scholarly journals Direct photoelectrochemical oxidation of hydroxymethylfurfural on tungsten trioxide photoanodes

RSC Advances ◽  
2021 ◽  
Vol 11 (1) ◽  
pp. 198-202
Author(s):  
Charles R. Lhermitte ◽  
Nukorn Plainpan ◽  
Pamela Canjura ◽  
Florent Boudoire ◽  
Kevin Sivula
Keyword(s):  
Tungsten Trioxide ◽  
Biomass Valorization ◽  
Important Target ◽  
Photoelectrochemical Oxidation ◽  
Solar Powered ◽  
Target Reaction

An important target reaction for solar-powered biomass valorization is the conversion of 2,5-hydroxymethylfurfural (HMF) into key monomers for polyester production.

Photoelectrochemical Oxidation of Glucose on Tungsten Trioxide Electrode for Non-Enzymatic Glucose Sensing and Fuel Cell Applications

2019 ◽  
Vol 166 (8) ◽  
pp. B569-B575 ◽  
Author(s):  
Bingqing Zhang ◽  
Qingsong Zhang ◽  
Lihua He ◽  
Yifu Xia ◽  
Fuhong Meng ◽  
...  
Keyword(s):  
Fuel Cell ◽  
Tungsten Trioxide ◽  
Glucose Sensing ◽  
Photoelectrochemical Oxidation ◽  
Oxidation Of Glucose

Solar water oxidation by TaON-BiVO4 photoanodes functionalized with WO3

2021 ◽  
Author(s):  
Tingting Wei ◽  
Zhanbin Jin ◽  
Fengyan Li ◽  
Zhixia Sun ◽  
Lin Xu
Keyword(s):  
Water Oxidation ◽  
Tungsten Trioxide ◽  
Solar Water ◽  
Solar Powered ◽  
Solar Water Oxidation

Efficient solar-powered water oxidation over the BiVO4-based anodes requires coupling photoactive semiconductors to improve the inferior activity and stability. Herein, we examine how functionalization with coated tungsten trioxide WO3 affects...

Solar-Powered Electricity

1988 ◽  
Author(s):  
Bernard McNelis ◽  
Anthony Derrick ◽  
Michael Starr
Keyword(s):  
Solar Powered

Design and Application of Smart and Electrical Wheelchair and Charging Station for the Disabled Citizen

2020 ◽  
Vol 3 (1) ◽  
pp. 346-353
Author(s):  
Naim Suleyman Tinğ ◽  
Huseyin Ozel ◽  
Lokman Celik ◽  
Enes Ganidagli ◽  
Hilal Akkamis
Keyword(s):  
Smart Home ◽  
Touch Screen ◽  
Direct Access ◽  
Charging Station ◽  
The Disabled ◽  
Solar Powered ◽  
Home Technology ◽  
Smart Home Technology ◽  
Smart Wheelchair ◽  
Design And Application

In this paper, the design and application of smart wheelchair and charging station for disabled citizen is realized. The first stage of the paper is to make the wheelchair used by our disabled citizens able to access smart home technology via the vehicle via touch screen. The ability of citizens with disabilities to call with direct access via touch screen is also in the wheelchair designed. Thanks to the touch screen placed on the vehicle, disabled citizens are provided with the control of smart automation to control many objects such as curtains and doors in the home. In the second part of the paper, a solar powered charging station is designed and installed in order to charge battery powered wheelchairs. In the charging station made a special card reader system and has the charger to charge the card with disabilities to actively and means are provided.

Conversion of fructose into methyl lactate over SnO2/Al2O3 catalystin flow regime

2020 ◽  
pp. 43-47
Author(s):  
S.V. Prudius ◽  
◽  
N.L. Hes ◽  
A.M. Mylin ◽  
V.V. Brei ◽  
...  
Keyword(s):  
Flow Reactor ◽  
Practical Interest ◽  
Dimethyl Acetal ◽  
Racemic Mixture ◽  
Process Conditions ◽  
Impregnation Method ◽  
Aqueous Methanol ◽  
Methyl Lactate ◽  
Al2o3 Catalyst ◽  
Target Reaction

In recent years, numerous researchers have focused on the development of catalytic methods for processing of biomass-derived sugars into alkyl lactates, which are widely used as non-toxic solvents and are the starting material for obtaining monomeric lactide. In this work, the transformation of fructose into methyl lactate on Sn-containing catalyst in the flow reactor that may be of practical interest was studied. The supported Sn-containing catalyst was ob-tained by a simple impregnation method of granular γ-Al2O3. The catalytic ex-periments were performed in a flow reactor at temperatures of 160-190 °C and pressure of 3.0 MPa. The 1.6-9.5 wt.% fructose solutions in 80% aqueous methanol were used as a reaction mixture. It was found that addition to a reac-tion mixture of 0.03 wt.% potassium carbonate leads to the increase in selec-tivity towards methyl lactate on 15% at 100% conversion of fructose. Prod-ucts of the target reaction С6Н12О6 + 2СН3ОН = 2С4Н8О3 + 2Н2О were ana-lyzed using 13C NMR method. The following process conditions for obtaining of 65 mol% methyl lactate yield at 100% fructose conversion were found: use of 4.8 wt.% fructose solution in 80% methanol, 180 °С, 3.0 МПа and a load on catalyst 1.5 mmol C6H12O6/mlcat/h at contact time of 11 minutes. The cata-lyst productivity is 2.0 mmol C4H8O3/mlcat/h and the by-productі are 1,3-dihydroxyacetone dimethyl acetal (20%) and 5-hydroxymethylfurfural (10%). It should be noted that a racemic mixture of L- and D-methyl lactates has been obtained by conversion of D-fructose on the SnO2/Al2O3 catalyst. The SnO2/Al2O3 catalyst was found to be stable for 6 h while maintaining full fruc-tose conversion at 55–70% methyl lactate selectivity. After regeneration the catalyst completely restores the initial activity.

Quantum Mechanical Calculations Suggest That Lignin Polymerization Is Kinetically Controlled

2019 ◽  
Author(s):  
Terry Gani ◽  
Michael Orella ◽  
Eric Anderson ◽  
Michael Stone ◽  
Fikile Brushett ◽  
...  
Keyword(s):  
Plant Cell ◽  
First Principles ◽  
Plant Cell Wall ◽  
Biological Processes ◽  
Plant Cell Walls ◽  
Biomass Valorization ◽  
Effective Strategies ◽  
Radical Coupling ◽  
Kinetically Controlled ◽  
Atomistic Models

Lignin is an abundant biopolymer important for plant function while holding promise as a renewable source of valuable chemicals. Although the lignification process in plant cell walls has been long-studied, a comprehensive, mechanistic understanding on the molecular scale remains elusive. A better understanding of lignification will lead to improved atomistic models of the plant cell wall that could, in turn, inform effective strategies for biomass valorization. Here, using first-principles quantum chemical calculations, we show that a simple model of kinetically-controlled radical coupling broadly rationalizes qualitative experimental observations of lignin structure across a wide variety of biomass types, thus paving the way for predictive, first-principles models of lignification while highlighting the ability of computational chemistry to help illuminate complex biological processes.

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