Reduced Chemical Kinetic Mechanism for a Waste Cooking Oil Biodiesel/n-Pentanol Mixture for Internal Combustion Engine Simulation

Abstract

With increasing pollution concerns and stringent emission regulations, it has become difficult to meet the emission standards with the use of a single fuel. Binary and ternary fuel mixtures are being investigated all over the globe to satisfy the emission norms. In the present work, a reduced reaction mechanism for a waste cooking oil (WCO) biodiesel/n-pentanol mixture is proposed for the chemical kinetic simulation of an internal combustion engine. The mechanism consists of 146 species and 506 reactions. WCO biodiesel and n-pentanol are biofuels with many advantages. WCO biodiesel has properties (cetane number, viscosity, etc.) that are similar to those of diesel fuel, whereas n-pentanol has a high boiling temperature, low heat of vaporization, high lower heating value, and low autoignition temperature compared to other shorter chain alcohols. Mixing of higher molecular weight alcohols (n-pentanol) with diesel/biodiesel lowers the knock resistance as a result of their high reactivity at low as well as high temperatures. This characteristic makes them suitable for a diesel engine and advanced engine combustion modes, such as homogeneous charge compression ignition and reactivity controlled compression ignition engines.

Higher Alcohol and Ether Biofuels for Compression-Ignition Engine Application: A Review with Emphasis on Combustion Kinetics

“…Reduced mechanisms of n -octanol were proposed by Kerschgens et al and Li et al, which have been applied successfully in 3D engine simulations. Reduced kinetic mechanisms were also presented for mixtures of n -pentanol and n -hexanol with other fuels, including biodiesel and primary reference fuel mixtures. ,, …”

“…Reduced kinetic mechanisms were also presented for mixtures of n- pentanol and n-hexanol with other fuels, including biodiesel and primary reference fuel mixtures. 206,219,220 Higher Ethers. The first chemical mechanism for DNBE was constructed by Cai et al 166 by including both low-and high-temperature oxidation kinetics according to the reaction classes of alkanes.…”

Construction of a Reduced Diesel/Polyoxymethylene Dimethyl Ether 3 (PODE3) Reaction Mechanism for Combustion and Emission Analysis

“…Recently, coupling the chemical reaction mechanism into a computational fluid dynamics simulation plays a significant role in understanding the combustion process and designing new engines. − In addition, it is widely accepted that a simplified yet reliable chemical kinetic model could also reflect the major features during the combustion process. , A high-temperature chemical kinetic reaction mechanism for PODE 3 was constructed by Sun et al It has been widely verified with experimental data of burning velocity and laminar premixed flames. The model analysis revealed that a lack of C–C bonds and saturated linear chains with C–O–C bonds leads to significant soot reduction.…”

Experimental investigation on the effects of multiple injections and EGR on n-pentanol–biodiesel fuelled RCCI engine

“…17 The utilization of long-chain alcohols such as n-pentanol has received remarkable attention as an alternate fuel for diesel engines in recent times. 18 Limited literature is available on the effect of neat n-pentanol on the performance, combustion, and emission characteristics in CI engines. It was reported by Lapuerta et al, (2010) 19 that longerchain alcohols are more desirable than short-chain alcohols because of their superior lubricity, energy density, viscosity, and low hygroscopicity.…”