A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
A honeycomb catalyst body capable of containing in a limited space, having high mechanical strength, less pressure loss, and suitable purification performance is provided, and the honeycomb catalyst body 100 includes a plugged honeycomb structure 10 having porous partition walls 5 defining cells 4 extending from an inflow side end face 2 to an outflow side end face 3, inflow side plugged portions 8(8a) provided at outflow side ends of predetermined cells 4a, outflow side plugged portions 8(8b) provided at inflow side ends of remaining cells 4b, and porous projecting portions 9 projecting so as to extend from the partition walls 5 into the cells 4 and being formed integrally with the partition walls 5; and catalysts loaded onto the projecting portions 9, wherein a porosity of each of the partition walls 5 is 40 to 70%, a thickness of each of the projecting portions 9 is from 30 to 140% of a thickness of the partition wall 5, an amount of the catalyst to be loaded onto the partition walls 5 of the plugged honeycomb structure 10 is smaller than an amount of the catalyst to be loaded onto the projecting portions 9, the catalyst loaded onto projecting portions 9a is a selective reduction catalyst, and the catalyst loaded onto projecting portions 9b is an ammonia slip preventing catalyst.
A honeycomb catalyst body capable of containing in a limited space, having high mechanical strength, less pressure loss, and suitable purification performance is provided, and the honeycomb catalyst body 100 includes a plugged honeycomb structure 10 having porous partition walls 5 defining cells 4 extending from an inflow side end face 2 to an outflow side end face 3, inflow side plugged portions 8(8a) provided at outflow side ends of predetermined cells 4a, outflow side plugged portions 8(8b) provided at inflow side ends of remaining cells 4b, and porous projecting portions 9 projecting so as to extend from the partition walls 5 into the cells 4 and being formed integrally with the partition walls 5; and catalysts loaded onto the projecting portions 9, wherein a porosity of each of the partition walls 5 is 40 to 70%, a thickness of each of the projecting portions 9 is from 30 to 140% of a thickness of the partition wall 5, an amount of the catalyst to be loaded onto the partition walls 5 of the plugged honeycomb structure 10 is smaller than an amount of the catalyst to be loaded onto the projecting portions 9, the catalyst loaded onto projecting portions 9a is a selective reduction catalyst, and the catalyst loaded onto projecting portions 9b is an ammonia slip preventing catalyst.
Honeycomb catalyst body
Wabenförmiger Katalysatorkörper
Corps de catalyseur en nid d'abeille
AOKI TAKASHI (author)
2019-05-01
Patent
Electronic Resource
English