Development of a catalyst for conversion of syngas-derived materials to isobutylene

Technical Report · Fri Apr 03 04:00:00 EST 1992

DOI:https://doi.org/10.2172/6669055· OSTI ID:6669055

Gajda, G J

The CO conversion and isobutylene yield for Runs 11 to 20 (except run 12) at the conditions of 450[degree]C, 1,200 psig, and 1,920 gas hourly space velocity (GHSV), Is given in Table 2. These conditions generally provide the maximum CO conversion for each run. Runs 5 to 10 is also provided in Table 2 for a comparison. The description of the catalysts also given in Table 2 includes the composition, method of preparation, and calcination temperature for each catalyst tested. Data for Runs 12 and 21 are at different conditions, as discussed later in this report. The conversion and yield data were obtained at relatively short times on-stream ([approximately]11 hours). The extent of catalyst deactivation has not been determined. The freshly precipitated CeO[sub 2] catalyst, IS-9, is by far the most active but is poorly selective to Isobutene. The catalyst primarily produces saturated by-products. The commercial CeO[sub 2,] IS-8, had low surface area and little activity. Earlier tests show that lowering the calcination temperature of precipitated catalysts produced higher surface areas, higher tetragonal content, higher activity and higher yields. The ZrO[sub 2] sol-gel catalysts show a similar relationship. A comparison of Run 9 (ZrO[sub 2] calcined at 600[degree]C) and Run 16 (ZrO[sub 2] calcined at 500[degree]C) shows that with the decrease in temperature: the surface area almost doubles (81 m[sup 2]/g vs. 45 m[sup 2]/g); the tetragonal phase increased from 10 to 55%; and CO conversion increases (23.9 vs. 30.2%). However, the isobutylene yield remained essentially the same (2.23 vs 2.21%).

• Research Organization: UOP, Inc., Des Plaines, IL (United States)
• Sponsoring Organization: DOE; USDOE, Washington, DC (United States)
• DOE Contract Number: AC22-91PC90042
• OSTI ID: 6669055
• Report Number(s): DOE/PC/90042-T3; ON: DE93007602
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010408 -- Coal
Lignite
& Peat-- C1 Processes-- (1987-)
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201* -- Chemical & Physicochemical Properties
ALKENES
CATALYSTS
CATALYTIC EFFECTS
CERIUM COMPOUNDS
CERIUM OXIDES
CHALCOGENIDES
CHEMICAL PREPARATION
CONVERSION
DOCUMENT TYPES
FLUIDS
GASES
HYDROCARBONS
ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PROGRESS REPORT
PROPYLENE
RARE EARTH COMPOUNDS
SPECIFICITY
SYNTHESIS
SYNTHESIS GAS
TRANSITION ELEMENT COMPOUNDS
YIELDS
ZIRCONIUM COMPOUNDS
ZIRCONIUM OXIDES