scholarly journals Improving the Technology of Synthesis Absolutized Bioethanol

2021 ◽  
Author(s):  
Sergiy Kurta ◽  
Khatsevich Olga
Keyword(s):  
Gas Chromatography ◽  
Infrared Spectroscopy ◽  
Diethyl Ether ◽  
Ethyl Alcohol ◽  
Mass Spectroscopy ◽  
Octane Number ◽  
Absolute Ethyl Alcohol

The article describes the technology of synthesis of absolute ethyl alcohol, as well as the types, properties and efficiency of water-withdrawing reagents and types, properties and efficiency of reagents (CaO, tetraethoxytitanium), which chemically bind water and dehydrate ethanol. The composition and properties of the absolutized ethanol were studied using the infrared spectroscopy, mass spectroscopy and gas-chromatography. The octane number of gasoline with the addition of absolutized ethanol together with the combustion activator (diethyl ether) was measured as well. It has been shown that the content of even very small amounts (up to 2%) of the combustion activator in absolutized ethanol results in the increase of the octane number and improves running abilities of gasoline.

Componential Analysis of Esterified Bio-Oil Prepared from Pyrolysis of Rice Stalk

2011 ◽  
Vol 236-238 ◽  
pp. 130-133
Author(s):  
Yao Lu ◽  
Zhi Min Zong ◽  
Fang Jing Liu ◽  
Shou Ze Wang ◽  
Yu Qing ◽  
...  
Keyword(s):  
Gas Chromatography ◽  
Fourier Transform ◽  
Infrared Spectroscopy ◽  
Fourier Transform Infrared Spectroscopy ◽  
Mass Spectroscopy ◽  
Boiling Point ◽  
Abundant Species ◽  
Componential Analysis ◽  
Bio Oil ◽  
Gas Chromatography Mass Spectroscopy

Bio-oil, with high oxygen-containing character, which was prepared from flash pyrolysis of rice stalk powders, was upgraded by the method of catalytic esterification with methanol. The esterified oil was distilled stepwise from 60 °C to 105 °C, and the fractions were analyzed with Fourier transform infrared spectroscopy (FTIR) and gas chromatography/mass spectroscopy (GC/MS) for the distribution of species. It was found that 58% of the components were detected in the fraction of 60 °C-80 °C, with 1,1-dimethoxypropan-2-one was the most abundant species. The residue, in which the boiling point of species were higher than 105 °C were resolved in acetone, and also analyzed with GC/MS. The results showed that phenols are the most abundant species, and following the ketones and hydrocarbons.

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