Catalytic converter honeycomb structure

There is no particular restriction as to the shape of the plate as long as it can divide the exhaust gas-incoming section and the purified gas-outgoing section into a plurality of exhaust gas-incoming passages and a plurality of purified gas-outgoing passages, respectively. There can be mentioned, for example, diaphragms 35a and 35b of a housing 33 shown in Fig. The diaphragms may also be diaphragms 35a and 35b of a housing 33 shown in Fig.

This form is preferred because it allows formation of exhaust gas passages corresponding to the individual cylinders of a multi-cylinder engine and can more effectively prevent the reduction in engine output caused by exhaust gas interference. Further, the diaphragms need not divide the exhaust gas-incoming section and purified gas-outgoing section of housing into even exhaust gas-incoming passages and even purified gas-outgoing passages, respectively, and may divide them into uneven passages.

As such diaphragms, there can be mentioned, for example, diaphragms 35a and 35b of a housing 33 shown in Fig. Diaphragms of various shapes such as shown above can be used in the catalytic converter of the present invention.

Irrespective of the shape of diaphragm, diaphragms, specifically their edge portions need be provided along the internal wall, plugged areas or thick partition walls of the honeycomb catalyst body. As to the material for the housing including the main body and the diaphragms , there is no particular restriction.

However, a metal, particularly a stainless steel e. SUS superior in mechanical strengths and corrosion resistance can be suitably used. This holding material 34 holds and fixes the honeycomb catalyst body 32 inside the housing As to the material for the holding material, there is no particular restriction.

However, the material is preferably a non-intumescent ceramic fiber mat because such a mat generates no excessive pressure to the honeycomb catalyst body during the use of the catalytic converter i. Specifically, there can be suitably used, for example, a mat made of a ceramic e.

Since the contacting areas of the honeycomb catalyst body segments have high mechanical strengths and are strong as compared with other portions ordinary partition walls of the segments, there can be obtained the same effect as when the above-mentioned internal wall, plugged areas or thick partition walls have been formed in a honeycomb structure. The honeycomb catalyst body 32 shown in Fig.

However, as to the shape of the composite, there is no particular restriction as long as the honeycomb catalyst body is a composite of at least two honeycomb catalyst body segments. In the above, the at least two honeycomb catalyst body segments may be bonded to each other with, for example, a ceramic cement e. When, as in a catalytic converter 31 shown in Fig. The honeycomb catalyst body having a partition wall thickness of 0. Even when, as in a catalytic converter 31 shown in Fig.

Such a construction is preferred because erosion can be prevented not only at the exhaust gas-incoming section 33a side but also at the purified gas-outgoing section 33b side. When there is used, as above, a honeycomb catalyst body which is a laminate of a first honeycomb catalyst body and two second honeycomb catalyst bodies provided at the both sides of the first honeycomb catalyst body, there is preferred a catalytic converter which is constructed, like a catalytic converter 31 shown in Fig.

In the above construction, since division of gas passages is made only by the second honeycomb catalyst bodies, no diaphragm which causes erosion is required. Further, since the second honeycomb catalyst bodies make a face contact with the first honeycomb catalyst body, the second honeycomb catalyst bodies cause no erosion. Therefore, the generation of erosion scraping in honeycomb catalyst body can be prevented more effectively.

The same effect as in the catalytic converter 31 shown in Fig. Incidentally, as the ceramic reticulate material, there can be suitably used, for example, a ceramic-made honeycomb structure of about 5 to 50 mm in thickness. There is also preferred a composite catalytic converter like a catalytic converter 41 shown in Fig. In the above construction, each catalytic converter of a composite catalytic converter holds at least two honeycomb catalyst bodies in a housing; at least two gas passages completely independent from each other are formed; and no diaphragm which causes erosion is necessary.

The present invention is described more specifically below by way of Examples. However, the present invention is in no way restricted by these Examples. As the honeycomb structure for constituting a honeycomb catalyst body, there was used a honeycomb structure made of cordierite, which had a circular end face shape of mm in diameter, a length of mm, a square cell shape of 1. That is, there was used a honeycomb structure wherein a large number of cells were divided by an internal wall into left and right two cell blocks.

