Papers by Keyword: Ethanol

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Authors: Xin Xin Zhang, Li Min Xi, Hong Yan Yu, Han Gui Wu
Abstract: The paper discusses the disposal of kitchen garbage by means of comprehensive utilization. The method includes four steps: pretreatment of kitchen garbage; preparation of biodiesel from oil-phase by transesterification; Rhizopus oryzae TZY1 and Saccharomyces cerevisiae TZY0 were co-inoculated into water-phase for fuel ethanol production; preparation of protein feed from solid residue of fermentation. Advantage of the method is to make good use of the kitchen garbage, simplify the disposal process, with good prospects for industrial utilization.
Authors: Qian Dai, Hua Ye Guan
Abstract: According to the detailed chemical kinetic mechanism of ethanol proposed by the U.S.Lawrence Livermore Laboratory, this paper analyzes the main approach of ethanol oxidation. Based on the detailed chemical kinetics mechanism, a skeletal chemical reaction mechanism is presented by reaction path analysis.Thus a simplified model is constructed, which consists of 26 species and 26 reactions.And then the comparative studies were given between the simplified model and the detailed model.The simulation results show that simplified model and detailed model have good consistency.
Authors: Ching Song Jwo, Chien Chih Chen, Ho Chang, Sih Li Chen, Chi Hsiang Lin
Abstract: This research carries out an inexpensive, rapid and novel exercise, which is applied to perform the photocatalyst decomposition effectiveness of Methanol and Ethanol in gaseous form. The major devices of this applicable measurement developed by this practice are only utilizing ultraviolet-visible spectrophotometer and quartz cuvette, and the experimental procedures are straightforward and speedy. In the conduct experiments, Methanol and Ethanol with a specific concentration is initially injected into an enclosed quartz cuvette. Then the cuvette is put in ultraviolet- visible spectrophotometer to measure the Methanol and Ethanol concentration, so as to obtain an unique UV absorbance spectrum at its particular concentration. In the conduct experiments of measuring photocatalyst decomposition efficiency, the self-made (SANSS) nanocatalyst TiO2 is initially coated in the quartz plate, and put into the quartz. Then a specific concentration of methanol alcohol and ethanol is injected into the quartz cuvette under the UV irradiation exposure, so as to carry out photodecomposition of Methanol and Ethanol experiment. After that, the cuvettes are then put into the ultraviolet-visible spectrophotometer for measuring the absorbance intensity of UV spectrums in order to produce degradation chart. The preliminary results point out that the self-made nanocatalyst TiO2 has exceptionally outstanding decomposition efficiency which further points out the fact that, when UV irradiation for 60minutes, the gaseous Methanol can be reduced to 3.8% of the original sample, and the gaseous Ethanol can be reduced to 6% of the original sample. But when exercising with commercial nanocatalyst TiO2 to undergo the same process exactly under the same circumstances, the residue gaseous concentration can only be reduced to 17% and 16% of the gaseous Methanol and Ethanol original sample.
Authors: Wei Wei Du, Qing Qing Yue, Ying Wang, Ya Ning Xu, Jian Qing Wang
Abstract: The main objective was to develop a technique by high performance liquid chromatography to study migration of contamination from packaging material of three samples of paper cups with different properties. Dibutyl phthalate (DBP) and benzophenone (BP), which are the most commonly used in paper packaging material, are regarded as stimulant of contamination, alcohol is selected as food stimulant.The obtained data indicated that migration has a relationship with the type of contamination,concentration of food stimulant.Analysed by1stOptsoftware with experimental result, the rule of migration of DBP and BP can be studied.
Authors: Naruemon Intarat, Krit Somnuk, Thanansak Theppaya, Gumpon Prateepchaikul
Abstract: In Thailand, the ethanol production was produced from factory fermentation of many food crops such as sugar cane, molasses, and cassava. Thus, this alcohol is not required to be imported from abroad. Moreover, the advantages of ethanol over methanol are less toxic, and the fatty acid ethyl ester (FAEE) has higher heat content, cetane number and lower cloud point, pour point than the fatty acid methyl esters (FAME). In this study, the 95% commercial ethanol (as a low-grade ethanol) was used to reduce the acid value in the mixed crude palm oil (MCPO). The Response surface methodology (RSM), a 5-level 2-factor central composite design (CCD), was employed to optimize the ethanol, and sulfuric acid. The results showed that the 95% ethanol can reduced the acid value from 34.5 mgKOH/g to less than 2 mgKOH/g. Therefore, the esterified oil can be used to produce biodiesel by base-catalyzed transesterification when the optimal condition: 81.3 vol.% ethanol, 10 vol.% sulfuric acid, and 75°C reaction temperature are used. Moreover, the acid value in MCPO was sharply reduced to less than 7.477 mgKOH/g at 5 min, and to less than 1.621 mgKOH/g after 30 min of reaction time when the model of optimal condition was verified.
