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Title: Encapsulation method for preparation of pellets with high attrition resistance

Abstract

This disclosure provides a method to produce highly attrition resistant pellets by encapsulating reactive components in a vitrified clay outer layer. The reactive component mixture is present relative to the clay substrate in a weight ratio of part per 60-100 part to about 60 parts of the clay substrate. The reactive components are agglomerated first, and clay substrate is added to form the outer layer of the pellet. The pellets are calcined at temperatures above 1200 C to form a vitrified clay semi porous outer layer providing high strength to the pellet while facilitating the gas transfer for the reaction with the encapsulated reactive components. Pellets containing CuO—Fe2O3-alumina oxygen carrier for chemical looping combustion of fuel demonstrated high attrition resistance and high reactivity with methane.

Inventors:
;
Issue Date:
Research Org.:
US Dept. of Energy (USDOE), Washington, DC (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1925049
Patent Number(s):
11433385
Application Number:
16/570,403
Assignee:
Energy, United States Department of (Washington, DC)
Patent Classifications (CPCs):
B - PERFORMING OPERATIONS B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL B01J - CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY
F - MECHANICAL ENGINEERING F23 - COMBUSTION APPARATUS F23C - METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN  {A CARRIER GAS OR} AIR 
Resource Type:
Patent
Resource Relation:
Patent File Date: 09/13/2019
Country of Publication:
United States
Language:
English

Citation Formats

Siriwardane, Ranjani, and Riley, Jarrett. Encapsulation method for preparation of pellets with high attrition resistance. United States: N. p., 2022. Web.
Siriwardane, Ranjani, & Riley, Jarrett. Encapsulation method for preparation of pellets with high attrition resistance. United States.
Siriwardane, Ranjani, and Riley, Jarrett. Tue . "Encapsulation method for preparation of pellets with high attrition resistance". United States. https://www.osti.gov/servlets/purl/1925049.
@article{osti_1925049,
title = {Encapsulation method for preparation of pellets with high attrition resistance},
author = {Siriwardane, Ranjani and Riley, Jarrett},
abstractNote = {This disclosure provides a method to produce highly attrition resistant pellets by encapsulating reactive components in a vitrified clay outer layer. The reactive component mixture is present relative to the clay substrate in a weight ratio of part per 60-100 part to about 60 parts of the clay substrate. The reactive components are agglomerated first, and clay substrate is added to form the outer layer of the pellet. The pellets are calcined at temperatures above 1200 C to form a vitrified clay semi porous outer layer providing high strength to the pellet while facilitating the gas transfer for the reaction with the encapsulated reactive components. Pellets containing CuO—Fe2O3-alumina oxygen carrier for chemical looping combustion of fuel demonstrated high attrition resistance and high reactivity with methane.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2022},
month = {9}
}

Works referenced in this record:

Interaction of Iron Oxide with Alumina in a Composite Oxygen Carrier during the Production of Hydrogen by Chemical Looping
journal, December 2011


Thermal behavior of the kaolin minerals
journal, May 1935


Catalyst and Methods for Natural Gas Processes
patent-application, September 2017