scholarly journals Photoelectrochemical Conversion of Methane into Value-Added Products

Catalysts ◽  
2021 ◽  
Vol 11 (11) ◽  
pp. 1387
Author(s):  
Adeel Mehmood ◽  
Sang Youn Chae ◽  
Eun Duck Park
Keyword(s):  
Methane Conversion ◽  
Value Added ◽  
Reaction Pathways ◽  
Semiconductor Materials ◽  
Detailed Mechanism ◽  
Co Catalysts ◽  
External Bias ◽  
Conversion Of Methane ◽  
Conversion System ◽  
Value Added Products

Methane has been reported to be directly converted into value-added products through various methods. Among them, photoelectrochemical (PEC) methane conversion is considered an eco-friendly method because it utilizes solar light and is able to control the selectivity to different products by means of application of an external bias. Recently, some PEC methane conversion systems have been reported, but their performance efficiencies are relatively lower than those of other existing thermal, photocatalytic, and electrochemical systems. The detailed mechanism of methane activation is not clear at this stage. In this review, various catalytic materials and their roles in the reaction pathways are summarized and discussed. Furthermore, promising semiconductor materials, co-catalysts, and oxidants have also been proposed. Finally, direct and indirect pathways in the design of the PEC methane conversion system have been discussed.

The Catalyzed Conversion of Methane to Value‐Added Products

2020 ◽  
Vol 8 (8) ◽  
pp. 1900665 ◽  
Author(s):  
Guangyu Zhao ◽  
Matthew Drewery ◽  
John Mackie ◽  
Tim Oliver ◽  
Eric Miles Kennedy ◽  
...  
Keyword(s):  
Value Added ◽  
Conversion Of Methane ◽  
Value Added Products

scholarly journals Microbial Transformation of Sesquiterpenoids

2009 ◽  
Vol 4 (8) ◽  
pp. 1934578X0900400 ◽  
Author(s):  
Haq N Bhatti ◽  
Muhammad Zubair ◽  
Nasir Rasool ◽  
Zahid Hassan ◽  
Viqar U Ahmad
Keyword(s):  
Natural Products ◽  
Biological Activity ◽  
New Products ◽  
Microbial Transformation ◽  
Value Added ◽  
Reaction Pathways ◽  
Agricultural Chemicals ◽  
Remote Sites ◽  
Pharmaceutical Industries ◽  
Value Added Products

Biotransformations are useful methods for producing medicinal and agricultural chemicals from both active and inactive natural products with the introduction of chemical functions into remote sites of the molecules. Research on microbial biotransformations of commonly available sesquiterpenoids into more valuable derivatives has always been of interest because of their economical potential to the perfume, food, chemical and pharmaceutical industries. Fungal transformations of sesquiterpenoids have been less frequently studied compared with many other natural products. In recent years, however, much attention has been given to the exploitation of new products with enhanced biological activity using microorganisms. This review, covering the period from 1990 to 2006, summarizes our knowledge of the biotransformations of sesquiterpenoids by various fungi. Such transformations could lead to the discovery of new reaction pathways that might be useful in the design of new value-added products.

scholarly journals Electronic band contraction induced low temperature methane activation on metal alloys

2020 ◽  
Vol 8 (12) ◽  
pp. 6057-6066 ◽  
Author(s):  
Victor Fung ◽  
Guoxiang Hu ◽  
Bobby Sumpter
Keyword(s):  
Low Temperature ◽  
Natural Gas ◽  
Value Added ◽  
Catalytic Conversion ◽  
Methane Activation ◽  
Metal Alloys ◽  
Electronic Band ◽  
Mild Conditions ◽  
Conversion Of Methane ◽  
Value Added Products

The catalytic conversion of methane under mild conditions is an appealing approach to selectively produce value-added products from natural gas.

Formation of Surface Oxygen Species and the Conversion of Methane to Value-Added Products with N2O as Oxidant over Fe-Ferrierite Catalysts

ACS Catalysis ◽  
2019 ◽  
Vol 10 (2) ◽  
pp. 1406-1416 ◽  
Author(s):  
Guangyu Zhao ◽  
Adesoji Adesina ◽  
Eric Kennedy ◽  
Michael Stockenhuber
Keyword(s):  
Value Added ◽  
Oxygen Species ◽  
Surface Oxygen ◽  
Conversion Of Methane ◽  
Value Added Products

scholarly journals Effect of Bi modification on Pt single crystals towards the glycerol electrooxidation in alkaline media

2019 ◽  
Author(s):  
Victor Yoiti Yukuhiro ◽  
Pablo Sebastian Fernandez ◽  
Matheus B. C. de Souza ◽  
Rafael A. Vicente ◽  
Cléo T. G. V. M. T. Pires
Keyword(s):  
Single Crystals ◽  
Value Added ◽  
Biodiesel Production ◽  
Alkaline Media ◽  
Reaction Pathways ◽  
High Demand ◽  
Catalyst Structure ◽  
Glycerol Electrooxidation ◽  
Industrial Demand ◽  
Value Added Products

The high demand for the biodiesel has increased the glycerol (GlOH) generation, since it is a co-product of biodiesel production, surpassing the industrial demand. In this context, the glycerol electrooxidation reaction (GER) is an interesting option for its chemical valorization, generating high value-added products. In the present work, we studied the GER on different surfaces of Pt single crystals modified with bismuth to understand the effect of the catalyst structure on the activity and reaction pathways.

