Method for preparing gasoline vehicle particle catcher by using fumed silica

Abstract

The invention relates to the technical field of exhaust pollutant post-treatment of gasoline vehicles, and particularly relates to a method for preparing a low-pressure drop and low-expansion coefficient cordierite gasoline vehicle exhaust particle catcher by using fumed silica. The method comprises the following steps: (1) mixing inorganic raw materials by a dry method, and adding a binder; (2) kneading; (3) practicing; (4) extruding, microwaving and drying; (5) cutting and sintering; (6) punching holes, blocking the holes and then putting the holes into a kiln for back burning. The fumed silica material is adopted as the raw material catcher, the pore-forming effect is remarkable, and the micro-pore connectivity is good, so that the pressure drop and the thermal expansion coefficient ofthe catcher can be reduced; meanwhile, the fumed silica can replace common silica, thereby not only achieving the function of serving as an inorganic component, but also achieving the pore-forming effect and reducing the adding amount of the organic pore-forming agent; the use of the fumed silica not only can meet the use requirements, but also reduces the production cost and improves the production efficiency.

Description

technical field [0001] The invention relates to the technical field of post-treatment of exhaust pollutants from gasoline vehicles, in particular to a method for preparing a low-pressure-drop, low-expansion coefficient cordierite gasoline vehicle exhaust particulate filter, and in particular to the preparation of low-pressure drop, Method for low expansion coefficient cordierite gasoline vehicle exhaust particulate filter. Background technique [0002] The increase in the number of cars has led to an increase in the number of particulate matter emissions, and the haze weather is becoming more and more serious. Gasoline Direct Injection (GDI) is being used more and more widely because of its good power performance, fuel economy, drivability and emission. Mass formation and emission of particulate matter. With the increasingly stringent environmental regulations, the gasoline engine particulate filter (GPF) is the most effective and reliable technical means to solve this pro...

AI Technical Summary

Problems solved by technology

[0007] In order to solve the above-mentioned technical problems, the present invention provides a honeycomb ceramic base material for automobile exhaust purification, especially relates to a cordierite gasoline particle trap product for purification of particulate matter in gasoline vehicle exhaust, which solves the problems of high pressure drop, The problem of high thermal expansion coefficient, and at the same time solve the problem of low pass rate in the process of preparing the trap, which significantly reduces the production cost and improves the production efficiency

Images