# US 2014/0154145 A1 · Honeycomb catalyst body > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2014/0154145 A1 - Document ID: US20140154145A1 - Status: Published application - Kind: A1 - Application number: 14/086,046 - Filed: 2013-11-21 - Published: 2014-06-05 - Earliest claimed: 2012-12-03 - Assignees: NGK Insulators, Ltd. - Applicants: Ngk Insulators, Ltd. - Inventors: Takashi AOKI - Web page: https://patentgrep.com/patent/US20140154145A1 ## CPC - F01N 3/2828: {Ceramic multi-channel monoliths, e.g. honeycombs} - B01J 35/19: {Catalysts containing parts with different compositions} - B01J 35/57: Honeycombs - B01J 35/60: characterised by their surface properties or porosity - B01J 35/657: {larger than 1000 nm} - B01J 37/0215: {Coating} - C04B 38/0009: {characterised by features relating to the cell walls, e.g. wall thickness or distribution of pores in the walls} - B01J 35/36: Mechanical strength - B01J 2235/30: Scanning electron microscopy; Transmission electron microscopy - C04B 2111/0081: {as catalysts or catalyst carriers} - Y02T 10/12: Improving ICE efficiencies - F01N: GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL-COMBUSTION ENGINES (arrangements in connection with gas exhaust of propulsion units in vehicles B60K13/00; combustion-air intake silencers specially adapted for, or arranged on, internal-combustion engines F02M35/00; protecting against, or damping, noise in general G10K11/16) - B01J: CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS - C04B: LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE {(roofing granules E04D7/005)}; CERAMICS (devitrified glass-ceramics C03C10/00); REFRACTORIES; TREATMENT OF NATURAL STONE - Y02T: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION ## Abstract A honeycomb catalyst body includes a plugged honeycomb structure having porous partition walls, inflow side plugged portions, outflow side plugged portions, and porous projecting portions which project so as to extend from the partition walls into the cells and are formed integrally with the partition walls; and catalyst loaded onto the projecting portions of the plugged honeycomb structure. A porosity of the partition walls of the plugged honeycomb structure is 40 to 70%, a thickness of the projecting portions is from 30 to 140% of a thickness of the partition walls, and an amount of a catalyst loaded onto pore surfaces of the partition walls of the plugged honeycomb structure is smaller than an amount of the catalyst loaded onto the projecting portions. The catalyst loaded onto projecting portions is a three-way catalyst, and the catalyst loaded onto projecting portions is a selective reduction catalyst. ## Claims ### Claim 1 A honeycomb catalyst body comprising: a plugged honeycomb structure having porous partition walls which define and form a plurality of cells extending from an inflow side end surface to an outflow side end surface to become through channels of a fluid, inflow side plugged portions provided at outflow side ends of the predetermined cells, outflow side plugged portions provided at outflow side ends of the remaining cells, and porous projecting portions which project so as to extend from the partition walls into inflow cells, that are defined as the cells provided with the outflow side plugged portions, and into outflow cells, that are defined as the cells provided with the inflow side plugged portions, and which are formed integrally with the partition walls; and a catalyst loaded onto the projecting portions of the plugged honeycomb structure, wherein a porosity of the partition walls of the plugged honeycomb structure is from 40 to 70%, a thickness of the projecting portions is from 30 to 140% of a thickness of the partition walls, an amount of a catalyst loaded onto the partition walls in a cross section vertical to an extending direction of the cells is 40% or less of a total amount of the catalyst loaded onto the plugged honeycomb structure, and the amount of the catalyst loaded onto the partition walls is smaller than an amount of the catalyst loaded onto the projecting portions, and the catalyst loaded onto the projecting portions extending into the inflow cells of the plugged honeycomb structure is a three-way catalyst or an NOx adsorber catalyst, and the catalyst loaded onto the projecting portions extending into the outflow cells of the plugged honeycomb structure is a selective reduction catalyst, or the catalyst loaded onto the projecting portions extending into the inflow cells of the plugged honeycomb structure is a three-way catalyst, and the catalyst loaded onto the projecting portions extending into the outflow cells of the plugged honeycomb structure is an NOx adsorber catalyst. ### Claim 2 (depends on 1) The honeycomb catalyst body according to claim 1, wherein the amount of the catalyst loaded onto the partition walls of the plugged honeycomb structure is 5% or less of the total amount of the catalyst loaded onto the plugged honeycomb structure. ### Claim 3 (depends on 1) The honeycomb catalyst body according to claim 1, wherein an average pore diameter of the partition walls of the plugged honeycomb structure is 25 μm or less. ### Claim 4 (depends on 2) The honeycomb catalyst body according to claim 2, wherein an average pore diameter of the partition walls of the plugged honeycomb structure is 25 μm or less. ### Claim 5 (depends on 1) The honeycomb catalyst body according to claim 1, wherein each of the projecting portions of the plugged honeycomb structure is in the form of a wall which partitions the cell to form a plurality of cells. ### Claim 6 (depends on 4) The honeycomb catalyst body according to claim 4, wherein each of the projecting portions of the plugged honeycomb structure is in the form of a wall which partitions the cell to form a plurality of cells. ### Claim 7 (depends on 1) The honeycomb catalyst body according to claim 1, wherein each of the projecting portions of the plugged honeycomb structure is in the form of a protrusion which projects from the partition wall. ### Claim 8 (depends on 4) The honeycomb catalyst body according to claim 4, wherein each of the projecting portions of the plugged honeycomb structure is in the form of a protrusion which projects from the partition wall. ### Claim 9 (depends on 1) The honeycomb catalyst body according to claim 1, wherein the thickness of the partition walls of the plugged honeycomb structure is from 64 to 508 μm. ### Claim 10 (depends on 6) The honeycomb catalyst body according to claim 6, wherein the thickness of the partition walls of the plugged honeycomb structure is from 64 to 508 μm. ### Claim 11 (depends on 8) The honeycomb catalyst body according to claim 8, wherein the thickness of the partition walls of the plugged honeycomb structure is from 64 to 508 μm.