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A fluidized bed reactor (FBR) is a type of reactor device that can be used to carry out a variety of multiphase chemical reactions. In this type of reactor, a fluid (gas or liquid) is passed through a solid granular material (usually a catalyst) at high enough speeds to suspend the solid and cause it to behave as though it were a fluid.
Ebullated bed reactors are a type of fluidized bed reactor that utilizes ebullition, or bubbling, to achieve appropriate distribution of reactants and catalysts.The ebullated-bed technology utilizes a three-phase reactor (liquid, vapor, and catalyst), and is most applicable for exothermic reactions and for feedstocks which are difficult to process in fixed-bed or plug flow reactors due to high ...
Shares of retail giant Walmart (NYSE: WMT) were up a whopping 72% in 2024. To put the magnitude of this move in perspective, this was the best year for Walmart stock since 1998 -- you read that right.
Mechanically Fluidized Reactor (MFR): A mechanical stirrer is used to mobilize particles and achieve properties similar to that a well-mixed fluidized bed. It does not require fluidization gas. [7] Narrow fluidized beds (NFB): For this case, the ratio between the tube and the grain diameters is equal or less than around 10. The dynamics of the ...
U.S. stocks plunged Tuesday as the prospect of higher-for-longer interest rates and letdowns from big-box retailers dampened the mood on Wall Street to start a busy holiday-shortened week.
Meanwhile, Walmart stock rose more than 1% as America's largest big box retailer reported higher same-store sales growth than Wall Street had anticipated. Walmart also boosted its full-year ...
The fluidized catalyst particles are shuttled between the fluidized bed reactor and a fluidized bed burner where the coke deposits are burned off, generating heat for the endothermic cracking reaction. By the 1950s, fluidized bed technology was being applied to mineral and metallurgical processes such as drying, calcining, and sulfide roasting.
A relatively fast fluid velocity (10–30 m/s) [2] is usually required in FR operations to encourage a continuous particle distribution throughout the reactor's vessel. . This minimizes the column's slip velocity (average velocity difference of different fluids in a pipe), providing a positive impact on heat and mass transfer rates and allowing for the use of smaller diameter vessels which can ...