用于被动后处理系统的由钾催化剂和三元催化剂制成的多层膜过滤器

IF 2.2 4区工程技术 Q2 ENGINEERING, MECHANICAL

International Journal of Engine Research Pub Date : 2024-07-24 DOI:10.1177/14680874241261106

Teerapat Suteerapongpun, Masaru Ogura, Katsunori Hanamura

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引用次数: 0

摘要

我们制作了一种多层膜，将三元催化剂（TWC）和汽油微粒过滤器（GPF）集成到一个装置中，称为四元催化转换器。由纳米级钾催化剂颗粒组成的顶层在任何时候都能以几乎 100% 的过滤效率捕集颗粒物质 (PM)，并氧化 PM（主要是烟尘），氧化峰温度大幅降低至 476°C。此外，底层催化剂由亚微 TWC 颗粒组成，兼具氮氧化物还原和一氧化碳氧化功能。同时去除所有污染物的有效温度范围在 420°C-500°C 之间。

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A multi-layer membrane filter made of potassium catalyst and three-way catalyst for a passive after-treatment system

A multi-layer membrane has been fabricated to integrate a Three-Way Catalyst (TWC) and Gasoline Particulate Filter (GPF) into one device, called a four-way catalytic converter. The top layer, made of nano-scale potassium catalyst particles, traps Particulate Matter (PM) with almost 100% filtration efficiency at all times and oxidizes PM (mostly soot) with a significantly reduced temperature of 476°C at the oxidation peak. Moreover, the bottom layer catalyst is comprised of sub-micro TWC particles to combine NO reduction and CO oxidation capabilities. The effective temperature range for the simultaneous removal of all pollutants was between 420°C–500°C.

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