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用活性碳纤维（ＡＣＦ）作为吸附材料，利用吸附法净化发动机排气中ＮＯ_ｘ，试验结果表明ＡＣＦ具有较好的的吸附净化效果，而且消耗也极其缓慢．研究表明，采取吸附法必将增加排气阻力，所以将吸附净化装置和消声器结合在一起优化设计是采用吸附法的最佳途径．
Activated carbon fiber (ACF) was used as adsorbent to purify NO_x in engine exhaust gas by adsorption method. The experimental results show that ACF has better adsorptive purification effect and consumes extremely slowly. Research shows that the adsorption method will increase the exhaust resistance, so the combination of adsorption purification device and muffler optimized design is the best way to use adsorption method.