, 1100 and 1200 K) with three oxygen concentration (10%, 15% and 21%), and spray tests were conducted at the same temperature ranges but with no oxygen involved to prevent combustion happening. The result shows liquid length decreases with increase of ambient temperature, and the falling slope increases significantly with the blended n-Pentanol concentration. The liquid length of B60P40 is about 6% longer than that of B100 at 800 K condition, while it becomes about 10% shorter than B100 when ambient temperature rises to 1200 K. Although the cetane number of n-Pentanol is much less than biodiesel, an increase of n-Pentanol ratio has a promoting effect on the ignition event under most conditions. Under these conditions, addition of 40% n-Pentanol has cut the ignition delay of biodiesel, on average, by 30.2%. The natural flame luminosity is found to be reduced significantly with an increasing n-Pentanol ratio, meaning that addition of n-Pentanol could reduce the soot level under all conditions. For example, the time integrated natural luminosity (TINL) of B60P40 is only 41.2% of that of B100 under 1000 K temperature conditions. The result also suggests that, for multi-component fuels, flame lift-off length (FL) is the most reliable factor that influence the soot concentration level under spray combustion processes, rather than ignition delay or soot formation time. Overall, blending n-Pentanol into biodiesel has a great soot oxidation potential and could maintain suitable ignition phase at the same time.

  • Ignition and combustion characteristics of n-Pentanol–diesel blends in a constant volume chamber
    Applied Energy, 2017
    Co-Authors: Sheng Huang, Ronghua Huang, Yu Zhang
    Abstract:

    Abstract Pentanol is considered as one of the most promising alternative biofuels due to its excellent physicochemical properties. The objective of this work was to compare the ignition and combustion characteristics of different n-Pentanol/diesel blends in an optical constant volume combustion chamber. The tested fuels included 20% (D80P20) and 40% (D60P40) of n-Pentanol blended with diesel in volume, and pure diesel (D100). Broadband chemiluminescence technique was used to measure the timing and location of spray ignition. A high-speed CCD camera with two ND8 dimmer lenses was used to capture the incandescence radiated from the soot particles during combustion. A wide range of experimental conditions was investigated. The ambient temperature ranged from 800 K to 1200 K and the oxygen concentration ranging from 10% to 21%, covering both the conventional and low temperature combustion regimes. The results show that pure diesel has shorter ignition delay and distance comparing to Pentanol blends. A larger blending proportion of Pentanol D60P40 advances the ignition phase more than the D80P20 in low oxygen concentration conditions. Due to the fuel-borne oxygen and the dilution effect, the natural flame luminosity is reduced significantly with the increase of Pentanol ratio in most conditions except under the intermediate temperature region of 1000 K. In that condition, the shorter ignition delay and flame lift-off length of Pentanol blends cause a slightly increase in the natural flame luminosity. The natural flame luminosity images showed that the oxygen-contained structure of Pentanol could accelerate soot oxidation under all conditions. This indicates that Pentanol blends could decrease final soot emissions in internal combustion engines.

  • ignition and combustion characteristics of n Pentanol diesel blends in a constant volume chamber
    Applied Energy, 2017
    Co-Authors: Sheng Huang, Ronghua Huang, Yu Zhang
    Abstract:

    Abstract Pentanol is considered as one of the most promising alternative biofuels due to its excellent physicochemical properties. The objective of this work was to compare the ignition and combustion characteristics of different n-Pentanol/diesel blends in an optical constant volume combustion chamber. The tested fuels included 20% (D80P20) and 40% (D60P40) of n-Pentanol blended with diesel in volume, and pure diesel (D100). Broadband chemiluminescence technique was used to measure the timing and location of spray ignition. A high-speed CCD camera with two ND8 dimmer lenses was used to capture the incandescence radiated from the soot particles during combustion. A wide range of experimental conditions was investigated. The ambient temperature ranged from 800 K to 1200 K and the oxygen concentration ranging from 10% to 21%, covering both the conventional and low temperature combustion regimes. The results show that pure diesel has shorter ignition delay and distance comparing to Pentanol blends. A larger blending proportion of Pentanol D60P40 advances the ignition phase more than the D80P20 in low oxygen concentration conditions. Due to the fuel-borne oxygen and the dilution effect, the natural flame luminosity is reduced significantly with the increase of Pentanol ratio in most conditions except under the intermediate temperature region of 1000 K. In that condition, the shorter ignition delay and flame lift-off length of Pentanol blends cause a slightly increase in the natural flame luminosity. The natural flame luminosity images showed that the oxygen-contained structure of Pentanol could accelerate soot oxidation under all conditions. This indicates that Pentanol blends could decrease final soot emissions in internal combustion engines.

  • spray and evaporation characteristics of n Pentanol diesel blends in a constant volume chamber
    Energy Conversion and Management, 2016
    Co-Authors: Sheng Huang, Ronghua Huang, Yu Zhang
    Abstract:

    Abstract Due to its excellent physicochemical property and renewable characters, Pentanol is considered to be one of the most promising alternative biofuels applying to mobile vehicles. The objective of this study is to reveal the effects of Pentanol addition to diesel in different ratios (0%, 20%, and 40% in volume) on the spray and evaporation characteristics under various injection and ambient conditions. The experiments were conducted in a premixed combustion heated constant volume combustion chamber with two different optical arrangements, high-speed schlieren technique and diffused back-illumination technique. The result shows pure diesel has a longer spray tip penetration and a smaller cone angle compared to Pentanol blends under non-vaporizing conditions. With the increasing of ambient density, the difference of penetration characteristic between each blend becomes negligible but the gap of spray angle is still distinct. Compared to non-vaporizing condition, there is a downward trend for spray tip penetration of pure diesel under high temperature above 800 K while an increase trend for Pentanol blends. The spray cone angles are unaffected by ambient temperature except increasing the blend ratio of Pentanol to 40%. Air entrainment analysis such as spray volume and fuel equivalence ratio distribution were obtained by measured and model predicted respectively. The result shows pure diesel has a poor air-fuel mixing compared to Pentanol blends. It also warned that the risk of liquid impingement on the wall becomes higher when the Pentanol blend ratio reaches 40% at low temperature combustion conditions.

