The use of biodiesel is being developed to address increasing global concerns regarding the environment and sustainable development. In biodiesel production, a large quantity of glycerol is produced as a by-product. Value-added use of glycerol is important in improving the economic viability of the biodiesel industry. One attractive route is the catalytic dehydration of glycerol to the value-added intermediate acrolein, which is widely used in the synthesis of pharmaceuticals, detergents, and polymers.

Reducing the sulfur content in hydrocarbon fuels has become an important topic in catalysis due to the continuous stringent environmental legislations. In order to fulfill these requirements, one alternative is to design and develop more efficient catalysts for the hydrodesulfurization (HDS) of crude petroleum. For this reason, the well-arranged mesoporous supports based on silica as MCM-41, HMS, and SBA-15, have attracted considerable attention in the preparation of novel hydrotreating catalysts, due to their outstanding textural properties.

When the lights are on and the streets are lit up by neon lights, have you ever wondered why a light bulb can glow and bring bright when it is connected to a power source?

Tungsten wire mesh, also known as tungsten wire shielding mesh, filter tungsten mesh, high temperature tungsten mesh, is widely used in vacuum furnace tungsten mesh heating element, heat treatment support mesh, various machinery, electrical appliances, air conditioning, filtration Radiator and electromagnetic shielding net, vacuum furnace heat treatment grid, light wave filter, etc.

Tungsten alloy mouse weight refers to adding a fixed or adjustable tungsten alloy weight to the gaming mouse to improve the feel of the mouse.

Tungsten copper is widely used as the EDM electrode during the machining. Electric discharge machining refers to a method of machining a workpiece in a certain medium through the electric erosion effect of the pulse discharge between the tool electrode and the workpiece electrode.

Because of many superior physics properties such as high melting point, low sputtering rate, high thermal conductivity, low tritium inventory, high strength at elevated temperatures and low thermal expansion, tungsten-based materials are a unique choice for several applications. However, serious embrittlement in several aspects including low-temperature brittleness, recrystallization brittleness and irradiation induced brittleness is the main drawback to limit the application of tungsten-base materials, especially as the structural materials. In order to alleviate such embrittlement, some tungsten-base alloys with fine grains have been developed by previous studies.

The use of lithium ion secondary batteries (LIBs) as storage batteries for portable electronic devices and electric cars and as stationary storage batteries for solar cells and wind power generation is increasing yearly. However, their properties, such as energy density, power density, safety and durability, require further improvement to increase their use. Although graphite electrodes have been used as the negative electrode in LIBs, the durability is not long enough. Therefore, new materials for use as the negative electrode that can replace graphite have attracted interest. Transition-metal oxides are actively studied due to their good durability, high energy density and high-power density.

Read more …