Publication

Use of microbalances for measurement of gas sorption on catalysts

Albert Renken
1980
Journal Articles

Abstract

The use of microbalances to study gas-solid reactions at high temps. and normal pressure is often limited by fluctuations due to thermal convection in the reaction zone. The fluctuations depend on the pressure, the type of gas, the temp., and the geometry of the arrangement. The problems were overcome by distributing the gas on the circumference of the tube surrounding the specimen. The obsd. fluctuations under normal pressure (1.1 bar) and temps. ?200 Deg were

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Albert Renken
1980
Journal Articles

Abstract

Official source

Related concepts (32)

Vapor pressure

Vapour pressure or equilibrium vapor pressure is the pressure exerted by a vapor in thermodynamic equilibrium with its condensed phases (solid or liquid) at a given temperature in a closed system. The equilibrium vapor pressure is an indication of a liquid's thermodynamic tendency to evaporate. It relates to the balance of particles escaping from the liquid (or solid) in equilibrium with those in a coexisting vapor phase. A substance with a high vapor pressure at normal temperatures is often referred to as volatile.

Gas

Gas is one of the four fundamental states of matter. The others are solid, liquid, and plasma. A pure gas may be made up of individual atoms (e.g. a noble gas like neon), elemental molecules made from one type of atom (e.g. oxygen), or compound molecules made from a variety of atoms (e.g. carbon dioxide). A gas mixture, such as air, contains a variety of pure gases. What distinguishes a gas from liquids and solids is the vast separation of the individual gas particles.

Pressure

Pressure (symbol: p or P) is the force applied perpendicular to the surface of an object per unit area over which that force is distributed. Gauge pressure (also spelled gage pressure) is the pressure relative to the ambient pressure. Various units are used to express pressure. Some of these derive from a unit of force divided by a unit of area; the SI unit of pressure, the pascal (Pa), for example, is one newton per square metre (N/m2); similarly, the pound-force per square inch (psi, symbol lbf/in2) is the traditional unit of pressure in the imperial and US customary systems.

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Use of microbalances for measurement of gas sorption on catalysts

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