scholarly journals Two-stage process for conversion of synthesis gas to high quality transportation fuels. Quarterly report, 8 June-30 September 1983

1983 ◽  
Author(s):  
J.C.W. Kuo
Keyword(s):  
Synthesis Gas ◽  
High Quality ◽  
Two Stage ◽  
Transportation Fuels ◽  
Stage Process

Conversion of LDPE into transportation fuels by a two-stage process using Ni/Al-SBA-15 as catalyst

2014 ◽  
Vol 16 (3) ◽  
pp. 435-441 ◽  
Author(s):  
J. M. Escola ◽  
D. P. Serrano ◽  
M. Arroyo ◽  
A. Alba
Keyword(s):  
Two Stage ◽  
Transportation Fuels ◽  
Stage Process

ПОВЕРХНОСТНОЕ ДЕФЕКТООБРАЗОВАНИЕ В МОП+-ТРАНЗИСТОРЕ ПРИ ОБЛУЧЕНИИ ГАММА-ЛУЧАМИ С НИЗКОЙ МОЩНОСТЬЮ ДОЗЫ

2020 ◽  
Vol 96 (3s) ◽  
pp. 647-649
Author(s):  
Н.А. Куликов ◽  
В.Д. Попов
Keyword(s):  
Surface Defects ◽  
High Quality ◽  
Two Stage ◽  
Quality Models ◽  
Mos Transistor ◽  
Stage Process

Проведен анализ двухэтапного процесса поверхностного дефектообразования на границе раздела Si-SiO2 в МОП-транзисторе с n-каналом. Получено, что процесс поверхностного дефектообразования описывается тремя экспоненциальными зависимостями. Представлены качественные модели составляющих процесса поверхностного дефектообразования. The paper analyzes a two-stage process of surface defects formation at Si-SiO2 in a MOS-transistor with n-channel. The process of surface defects formation has been described by three exponential dependences. High-quality models of the process components have been presented.

scholarly journals Two-Stage Biodiesel Synthesis from Used Cooking Oil with a High Acid Value via an Ultrasound-Assisted Method

Energies ◽  
2021 ◽  
Vol 14 (12) ◽  
pp. 3703
Author(s):  
Ming-Chien Hsiao ◽  
Wei-Ting Lin ◽  
Wei-Cheng Chiu ◽  
Shuhn-Shyurng Hou
Keyword(s):  
Acid Value ◽  
Molar Ratio ◽  
Optimal Conditions ◽  
Two Stage ◽  
Cooking Oil ◽  
High Acid ◽  
Used Cooking Oil ◽  
Biodiesel Synthesis ◽  
Stage Process ◽  
Ultrasound Assisted

In this study, ultrasound was used to accelerate two-stage (esterification–transesterification) catalytic synthesis of biodiesel from used cooking oil, which originally had a high acid value (4.35 mg KOH/g). In the first stage, acid-catalyzed esterification reaction conditions were developed with a 9:1 methanol/oil molar ratio, sulfuric acid dosage at 2 wt %, and a reaction temperature of 60 °C. Under ultrasound irradiation for 40 min, the acid value was effectively decreased from 4.35 to 1.67 mg KOH/g, which was decreased to a sufficient level (<2 mg KOH/g) to avoid the saponification problem for the subsequent transesterification reaction. In the following stage, base-catalyzed transesterification reactions were carried out with a 12:1 methanol/oil molar ratio, a sodium hydroxide dosage of 1 wt %, and a reaction temperature of 65 °C. Under ultrasound-assisted transesterification for 40 min, the conversion rate of biodiesel reached 97.05%, which met the requirement of EN 14214 standard, i.e., 96.5% minimum. In order to evaluate and explore the improvement of the ultrasound-assisted two-stage (esterification–transesterification) process in shortening the reaction time, additional two-stage biodiesel synthesis experiments using the traditional mechanical stirring method under the optimal conditions were further carried out in this study. It was found that, under the same optimal conditions, using the ultrasound-assisted two-stage process, the total reaction time was significantly reduced to only 80 min, which was much shorter than the total time required by the conventional method of 140 min. It is worth noting that compared with the traditional method without ultrasound, the intensification of the ultrasound-assisted two-stage process significantly shortened the total time from 140 min to 80 min, which is a reduction of 42.9%. It was concluded that the ultrasound-assisted two-stage (esterification–transesterification) catalytic process is an effective and time-saving method for synthesizing biodiesel from used cooking oil with a high acid value.

Temperature-programmed nitridation of monodispersed VOx nanoparticles into nanocrystalline superconducting oxygen-doped vanadium nitride

2021 ◽  
Author(s):  
Khemchand Dewangan ◽  
Dadan Singh ◽  
Sandeep Kumar Singh Patel ◽  
Kamlesh Kumar Shrivas
Keyword(s):  
Thermal Decomposition ◽  
Synthesis Process ◽  
Vanadium Nitride ◽  
High Quality ◽  
Two Stage ◽  
Stage Synthesis ◽  
Temperature Programmed ◽  
Superconducting Applications

A two-stage synthesis process was employed to prepare high-quality nanocrystalline vanadium nitride (VN) for superconducting applications. Firstly, monodispersed amorphous VOx nanoparticles were obtained via thermal-decomposition of vanadium (III) acetylacetonate [V(acac)3]...

Investigation of opto-electronic properties and morphological characterization of magnesium niobate ceramics synthesized by two-stage process

2021 ◽  
Author(s):  
Kakali Sarkar ◽  
Vivek Kumar ◽  
Shashank Bhushan Das ◽  
Manish Kumar ◽  
Rahul Srivastava
Keyword(s):  
Electronic Properties ◽  
Morphological Characterization ◽  
Two Stage ◽  
Magnesium Niobate ◽  
Stage Process

scholarly journals Enzymatic dissociation of clathrin cages in a two-stage process.

1985 ◽  
Vol 260 (18) ◽  
pp. 10044-10049 ◽  
Author(s):  
S L Schmid ◽  
J E Rothman
Keyword(s):  
Two Stage ◽  
Enzymatic Dissociation ◽  
Stage Process

Fabrication of Cu-rich CZTS thin films by two-stage process: Effect of gas flow-rate in sulfurization process

2021 ◽  
Vol 1230 ◽  
pp. 129922
Author(s):  
M.A. Olgar ◽  
A. Altuntepe ◽  
S. Erkan ◽  
R. Zan
Keyword(s):  
Thin Films ◽  
Flow Rate ◽  
Gas Flow ◽  
Gas Flow Rate ◽  
Two Stage ◽  
Sulfurization Process ◽  
Stage Process ◽  
Czts Thin Films

scholarly journals Food behavior change in late-life widowhood: A two-stage process

Appetite ◽  
2015 ◽  
Vol 95 ◽  
pp. 399-407 ◽  
Author(s):  
Elisabeth Vesnaver ◽  
Heather H. Keller ◽  
Olga Sutherland ◽  
Scott B. Maitland ◽  
J.L. Locher
Keyword(s):  
Behavior Change ◽  
Late Life ◽  
Food Behavior ◽  
Two Stage ◽  
Stage Process

High-efficiency CuInSe2 solar cells prepared by the two-stage process

Solar Cells ◽  
1989 ◽  
Vol 27 (1-4) ◽  
pp. 299-306 ◽  
Author(s):  
Bulent M. Basol ◽  
Vijay K. Kapur ◽  
Richard C. Kullberg
Keyword(s):  
Solar Cells ◽  
High Efficiency ◽  
Two Stage ◽  
Stage Process
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