The formation of inorganic particles during suspension heating of simulated wastes

Journal Article · Wed May 01 04:00:00 EDT 1991 · Environmental Progress; (United States)

DOI:https://doi.org/10.1002/ep.670100209· OSTI ID:5591334

Mulholland, J A; Sarofim, A F ^[1]; Yue, Guangxi ^[2]

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1. Massachusetts Inst. of Tech., Cambridge (United States)
2. Tsinghua Univ., Beijing (China)

Measurements of metal partitioning between the fine condensation aerosol and the larger particles produced during rapid heating of aqueous and organic solutions containing metal additives with widely varying volatiles were made in a laboratory-scale furnace operated over a range of temperatures (900 to 1,500 K). A stream of monodisperse droplets (nominal diameter of 36 {mu}m) was injected into an isothermal, laminar drop-tube reactor, quickly developing into a stream of droplets with heterogeneous size distribution due to droplet collision and coalescence. Aqueous solutions containing nitrates of cadmium, lead and nickel gave rise to particles with trimodal size distributions. Partitioning of the larger particles between a residual mode (particle aerodynamic diameter, D{sub p, aero} > 7 {mu}m) and an intermediate mode (1 {mu}m > D{sub p,aero} > 7 {mu}m) is suggestive of particle porosity variation. In addition, ultrafine particles, with submicron aerodynamic diameter, were formed, both by the anticipated vaporization pathway and by an unexpected explosive fragmentation mechanism. The higher volatility of the chloride than the oxide was evidenced by an enhanced inorganic aerosol formation during the high temperature treatment of a nickel chloride solution. The oxidative burning of organometallic solutions of nickel and lead produced only particles of submicron aerodynamic size.

• OSTI ID: 5591334
• Journal Information: Environmental Progress; (United States), Journal Name: Environmental Progress; (United States) Vol. 10:2; ISSN ENVPD; ISSN 0278-4491
• Country of Publication: United States
• Language: English

Related Subjects

09 BIOMASS FUELS
095000* -- Biomass Fuels-- Environmental Aspects-- (1990-)
54 ENVIRONMENTAL SCIENCES
540120 -- Environment
Atmospheric-- Chemicals Monitoring & Transport-- (1990-)
AEROSOLS
AIR POLLUTION
BENCH-SCALE EXPERIMENTS
COLLOIDS
DISPERSIONS
DROPLETS
ELEMENTS
EMISSION
INCINERATORS
METALS
PARTICLE SIZE
PARTICLES
POLLUTION
SIZE
SOLS
TEMPERATURE RANGE
TEMPERATURE RANGE 0400-1000 K
TEMPERATURE RANGE 1000-4000 K