Thermal degradation kinetics study and thermal cracking of waste cooking oil for biofuel production

Catalytic pyrolysis of coconut oil with Ni/SBA-15 for the production of bio jet fuel

“…Regarding the behavior of the TGA/DTG curves, it was noted that with the increase in the heating rate there were no changes in the behavior of these curves; however, there was a shift to higher maximum temperature. This behavior has been frequently observed in several works reported in the literature, such as Wako and collaborators 65 in their research on the kinetic study of the thermal degradation of rubber seed oil. According to Bouamoud and collaborators, 66 this shift is due to the temperature gradient during the reaction process, which is smaller at low heating rates and larger at a high heating rates, that is, the increase in the heating rate causes a delay in material degradation.…”

“…Two models that are widely used in studies of pyrolysis kinetic parameters of vegetable oils are Kissinger–Akahira–Sunose (KAS) and Ozawa–Flyn–Wall (OFW). The KAS model is based on the Coats–Redfern approximations and is expressed by eqn (5) : 101 …”

Physical Properties of Binary Mixtures of n-Dodecane and Various Ten-Carbon Aromatic Compounds (2-Methyl-1-phenylpropane, 2-Methyl-2-phenylpropane, 2-Phenylbutane, and 1,3-Diethylbenzene): Densities, Viscosities, Speeds of Sound, Bulk Moduli, Surface Tensions, and Flash Points at T = (293.15–333.15) K and 0.1 MPa

“…The use of various compounds in a surrogate fuel mixture is to capture the correct physical and chemical properties and ultimately to model both the physical and chemical processes that occur during combustion in an engine. The aromatic compounds selected for the current work are isomers of butylbenzene, have been found in fuels, and are being investigated for use in surrogates. − When comparing different aromatic compounds, 1,3-diethylbenzene offers the widest range of possible speeds of sound, bulk moduli, surface tension, and viscosity. Its properties in mixtures with n -dodecane deviated from ideal mixture behavior the least.…”

“…Zhang et al performed kinetic studies involving sec -butylbenzene . Biofuel samples have also been found to contain another isomer of butylbenzene, 1,3-diethylbenzene . To understand how various butylbenzene isomers influence physical properties of mixtures, this study measured the density, viscosity, speed of sound, surface tension, and flash point of two-component mixtures containing sec -butylbenzene, tert -butylbenzene, iso -butylbenzene, and 1,3-diethylbenzene.…”

Properties of Binary Mixtures of 2,2,4,6,6-Pentamethylheptane (iso-Dodecane) with iso-Butylbenzene, sec-Butylbenzene, tert-Butylbenzene, or 1,3-Diethylbenzene: Densities, Viscosities, Speeds of Sound, and Isentropic Bulk Moduli in the Temperature Range of 288.15–333.15 K, Surface Tensions at 295 K, and Flash Points at 0.1 MPa

“…In a recent paper, the authors reported on the physical properties of two-component mixtures of iso -butylbenzene, sec -butylbenzene, tert -butylbenzene, or 1,3-diethylbenzene with n -dodecane in the context of surrogate mixtures for various petroleum- or bio-based jet and diesel fuels . The aromatic compounds were chosen for that study because they can represent the 10-carbon aromatic component of fuel in place of n -butylbenzene and they have been the focus of recent fuel studies. − The n -dodecane was chosen because it is commonly used to represent the linear alkane category of compounds found in jet fuel. Another category of compounds used in surrogate mixtures is branched alkanes.…”