Bifunctional rhenium–copper nanostructures for intensified and stable ethanol synthesis via hydrogenation of dimethyl oxalate

2020 ◽  
Vol 10 (10) ◽  
pp. 3175-3180
Author(s):  
Zhongnan Du ◽  
Meng Chen ◽  
Xuepeng Wang ◽  
Xingkun Chen ◽  
Xiaoling Mou ◽  
...  
Keyword(s):  
Ethanol Production ◽  
Copper Nanoparticles ◽  
Dimethyl Oxalate ◽  
Stability Performance ◽  
Ethanol Synthesis

Small copper nanoparticles decorated with isolated and clustered oxophilic rhenium species are designed for intensified ethanol production through hydrogenation of dimethyl oxalate with unprecedented stability performance.

Ethanol Synthesis from Dimethyl Oxalate Hydrogenation on Cu/SiO2 Catalyst

2012 ◽  
Vol 550-553 ◽  
pp. 175-178 ◽  
Author(s):  
Wen Wen Guo ◽  
Qian Qian Yin ◽  
Ling Jun Zhu ◽  
Shu Rong Wang
Keyword(s):  
High Activity ◽  
Experimental Results ◽  
New Method ◽  
Dimethyl Oxalate ◽  
Mild Conditions ◽  
Ethanol Synthesis

A new method of sustainable ethanol synthesis by hydrogenating dimethyl oxalate (DMO), which is easily obtained from syngas, over a Cu/SiO2catalyst is proposed based on previous works. The experimental results indicate that the Cu/SiO2catalyst exhibited a high activity under the relative mild conditions of 270°C and 2MPa with ethanol selectivity as high as 88% and extremely high DMO conversion.

Cu Nanoparticles Inlaid Mesoporous Al2O3As a High-Performance Bifunctional Catalyst for Ethanol Synthesis via Dimethyl Oxalate Hydrogenation

ACS Catalysis ◽  
2014 ◽  
Vol 4 (10) ◽  
pp. 3612-3620 ◽  
Author(s):  
Yifeng Zhu ◽  
Xiao Kong ◽  
Xianqing Li ◽  
Guoqiang Ding ◽  
Yulei Zhu ◽  
...  
Keyword(s):  
High Performance ◽  
Bifunctional Catalyst ◽  
Cu Nanoparticles ◽  
Dimethyl Oxalate ◽  
Ethanol Synthesis

scholarly journals Effect of Copper Nanoparticles Dispersion on Catalytic Performance of Cu/SiO2Catalyst for Hydrogenation of Dimethyl Oxalate to Ethylene Glycol

2013 ◽  
Vol 2013 ◽  
pp. 1-6 ◽  
Author(s):  
Yajing Zhang ◽  
Na Zheng ◽  
Kangjun Wang ◽  
Sujuan Zhang ◽  
Jing Wu
Keyword(s):  
Ethylene Glycol ◽  
Copper Nanoparticles ◽  
Photoelectron Spectroscopy ◽  
Sol Gel ◽  
Catalytic Performance ◽  
Bet Surface Area ◽  
X Ray ◽  
Dimethyl Oxalate ◽  
Effect Of Copper ◽  
Average Size

Cu/SiO2catalysts, for the synthesis of ethylene glycol (EG) from hydrogenation of dimethyl oxalate (DMO), were prepared by ammonia-evaporation and sol-gel methods, respectively. The structure, size of copper nanoparticles, copper dispersion, and the surface chemical states were investigated by X-ray diffraction (XRD), transmission electron microscopy (TEM), temperature-programmed reduction (TPR), and X-ray photoelectron spectroscopy (XPS) and N2adsorption. It is found the structures and catalytic performances of the catalysts were highly affected by the preparation method. The catalyst prepared by sol-gel method had smaller average size of copper nanoparticles (about 3-4 nm), better copper dispersion, higher Cu+/C0ratio and larger BET surface area, and higher DMO conversion and EG selectivity under the optimized reaction conditions.

