Single Cylinder Spark Ignition Engine Study of the Octane, Emissions, and Fuel Economy Characteristics of Methanol-Gasoline Blends

Johnson, R. T.; Riley, R. K.

doi:10.4271/760377

“…Blend compositions of less than 15% were chosen to capture the nonlinear increase in RON with compression ratio, as the nonlinear effect at higher blend compositions is significantly less. 35 The BRON of ethanol was also estimated using blends of 0% (no ethanol), 6%, and 100% ethanol balanced by nonoxygenated gasoline. An exact composition of the nonoxygenated gasoline used in this study could not be obtained.…”

Section: Methodsmentioning

confidence: 99%

Research Octane Numbers of Primary and Mixed Alcohols from Biomass-Based Syngas

Rapp

¹

,

Mack

²

,

Tschann

³

et al. 2014

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Primary alcohols (ethanol, 1-propanol, 1-butanol, and 1-pentanol) derived from biomass offer a sustainable fuel source that can improve efficiency while reducing carbon dioxide (CO 2 ) emissions. However, the performance of these primary alcohols in spark-ignited engines is relatively unknown. In this paper, the performance of primary alcohols was experimentally determined using the Research Octane Number (RON) and the Blending Research Octane Number (BRON). The primary alcohol mixture, or "AlcoMix," consists of 75% ethanol, 11% 1propanol, 8% 1-butanol, and 6% 1-pentanol, and was approved by the U.S. EPA for use with blending in gasoline. This mixture is the probable outcome of thermochemical conversion of biomass using Fischer-Tropsch chemistry with synthesis gas. The purpose of this research is to determine if AlcoMix is a suitable replacement for Ethanol in fuel blending as an anti-knock blending component for spark-ignited engines. As an indicative measure for knock resistance, the RON of AlcoMix and ethanol were estimated using a modified, validated method in a CFR engine. The anti-knock properties of the AlcoMix as a blending component in gasoline were determined by estimating the BRON. The results show that the measured RON values of the individual primary alcohols closely match published values. Additionally, the RON and BRON of the primary alcohol mixture nearly match those of ethanol. These results indicate that the primary alcohol mixture produced by thermochemical processes could be used as a substitute for ethanol as a primary fuel or as an anti-knock blending component. INTRODUCTION

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“…In order to determine BRON, the biofuels were blended with non-oxygenated gasoline at mixtures of 5%, 10%, and 20% biofuel balanced by non-oxygenated gasoline. The blend compositions were chosen to reflect the nonlinear increase in RON with compression ratio, as the non-linear effect at higher blend compositions is significantly less [17].…”

Section: Fuelsmentioning

confidence: 99%

“…The improvement in octane number that anti-knock fuel additives give to the resulting fuel blend depends on the both the anti-knock fuel additive and the blend composition [16]. One should note that many fuel components in anti-knock fuel additives contribute a non-linear effect when boosting the octane number, especially at low blend compositions [17].…”

Section: Introductionmentioning

confidence: 99%

Investigation of biofuels from microorganism metabolism for use as anti-knock additives

Mack

¹

,

Rapp

²

,

Broeckelmann

³

et al. 2014

Fuel

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This paper investigates the anti-knock properties of biofuels that can be produced from microorganism metabolic processes. The biofuels are rated using Research Octane Number (RON) and Blending Research Octane Number (BRON), which determine their potential as additives for fuel in spark ignition (SI) engines. Tests were conducted using a single-cylinder Cooperative Fuel Research (CFR) engine and performance of the biofuels was compared to primary reference fuels (PRFs). The investigated fuels include 3-methyl-2-buten-1-ol, 3-methyl-3-buten-1-ol, 2-methylpropan-1-ol (isobutanol), and limonene. Results show that 3-methyl-2-buten-1-ol, 3-methyl-3-buten-1-ol, and 2-methylpropan-1-ol (isobutanol) sufficiently improve the anti-knock properties of gasoline.

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“…The improvement in octane number that anti-knock fuel additives give to the resulting fuel blend depends on the both the anti-knock fuel additive and the blend composition [16]. One should note that many fuel components in anti-knock fuel additives contribute a non-linear effect when boosting the octane number, especially at low blend compositions [17].…”

Section: Introductionmentioning

confidence: 99%

Investigation of Biofuels from Microorganism Metabolism for Use as Anti-Knock Additives

Mack¹,

Rapp²,

Broeckelmann³

et al. 2017

Preprint

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This paper investigates the anti-knock properties of biofuels that can be produced from microorganism metabolic processes. The biofuels are rated using Research Octane Number (RON) and Blending Research Octane Number (BRON), which determine their potential as additives for fuel in spark ignition (SI) engines. Tests were conducted using a single-cylinder Cooperative Fuel Research (CFR) engine and performance of the biofuels was compared to primary reference fuels (PRFs). The investigated fuels include 3-methyl-2-buten-1-ol, 3-methyl-3-buten-1-ol, 2-methylpropan-1-ol (isobutanol), and limonene. Results show that 3-methyl-2-buten-1-ol, 3-methyl-3-buten-1-ol, and 2-methylpropan-1-ol (isobutanol) sufficiently improve the anti-knock properties of gasoline.

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Single Cylinder Spark Ignition Engine Study of the Octane, Emissions, and Fuel Economy Characteristics of Methanol-Gasoline Blends

Cited by 16 publications

References 12 publications

Research Octane Numbers of Primary and Mixed Alcohols from Biomass-Based Syngas

Research Octane Numbers of Primary and Mixed Alcohols from Biomass-Based Syngas

Investigation of biofuels from microorganism metabolism for use as anti-knock additives

Investigation of Biofuels from Microorganism Metabolism for Use as Anti-Knock Additives

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