That is, there was used a honeycomb structure wherein a large number of cells were divided by thick partition walls into left and right two cell blocks. As the honeycomb structure for constituting a honeycomb catalyst body, there was used a laminate such as shown in Fig. In lamination of the first honeycomb structure 32c and the second honeycomb structure 32d, the two honeycomb structures were disposed so that the partition walls of the central portions of the two honeycomb structures were contacted with each other.

In lamination of the first honeycomb structure 32c and the two second honeycomb structures 32d, the three honeycomb structures were disposed so that the partition walls of the central portions of the three honeycomb structures were contacted with each other. On the partition walls of each of the honeycomb structures of Example 1 to Example 4 was wash-coated a catalyst solution containing a catalyst component, and then a heat treatment was applied at a high temperature for baking, to allow the honeycomb structure to carry an exhaust gas purification catalyst, whereby each honeycomb catalyst body was obtained.

As the exhaust gas purification catalyst, there was used a three way catalyst containing a mixture of Pt and Rh. As the housing for holding each of the above honeycomb catalyst bodies, there was used a housing such as a housing 33 shown in Fig. The cone-shaped exhaust gas-incoming section 33a and the cone-shaped purified gas-outgoing section 33b were detachable from the cylindrical portion of the housing, capable of holding the honeycomb catalyst body. The housing main body and diaphragms were constituted by a plate of 2 mm in thickness, made of stainless steel SUS As shown in Fig.

In holding the honeycomb catalyst body in the housing, diaphragms, particularly the edge portions thereof were disposed along the internal wall, thick partition walls or some partition walls of the second honeycomb catalyst s.

The honeycomb structure of the present invention can be suitably used as a catalyst carrier in a honeycomb catalyst body which constitutes the catalytic converter of the present invention. The catalytic converter of the present invention can be suitably used as a catalytic converter in a multi-cylinder e.

USB2 en. EPB1 en. JPA en. DED1 en. Internal combustion engine having at least two cylinders and an exhaust gas treatment system. Honeycomb structure, process for producing honeycomb structure, casing and exhaust gas purifier. USA1 en. WOA1 en. Catalytic conversion of alcohols having at least three carbon atoms to hydrocarbon blendstock. NOB1 en. Method for manufacturing a porous foam support, and porous foam supports for catalytic reactors, adsorption processes and energy storage. Engine exhaust system has catalyst box partitioned in two, with parallel exhaust inlet connections.

Evacuation and treatment device of exhaust gases of an internal combustion engine. Replace the catalytic converter. There isn't gold in a catalytic converter. Replace the catalytic converterReplace the catalytic converter.

Usually after your catalytic converter. The Titan booster does not have a catalytic converter. If you're referring to removing the catalytic converter from your vehicle, first off this is illegal. Secondly no modern engine will run properly with the catalytic converter removed. You must have a fully functional catalytic converter in place. It can be, but it is illegal to remove a catalytic converter.

Catalytic converter failure. Removing a catalytic converter and not replacing it is highly illegal. There is no substitute for a catalytic converter. It is illegal for a salvage yard to sell a catalytic converter. There is only one catalytic converter on the 99 TL. Log in. Catalytic Converters. Study now. See answer 1. Best Answer. Study guides. Q: Why does a catalytic converter have a honeycomb structure? Write your answer Related questions.

What is in a catalytic converter? How do you tell if there is still platinum in a catalytic converter? Ware is the catalis of an catalytic converter located? In high speed engines, heat rises and the combs inside the catalysts fill and lose their function.

Even if cars have worked very smoothly, catalytic converters have a certain lifespan. We can easily replace the dead catalysts. Replaced catalysts are raw materials for recycling plants.

Collecting catalytic converters and selling them as scrap is also a big market. In addition, the scrap catalyst sector is growing day by day. Structure of Catalytic Converters Inside the automobile exhausts, there is a system that cleans the poisonous gases caused by combustion. Do you want to provide feedback on this article? I confirm that I am not writing spam comments.