Petroleumsteknologi og beslektet teknologi

This document is applicable to the determination of the total silicon content in gaseous matrices such as biomethane, biogas and landfill gas. Silicon is present in a gas phase contained predominantly in siloxane compounds, trimethylsilane and trimethylsilanol. The analytical form of the silicon measured in liquid phase after conducted sampling and derivatization procedure is soluble hexafluorosilicate anion stable in slightly acidified media. Total silicon is expressed as a mass of silicon in the volume of the analysed gas. This document is applicable to all stated gas matrices with silicon concentrations up to 5 mg/m3, and it is prevalently intended for the biomethane matrices containing (0,1 to 0,5) mg/m3. It can be used for higher concentration but then the absorption efficiency of the bubblers/impingers should be checked before the results can be regarded as valid. The detection limit of the method is estimated as 0,05 mg/m3 based on a sample volume of 0,020 m3. All compounds present in the gas phase are volatile at the absorption and derivatization temperature and gaseous siloxanes are trapped in absorbance media and derivatized into analytical silicon specie are measured by this method. The concentration of the silicon is measured in diluted derivatization media using atomic emission spectrometer upon atomisation/ionisation in microwave or inductively coupled plasma.

This document specifies a test method for the determination of cetane numbers (“CN”) in diesel fuel, using a standard single cylinder, four-stroke cycle, indirect injection engine. The cetane number provides a measure of the ignition characteristics of diesel fuels in compression ignition engines. The cetane number is determined at constant speed in a compression ignition test engine equipped with a swirl chamber. The cetane number scale covers the range from zero to 100, but typical testing is performed in the range from about 40 CN to about 75 CN. The precision of this test method covers the range from 44 CN to about 66 CN. This document is applicable to distillate as well as paraffinic diesel fuels intended for use in diesel engines, including those containing fatty-acid methyl esters (FAME), ignition-improvers or other diesel fuel additives. This engine test procedure may be used for other fuels such as synthetics and vegetable oils. However, samples with fuel properties that interfere with the gravity-based pre-supply pressure to the fuel pump e.g. due to high viscosity can only be used to a limited extent. Precision data for such fuels are not available at this stage. Precision data for paraffinic diesel fuels are currently under development.

This document specifies the safety, performance, consumer packaging and marking requirements including the test methods for firelighters used to light solid fuels in barbecue and grill appliances. This document covers firelighters supplied as either solid, liquid, thickened liquid or gel formulations. However, the use of highly flammable liquids (except in stabilised formulations) is specifically excluded from the scope of this document as their use as barbecue firelighters is regarded as highly dangerous. This document is intended to reduce the risks which may occur during and through barbecuing with solid fuels.

This document is applicable to single use barbecues which burn solid fuels. This document specifies requirements for materials, construction, design and test methods to ensure safe use and satisfactory performance. This document is intended to reduce the risks which may occur during and through barbecuing with solid fuels. This document deals with the reasonably foreseeable hazards presented by single-use barbecues when used by adults. Very vulnerable people can have needs that go beyond the level of safety addressed in this document.

This document specifies the requirements and test methods for barbecue charcoal and barbecue charcoal briquettes for use in barbecue appliances. This document is intended to reduce the risks which can occur during and through barbecuing with solid fuels. Barbecue charcoal in accordance with this document refers to the solid remainder of dry distillation of wood or other vegetable matter.