Decarbonized olefins production using process intensification
AssigneeExelus, Inc.
InventorsMitrajit Mukherjee, Vamsi M. Vadhri, Narendra Joshi, Sankaran Sundaresan
Life of this patent
Estimating the term…
Abstract
A mixed metal oxide Selective Oxygen Carrier (SOC) suitable for the selective oxidation of hydrogen comprising bismuth oxides, rare earth oxides, and a dopant of Ti, Zr, and Hf and is characterizable by a high level of oxygen carrying capacity, selectivity and stability. The SOC can be synthesized using a sol gel procedure, co-precipitating salts, or the incipient wetness method. The invention includes a process of dehydrogenating a paraffin over a SOC. A SOC can also be used to catalytically crack hydrocarbons.
Claims20
A mixed metal oxide Selective Oxygen Carrier (SOC) suitable for selective oxidation of hydrogen at elevated temperatures in the presence of hydrocarbons and steam with a composition of the general formula (AC) (ST) (DP) wherein
- a) the Active Carrier (AC) represents oxides of bismuth,
- b) the active carrier stabilizer (ST) represents oxides of Rare Earth metals selected from the group of cerium (Ce), dysprosium (Dy), erbium (Er), europium (Eu), gadolinium (Gd), lanthanum (La), neodymium (Nd), praseodymium (Pr), samarium (Sm), terbium (Tb), ytterbium (Yb), and yttrium (Y) or mixtures thereof, and
- c) the Dopant (DP) represents oxides of Group 4 metals Titanium (Ti), Zirconium (Zr), Hafnium (Hf) or mixtures thereof;
- and
- characterizable by OC, the oxygen carrying capacity >20 kg O2/ton carrier, Selectivity Parameter≤0.1 and a stability parameter ≤0.0025 using a test where the SOC is loaded in a fixed-bed reactor such that the 50>dT/dP>10 (diameter of tube to diameter of SOC particles) and 200>L/dP>50 (length of SOC bed to diameter of SOC particles) and 2>dP>0.5 mm exposed to a feed stream of a 1:1 molar mixture of propylene-to-hydrogen at a temperature of 550° C., 0.05 atm pressure and a feed rate of 0.5 hr−1 weight hourly space velocity and subjected to 20 cycles of reaction for 9 minutes followed by 9 minutes of air regeneration with nitrogen purges of 5 minutes between reaction and air regeneration.
Dependencies are inferred from the claim text.