Method for controlling the conversion of iron-containing reactor

Details Method for controlling the conversion of iron-containing reactor Method for controlling the conversion of iron-containing reactor

1993-01-27

1994-11-22

Redding, David A.

Chemistry: analytical and immunological testing

Condition responsive control

75376, 75444, 75446, 75450, 75451, 75507, 423439, C22B 514, C01B 3130

Patent

active

053668979

ABSTRACT:
A process for controlling the conversion of reactor feed to iron carbide is disclosed. The reactor feed is subjected to a process gas in a fluidized bed reactor (10), and the off-gas from this reaction is analyzed (56) to determine its composition and the temperature (64) and pressure (66). A stability phase diagram is generated based on the temperature. Different regions of the stability phase diagram are representative of different products being formed by the conversion of the reactor feed. Based on relative concentrations of the individual gases in the off-gas and the total pressure, a point is plotted on the stability phase diagram indicative of the favored reaction product. The process parameters can then be adjusted to insure that iron carbide can be produced from the reactor feed based on the stability phase diagram. In one embodiment, the rate of conversion of the reactor feed into iron carbide is controlled.

REFERENCES:
patent: 2535042 (1950-12-01), Cohn et al.
patent: 2752234 (1956-06-01), Shipley
patent: 2780537 (1957-02-01), Stelling et al.
patent: 2864688 (1958-12-01), Reed
patent: 2894831 (1959-07-01), Old et al.
patent: 2900246 (1959-08-01), Keith et al.
patent: 2921848 (1960-01-01), Agarwal
patent: 3021208 (1962-02-01), Feinman
patent: 3356488 (1967-12-01), Walsh
patent: 3761244 (1973-09-01), Hoffert
patent: 3770361 (1973-11-01), Heimberger
patent: 3885023 (1975-05-01), Gray et al.
patent: 3928021 (1975-12-01), Matsubara et al.
patent: 4045214 (1977-08-01), Wetzel et al.
patent: 4053301 (1977-10-01), Stephens, Jr.
patent: 4202534 (1980-05-01), Davis, Jr.
patent: 4224056 (1980-09-01), Tomizawa et al.
patent: 4360378 (1982-11-01), Lindstrom
patent: 4398945 (1983-08-01), Stephens, Jr.
patent: 4841884 (1989-07-01), Engstrom et al.
patent: 4851046 (1989-07-01), Low et al.
patent: 5073194 (1991-12-01), Stephens et al.
patent: 5118479 (1992-06-01), Stephens, Jr. et al.
patent: 5137566 (1992-08-01), Stephens, Jr. et al.
Stephanopoulos, G., "Synthesis of Alternative Control Configurations for Multiple-Input, Multiple-Output Processes", Chemical Process Control. Prentice Hall, Inc. New Yersey, 1984 pp. 461-482.
Handa, A. et al., "Layer-By-Layer Analysis Of The Chemical State Of Iron In Carburized Steel Surfaces By Conversion Electron Mossbauer Spectrometry," pp. 1999-2002, 1981, J. Mat. Sci., vol. 16, No. 7, Jul.
Oehlberg, R. J. et al., "FIOR Process For Direct Reduction Of Iron Ore," pp. 58-60, 1974, Iron and Steel Engineer, vol 51, No. 4, Apr.
Werther, J. et al., "MeBtechniken fur Gas/Feststoff-Wirbelschichtreaktoren," pp. 605-612, 1990, Chemie. Ingenieur. Technik, vol. 62, No. 8, Aug. 2.
Amendment and Response filed during prosecution of Ser. No. 622,101, now U.S. Pat. No. 4,053,301 by Stephens, Inc. issued Oct. 11, 1977, date of response unknown.

Affiliated with

Also associated with

Rating

Method for controlling the conversion of iron-containing reactor does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method for controlling the conversion of iron-containing reactor, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for controlling the conversion of iron-containing reactor will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1990994