  • Spray and evaporation characteristics of n-Pentanol–diesel blends in a constant volume chamber
    Energy Conversion and Management, 2016
    Co-Authors: Sheng Huang, Ronghua Huang, Yu Zhang
    Abstract:

    Abstract Due to its excellent physicochemical property and renewable characters, Pentanol is considered to be one of the most promising alternative biofuels applying to mobile vehicles. The objective of this study is to reveal the effects of Pentanol addition to diesel in different ratios (0%, 20%, and 40% in volume) on the spray and evaporation characteristics under various injection and ambient conditions. The experiments were conducted in a premixed combustion heated constant volume combustion chamber with two different optical arrangements, high-speed schlieren technique and diffused back-illumination technique. The result shows pure diesel has a longer spray tip penetration and a smaller cone angle compared to Pentanol blends under non-vaporizing conditions. With the increasing of ambient density, the difference of penetration characteristic between each blend becomes negligible but the gap of spray angle is still distinct. Compared to non-vaporizing condition, there is a downward trend for spray tip penetration of pure diesel under high temperature above 800 K while an increase trend for Pentanol blends. The spray cone angles are unaffected by ambient temperature except increasing the blend ratio of Pentanol to 40%. Air entrainment analysis such as spray volume and fuel equivalence ratio distribution were obtained by measured and model predicted respectively. The result shows pure diesel has a poor air-fuel mixing compared to Pentanol blends. It also warned that the risk of liquid impingement on the wall becomes higher when the Pentanol blend ratio reaches 40% at low temperature combustion conditions.

Sakthivel Rajamohan - One of the best experts on this subject based on the ideXlab platform.

  • Assessment of n-Pentanol/Calophyllum inophyllum/diesel blends on the performance, emission, and combustion characteristics of a constant-speed variable compression ratio direct injection diesel engine
    Environmental Science and Pollution Research, 2018
    Co-Authors: Purnachandran Ramakrishnan, Ramesh Kasimani, Mohamed Shameer Peer, Sakthivel Rajamohan
    Abstract:

    Alcohol is used as an additive for a long time with the petroleum-based fuels. In this study, the higher alcohol, n -Pentanol, was used as an additive to Calophyllum inophyllum (CI) biodiesel/diesel blends at 10, 15, and 20% by volume. In all blends, the ratio of CI was maintained at 20% by volume. The engine characteristics of the Pentanol fuel blends were compared with the diesel and CI20 ( Calophyllum inophyllum 20% and diesel 80%) biodiesel blend. The nitrogen oxide (NO) emission of the Pentanol fuel blends showed an increased value than CI20 and neat diesel fuel. The carbon dioxide (CO_2) also increased with increase in Pentanol addition with the fuel blends than CI20 fuel blend and diesel. The carbon monoxide (CO) and hydrocarbon (HC) emissions were decreased with increase in Pentanol proportion in the blend than the CI20 fuel and diesel. The smoke emission was reduced and the combustion characteristics of the engine were also improved by using Pentanol blended fuels. From this investigation, it is suggested that 20% Pentanol addition with the biodiesel/diesel fuel is suitable for improved performance and combustion characteristics of a diesel engine without any engine modifications, whereas CO_2 and NO emissions increased with addition of Pentanol due to effective combustion.

  • assessment of n Pentanol calophyllum inophyllum diesel blends on the performance emission and combustion characteristics of a constant speed variable compression ratio direct injection diesel engine
    Environmental Science and Pollution Research, 2018
    Co-Authors: Purnachandran Ramakrishnan, Ramesh Kasimani, Mohamed Shameer Peer, Sakthivel Rajamohan
    Abstract:

    Alcohol is used as an additive for a long time with the petroleum-based fuels. In this study, the higher alcohol, n-Pentanol, was used as an additive to Calophyllum inophyllum (CI) biodiesel/diesel blends at 10, 15, and 20% by volume. In all blends, the ratio of CI was maintained at 20% by volume. The engine characteristics of the Pentanol fuel blends were compared with the diesel and CI20 (Calophyllum inophyllum 20% and diesel 80%) biodiesel blend. The nitrogen oxide (NO) emission of the Pentanol fuel blends showed an increased value than CI20 and neat diesel fuel. The carbon dioxide (CO2) also increased with increase in Pentanol addition with the fuel blends than CI20 fuel blend and diesel. The carbon monoxide (CO) and hydrocarbon (HC) emissions were decreased with increase in Pentanol proportion in the blend than the CI20 fuel and diesel. The smoke emission was reduced and the combustion characteristics of the engine were also improved by using Pentanol blended fuels. From this investigation, it is suggested that 20% Pentanol addition with the biodiesel/diesel fuel is suitable for improved performance and combustion characteristics of a diesel engine without any engine modifications, whereas CO2 and NO emissions increased with addition of Pentanol due to effective combustion.

Francisco Ruiz - One of the best experts on this subject based on the ideXlab platform.