Thermodynamic Analysis of Ethanol Synthesis from Glycerol by Two-Step Reactor Sequence

2016 ◽  
Vol 14 (6) ◽  
pp. 1169-1176 ◽  
Author(s):  
Erick A. Mendoza-Chávez ◽  
Nancy E. Rodríguez-Olalde ◽  
Rafael Maya-Yescas ◽  
Jesús Campos-García ◽  
Jaime Saucedo-Luna ◽  
...  
Keyword(s):  
Ethanol Production ◽  
Thermodynamic Analysis ◽  
Maximum Yield ◽  
Dry Reforming ◽  
List Type ◽  
Ethanol Synthesis

Highlights –Glycerol was dry-reformed to syngas and sequentially utilized for ethanol synthesis –Adding CO2 to the glycerol dry reforming reactor was advantageous for ethanol synthesis –Maximum yield was 1 mole ethanol per mole glycerol at CO2/glycerol ratio≥2 –ethanol synthesis from syngas was dependent on the temperature and CO2/glycerol ratio –Wasted glycerol from biodiesel-manufacturing is suitable for syngas/ethanol production

scholarly journals Transcriptional factor Cat8 is involved in regulation of xylose fermentation in engineered Saccharomyces cerevisiae

2018 ◽  
Vol 22 ◽  
pp. 329-334
Author(s):  
L. S. Dzanaieva ◽  
K. V. Dmytruk ◽  
A. A. Sybirny
Keyword(s):  
Ethanol Production ◽  
Alcoholic Fermentation ◽  
Xylose Fermentation ◽  
Ethanol Yield ◽  
Knock Out ◽  
Coding Regions ◽  
Gene Coding ◽  
Engineered Saccharomyces Cerevisiae ◽  
Deletion Cassette ◽  
Ethanol Synthesis

Aim. The aim of this work is the construction of cat8Δ strain on the base of xylose-fermenting S. cerevisiae strain and evaluation of the xylose fermentation rate. Methods. The CAT8 deletion cassette harboring natNT2 gene flanking with 5’ and 3’ non-coding regions of CAT8 gene has been constructed. After transformation by the cassette the cat8Δ strain was selected on the nourseothricin containing medium. Xylose fermentation experiments of constructed strain was performed in mineral medium supplemented with xylose under oxygen-limited conditions. Results. Xylose-fermenting cat8Δ S. cerevisiae strain has been constructed by homologous recombination of the CAT8 deletion cassette with target sequences in the genome of GS010 strain. The cat8Δ strain possessed increase in ethanol accumulation, ethanol yield, rate of ethanol production and productivity of ethanol synthesis relative to the parental GS010 strain for 9.5, 6, 20 and 12 %, respectively. Conclusions. The mutant of the xylose-fermenting S. cerevisiae strain with knock out of the CAT8 gene coding for transcriptional activator, has been constructed. The cat8Δ mutant showed 9.5 % increase in ethanol production from xylose relative to parental strain. Keywords: alcoholic fermentation, xylose, S. cerevisiae, Cat8.

scholarly journals Nanoparticle Mediated NADPH Regeneration for Enhanced Ethanol Production by EngineeredSynechocystissp. PCC 6803

2019 ◽  
Author(s):  
Rajendran Velmurugan ◽  
Aran Incharoensakdi
Keyword(s):  
Metal Oxide ◽  
Metal Oxides ◽  
Ethanol Production ◽  
Photosynthetic Apparatus ◽  
Direct Regeneration ◽  
Ethanol Conversion ◽  
Light Illumination ◽  
Nadph Regeneration ◽  
Ethanol Synthesis ◽  
Pcc 6803