OPPORTUNITIES FOR STRATEGIC DEVELOPMENT OF BIO-ECONOMY IN THE FOOD AND TOURISM INDUSTRY

2018 ◽  
Vol 28 (5) ◽  
pp. 1681-1684
Author(s):  
Georgi Toskov ◽  
Ana Yaneva ◽  
Stanko Stankov ◽  
Hafize Fidan
Keyword(s):  
National Level ◽  
Value Added ◽  
Tourism Industry ◽  
Small Companies ◽  
Food Sector ◽  
Strategic Development ◽  
Innovation Potential ◽  
Wide Range ◽  
Foreign Brands ◽  
Value Added Products

The European Commission defines the bioeconomy as "the production of renewable biological resources and the conversion of these resources and waste streams into value added products, such as food, feed, bio-based products and bioenergy. Its sectors and industries have strong innovation potential due to their use of a wide range of sciences, enabling and industrial technologies, along with local and implied knowledge." The Bulgarian food industry faces a lot of challenges on the local and national level, which have direct influence on the structure of the production companies. Most of the enterprises from the food sector produce under foreign brands in order to be flexible partners to the large Bulgarian retail chains. The small companies from the food sector are not able to develop as an independent competitive producer on the territory of their local markets. This kind of companies rarely has a working strategy for positioning on new markets. In order to consolidate their already built positions for long period of time, the producers are trying to optimize their operations in a short term. However, the unclear vision of the companies for the business segment does not allow them to fully develop. Tourism in Bulgaria is a significant contributor to the country's economy.

Oxidized indium with transformable dimensions for CO2 electroreduction toward formate aided by oxygen vacancies

2020 ◽  
Vol 4 (7) ◽  
pp. 3726-3731
Author(s):  
Fenghui Ye ◽  
Jinghui Gao ◽  
Yilin Chen ◽  
Yunming Fang
Keyword(s):  
Crucial Role ◽  
Oxygen Vacancies ◽  
Value Added ◽  
Promising Technique ◽  
Co2 Electroreduction ◽  
Value Added Products

Electroreduction of CO2 into value-added products is a promising technique in which the structure of the catalyst plays a crucial role.

scholarly journals β-Galactosidases from a Sequence-Based Metagenome: Cloning, Expression, Purification and Characterization

2020 ◽  
Vol 9 (1) ◽  
pp. 55
Author(s):  
María Florencia Eberhardt ◽  
José Matías Irazoqui ◽  
Ariel Fernando Amadio
Keyword(s):  
Bacterial Species ◽  
Value Added ◽  
Raw Material ◽  
Activity Levels ◽  
Treatment Technology ◽  
Catalytic Domains ◽  
Stabilization Ponds ◽  
Cazy Database ◽  
Genes Encoding ◽  
Value Added Products

Stabilization ponds are a common treatment technology for wastewater generated by dairy industries. Large proportions of cheese whey are thrown into these ponds, creating an environmental problem because of the large volume produced and the high biological and chemical oxygen demands. Due to its composition, mainly lactose and proteins, it can be considered as a raw material for value-added products, through physicochemical or enzymatic treatments. β-Galactosidases (EC 3.2.1.23) are lactose modifying enzymes that can transform lactose in free monomers, glucose and galactose, or galactooligosacharides. Here, the identification of novel genes encoding β-galactosidases, identified via whole-genome shotgun sequencing of the metagenome of dairy industries stabilization ponds is reported. The genes were selected based on the conservation of catalytic domains, comparing against the CAZy database, and focusing on families with β-galactosidases activity (GH1, GH2 and GH42). A total of 394 candidate genes were found, all belonging to bacterial species. From these candidates, 12 were selected to be cloned and expressed. A total of six enzymes were expressed, and five cleaved efficiently ortho-nitrophenyl-β-galactoside and lactose. The activity levels of one of these novel β-galactosidase was higher than other enzymes reported from functional metagenomics screening and higher than the only enzyme reported from sequence-based metagenomics. A group of novel mesophilic β-galactosidases from diary stabilization ponds’ metagenomes was successfully identified, cloned and expressed. These novel enzymes provide alternatives for the production of value-added products from dairy industries’ by-products.

scholarly journals Milk Fat Globule Membrane Proteome and Micronutrients in the Milk Lipid Fraction: Insights into Milk Bioactive Compounds

Dairy ◽  
2021 ◽  
Vol 2 (2) ◽  
pp. 202-217
Author(s):  
Michele Manoni ◽  
Donata Cattaneo ◽  
Sharon Mazzoleni ◽  
Carlotta Giromini ◽  
Antonella Baldi ◽  
...  
Keyword(s):  
Milk Fat ◽  
Lipid Fraction ◽  
Value Added ◽  
Milk Lipid ◽  
Milk Fat Globule Membrane ◽  
Fat Globules ◽  
Milk Fat Globules ◽  
Milk Fat Globule ◽  
Fat Globule ◽  
Value Added Products

Milk lipids are composed of milk fat globules (MFGs) surrounded by the milk fat globule membrane (MFGM). MFGM protects MFGs from coalescence and enzymatic degradation. The milk lipid fraction is a “natural solvent” for macronutrients such as phospholipids, proteins and cholesterol, and micronutrients such as minerals and vitamins. The research focused largely on the polar lipids of MFGM, given their wide bioactive properties. In this review we discussed (i) the composition of MFGM proteome and its variations among species and phases of lactation and (ii) the micronutrient content of human and cow’s milk lipid fraction. The major MFGM proteins are shared among species, but the molecular function and protein expression of MFGM proteins vary among species and phases of lactation. The main minerals in the milk lipid fraction are iron, zinc, copper and calcium, whereas the major vitamins are vitamin A, β-carotene, riboflavin and α-tocopherol. The update and the combination of this knowledge could lead to the exploitation of the MFGM proteome and the milk lipid fraction at nutritional, biological or technological levels. An example is the design of innovative and value-added products, such as MFGM-supplemented infant formulas.

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