Authors: Rojanee Homchalee, Sirawadee Arunyanart, Weerapat Sessomboon
Abstract: This paper aims to analyze ethanol supply chain in Thailand. The analysis covered three main parts: supply chain structure, material flow and related costs in supply chain. The results showed that Thai ethanol supply chain is complex because it involves many stakeholders in both public and private agencies. Molasses and cassava are the main feedstocks of ethanol production in Thailand, so the upstream suppliers of ethanol supply chain are sugarcane and cassava farmers, and the collectors. The feedstocks cost of ethanol plants is high due to the fluctuation of sugarcane and cassava price. There is also a trade barrier to control both production and transportation of ethanol because it under the Liquor Act. Moreover, the distribution of ethanol has low efficiency and long distance of truck transport contribute to high transportation cost. Consequently, logistics system of Thai ethanol supply chain should be improved more efficient in order to support demand expansion of ethanol industry.
Authors: Li Sheng Wang, Peng Fei Wang, Shan Shan Huang, Zhi Liang Jiang
Abstract: In pH 8.4 Tris-HCl buffer solutions, the alcohol dehydrogenase (ADH) catalyzed the reaction between ethanol and nicotinamide adenine dinucleotide (NAD) to produce acetaldehyde. The acetaldehyde reduce HAuCl4 to form gold particles, and the excess HAuCl4 have enhancement effect on the chemiluminescence reaction of luminol-H2O2. The excess HAuCl4 decreased when ethanol increased, and the chemiluminescence value decreased. Accordingly we can utilize the chemiluminescence to detect the content of ethanol indirectly. The decreased chemiluminescence value (ΔI) was proportional to the ethanol concentration (C) from 0.017 to 5.10 mmol/L, with a regression equation of ΔI = 2374.3C+280.1, and a detection limit of 2.3 μmol/L. This proposed method was applied to detect ethanol in saliva samples of drunk, with satisfactory results
Authors: Cheng Jun Wang, De Yun Zeng, Shan Shan Gong, Qi Sun
Abstract: Treatment of 1,2-phenylenediamines and 3-(N-phenyl-N-methyl) aminoacrolein with ZrCl4 as catalyst in refluxing 95% ethanol afforded unexpected 2H-benzimidazole derivatives as the major products. It was determined that the formation of 2H-benzimidazoles was not from the decomposition of the 2-aminovinyl benzimidazoles.
Authors: Man Jian Wu, Wu Yao, Wei Wang, Yong Qi Wei
Abstract: A new method involving the extraction of various ions from hardened cement pastes by anhydrous ethanol is presented to determine the pH value and ionic concentration during the first 28 days. The volume content of pore solution extracted by ethanol in the leachate reached 12% or above and the pH values calculated by alkali ions are more than 12, even up to 12.73. The results were compared with those from parallel, conventional pore water expression experiments. All of these comparisons verified the feasibility of the proposed method. However, the application of this method to pore solution analysis needs further improvement.
Authors: Xiao Ming Xing, Wu Yao
Abstract: A simple method is presented to extract the pore solution of hardened cement pastes during the first 28 days and to measure the pH value, which is dependent on anhydrous-ethanol extraction (AEE) and improved by the assistance of ultrasonic vibration generator. The results were compared with the pore water expression (PWE) and anhydrous ethanol extraction through observing the variation tendency of pH values along with time and different water-cement ratios (w/c). The study showed that as w/c decreased, the pH value had a rising tendency; the density of [OH-] extracted by ultrasonic-ethanol extraction (UEE) method is 4-5 times higher than that by AEE method, which indicates the feasibility of UEE method.
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