ABSTRACTThe ethanol synthesis pathway engineeredSynechocystissp. PCC 6803 was used to investigate the influence of metal oxide mediated NADPH regeneration on ethanol synthesis. Among the metal oxides, Fe2O3and MgO showed considerable improvement in growth, chlorophyllacontent and ethanol synthesis. Thein-vitrostudies proved that the selected metal oxides have the potential to regenerate the NADPH under light illumination. The results clearly indicate that the light energy is the key factor for activation of metal oxides and to a less extent light itself has the possibility for direct regeneration of NADPH. Under optimized light intensity and NADP addition, the maximum MgO mediated ethanol production of 5100mg/L, about a 2-fold increase compared to the control, was obtained after 20 days cultivation at 5L level. This study indicates that the efficient NADPH regeneration aided by metal oxide is crucial to improve ethanol productivity inSynechocystissp. PCC 6803.IMPORTANCECyanobacteria are efficient ethanol producing organisms from atmospheric CO2upon engineering of pathway. In cyanobacterial ethanol synthesis pathway, NADPH plays an important role acetaldehyde to ethanol conversion. Here we elucidated the NADPH regeneration through extracellular addition of metal oxides. The metal oxide mediated NADPH regeneration study allows us to dissect the importance of metal oxides in enhancing ethanol production through NADPH regeneration while also providing insight into the regulatory functions of metal oxides in growth, photosynthetic apparatus and various carbon metabolisms.

Thermodynamics Simulation of Ethanol Synthesis via Biomass Gasification

2012 ◽  
Vol 608-609 ◽  
pp. 210-213
Author(s):  
Chun Yu Yan ◽  
Feng Pan ◽  
Cai Xin Li ◽  
Ya Li Li ◽  
Yan Fei Wu ◽  
...  
Keyword(s):  
High Pressure ◽  
Low Temperature ◽  
Ethanol Production ◽  
Synthesis Gas ◽  
Ethanol Yield ◽  
Biomass Gasification ◽  
Co2 Conversion ◽  
Gas Composition ◽  
Reactor Pressure ◽  
Ethanol Synthesis

Based on Aspen Plus software platform, a simulation of ethanol synthesis from biomass-derived synthesis gas processed on the assumption of both physical and thermodynamic equilibrium. The influences of these conditions such as temperature, reactor pressure and the H2 to (CO+CO2) mole ratio in the feed gas on CO and CO2 conversion and ethanol yield were investigated. The results showed that reaction temperature, pressure and synthesis gas composition have the most important effect on ethanol synthesis behavior. In this process, low temperature and high pressure would be advantageous for ethanol production.

Thermodynamic Analysis of Indirect Ethanol Synthesis from Syngas

2012 ◽  
Vol 433-440 ◽  
pp. 457-462
Author(s):  
Ling Jun Zhu ◽  
Shu Rong Wang ◽  
Xin Bao Li ◽  
Qian Qian Yin ◽  
Zhong Yang Luo
Keyword(s):  
Reaction Temperature ◽  
Low Temperatures ◽  
Molar Ratio ◽  
High Alcohol ◽  
Reaction Pressure ◽  
Dimethyl Oxalate ◽  
Temperature And Pressure ◽  
Feed Molar Ratio ◽  
Alcohol Formation ◽  
Ethanol Synthesis

The dependence of chemical equilibrium constant on the reaction temperature and pressure and the feed molar ratio were theoretically calculated for indirect ethanol synthesis from syngas through the coupling of CO with methyl nitrite (MN) to dimethyl oxalate (DMO) and the hydrogenation of DMO to ethanol. It shows that the coupling process and the hydrogenation of DMO to ethanol are highly favorable at all temperatures and pressures, especially at low temperature. The hydrogenation of DMO to ethylene glycol (EG) and the further reaction of ethanol with H2 to high alcohol are thermodynamically favorable at low temperatures, below 630 and 450 K, respectively. Additionally, high reaction pressure is facilitated to EG and high alcohol formation. Accordingly, moderate reaction temperature (up 538 K) and low reaction pressure (below 1 MPa) are beneficial to ethanol production.

Sign in / Sign up

Export Citation Format

Share Document