Methods of making honeycomb bodies having inorganic filtration deposits

A method for forming a fired honeycomb body comprising:

• supplying a suspension to an atomizing nozzle that is in fluid communication with a duct comprising an evaporation section, the suspension comprising a mixture including particles of an inorganic material, a binder material, and a liquid vehicle;
• supplying a carrier gas to the duct;
• contacting the nozzle with the carrier gas;
• in the evaporation section, evaporating at least a portion of the liquid vehicle thereby forming agglomerates of the inorganic material;
• depositing the agglomerates on porous walls of the fired honeycomb body;
• and
• binding the inorganic material to the fired honeycomb body to form a porous inorganic material.

A method for applying an inorganic material to a plugged fired honeycomb body comprising porous walls, the method comprising:

• supplying a suspension comprising a mixture including at least particles of the inorganic material and a liquid vehicle to an atomizing nozzle that is in fluid communication with a duct comprising an evaporation section;
• atomizing the suspension with an atomizing gas to form droplets comprising the particles of the inorganic material and the liquid vehicle;
• supplying a heated carrier gas;
• intermixing a gaseous carrier stream including the heated carrier gas with the droplets inside a chamber of the duct to form a mixture;
• evaporating at least a portion of the liquid vehicle from the droplets to form agglomerates of the particles of the inorganic material, the agglomerates being interspersed in the gaseous carrier stream;
• passing the agglomerates and the gaseous carrier stream into the plugged fired honeycomb body in fluid communication with the duct such that the gaseous carrier stream passes through porous walls of the plugged fired honeycomb body, and the walls of the plugged fired honeycomb body trap the agglomerates, wherein the agglomerates are deposited on or in the porous walls of the plugged fired honeycomb body.