Standard test method for trace nitrogen in liquid petroleum hydrocarbons (microcoulometric method)

Journal Article · Tue Jan 01 04:00:00 EST 1980 · Annu. Book ASTM Stand.; (United States)

OSTI ID:6556513

This method covers the determination of the trace total nitrogen in liquid hydrocarbons boilng in the range from 50 to 550/sup 0/C (120 to 1020/sup 0/F), with viscosities between 0.2 and 20 cSt (mm/sup 2//s). The method is applicable to naphthas, distillates, and oils containing 2 to 5000 ppM total nitrogen. The 50 to 350/sup 0/C (120 to 660/sup 0/F) boiling range naphthas and distillates can be injected directly into the pyrolysis tube. The 350 to 550/sup 0/C (660 to 1020/sup 0/F) boiling range oils are diluted and introduced through the single boat inlet system. The sample of liquid petroleum hydrocarbon is injected or volatilized from an inert sample boat into a stream of hydrogen gas flowing through a pyrolysis tube containing a nickel catalyst maintained at approximatly 700/sup 0/C. Reductive pyrolysis converts the nitrogen to ammonia, acid gases are absorbed in a basic scrubber at about 380/sup 0/C, and the ammonia reacts with hydrogen in a titration cell. The hydrogen ions consumed are coulometrically replaced, and the total current required to replace the hydrogen ion is a measure of the nitrogen present in the sample.

• OSTI ID: 6556513
• Journal Information: Annu. Book ASTM Stand.; (United States), Journal Name: Annu. Book ASTM Stand.; (United States) Vol. 25; ISSN ASTSA
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
023000* -- Petroleum-- Properties & Composition
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400102 -- Chemical & Spectral Procedures
AMMONIA
CHEMICAL ANALYSIS
CHEMICAL REACTIONS
COAL TAR OILS
DECOMPOSITION
DISTILLATES
ELEMENTS
ENERGY SOURCES
FLUIDS
FOSSIL FUELS
FUELS
HIGH TEMPERATURE
HYDRIDES
HYDROCARBONS
HYDROGEN
HYDROGEN COMPOUNDS
LIQUIDS
NAPHTHA
NITROGEN
NITROGEN COMPOUNDS
NITROGEN HYDRIDES
NONMETALS
OILS
ORGANIC COMPOUNDS
OTHER ORGANIC COMPOUNDS
PETROLEUM
PETROLEUM DISTILLATES
PETROLEUM FRACTIONS
PYROLYSIS
QUANTITATIVE CHEMICAL ANALYSIS
REDUCTION
THERMOCHEMICAL PROCESSES
TRACE AMOUNTS
VOLTAMETRY