ChemistryMethanol Alcohol Containing Fuels As methanol is a pure chemical compound its physical properties are precise. For example, there is no need to talk of the Reid Vapour Pressure…
ChemistryEthanol Alcohol Containing Fuels The two alcohols of most importance in fuel technology are the two most structurally simple: methanol and ethanol. Both are good fuels for spark ignition…
ChemistryVapour Pressure of Coal Tar When it was first proposed to construct ‘dust-free roads’ by using tar instead of the inorganic materials used previously there was concern that the vapour…
ChemistryViscosity of Coal Tar Clearly solid and liquid will often be in co-existence and the viscosity is a factor in any application. This can be determined from the classical…
ChemistryDistillate Products from Coal Tars The processing of tars remains an important industry in countries including the US and Japan. Tar distillate is considerably less of a ‘rag bag’ of…
ChemistryProperties of Coal Tars The term tar generally means the liquid decomposition product of any organic substance, for example wood or peat. It is with coal tars specifically that…
ChemistryWhat is Coal Tars When a coal decomposes (‘carbonises’) there are three classes of product: solid, liquid and gaseous. The solid we refer to as coke or as char.…
ChemistryPhysical Properties of Petroleum Jelly Constituents of petroleum jelly are C25+. Being not a single organic compound but containing many such compounds, petroleum jelly does not have a melting point…
ChemistryElectrical Conductivity of Motor Oil The most interesting side to the electrical conductivity of lubricating oils is the huge difference between those which are simply residual petroleum stock and those…
ChemistryVapour Pressure of Motor Oil This quantity is not a performance criterion in lubricant motor oil performance. That is not to say that it is of no interest: information on…