Carbon black sampling for particle surface area measurement using laser-induced incandescence and reactor process control based thereon

An in-situ method for sampling and measuring carbon black fineness in a process stream comprising

• a) sampling carbon black particles in-situ from a process stream by drawing a sidestream from the process stream using an in-situ eductor with a sample inlet and an in-situ critical orifice on the sample inlet wherein the sample enters a sampling system through the critical orifice,
• b) adjusting the sample to conditions suitable for LII,
• c) measuring the carbon black fineness using LII, and
• d) correlating the LII fineness measurement with actual carbon black particle size.

A method for controlling particle fineness during production of flame generated particulates comprising

• a) sampling the flame generated particulate in-situ in the production process,
• b) adjusting the flame generated particulate sample to conditions suitable for LII,
• c) measuring particle fineness of the adjusted particulate sample using LII,
• d) sending a signal related to Lu-measured particle fineness to a controller,
• e) comparing the particle fineness signal to a set point, and
• f) sending a signal from the controller to adjust operation of the flame generated particulate production process.

An in-situ method for sampling a particle-containing stream and measuring particle fineness and aggregate size using laser-induced incandescence (LII) comprising

• a) sampling particles in-situ,
• b) adjusting the sample to conditions suitable for LII,
• c) measuring incandescence signals and scattering data for the adjusted sample using LII, and
• d) correlating the LII incandescence signals and scattering data measurements with actual particle fineness and aggregate size.