CuCl-CeO2复合型CO消除剂的制备及其性能

doi:10.16265/j.cnki.issn1003-3033.2024.08.1592

摘要/Abstract

摘要：

为避免煤矿井下CO中毒事故的发生,根据吸附催化原理,以稀土氧化物二氧化铈(CeO₂)为催化剂载体,氯化亚铜(CuCl)为吸附剂,通过热分散法将氯化亚铜负载在二氧化铈表面,制备一种兼具吸附和催化性能的复合型CO消除剂CuCl-CeO₂。利用锥形量热仪分析CuCl、CeO₂和CuCl-CeO₂的CO消除性能,并通过20 L爆炸球-气相色谱联用系统,研究CuCl-CeO₂对瓦斯爆炸峰值压力及其产生的CO消除效果。结果表明:CuCl-CeO₂复合型消除剂能在整个升温过程中有效降低CO的释放率,其消除性能比单一CuCl或CeO₂的消除性能更佳,且当CuCl的质量分数为50% 时,CuCl-CeO₂的CO消除率最高,达88.0 %。随着CuCl-CeO₂质量浓度的增加,瓦斯爆炸峰值压力逐渐降低,达到爆炸峰值压力的时刻显著延迟,CO释放量也不断减少。当加入CuCl-CeO₂的质量浓度为1.00 g/L时,抑爆和CO消除效果最佳;瓦斯爆炸峰值压力由0.508 MPa降至0.387 MPa,达到爆炸峰值压力时间由237.6 ms延迟至483.2 ms,CO体积分数由0.879 7%降至0.108 9%,有效地降低了瓦斯爆炸峰值压力和CO释放量。

关键词: 氯化亚铜(CuCl)-二氧化铈(CeO₂), 复合型CO消除剂, 消除性能, 爆炸峰值压力, CO释放量

Abstract:

In order to avoid the accident of CO poisoning in coal mines, according to the principle of adsorption catalysis, CuCl-CeO₂, a composite CO scavenger with both adsorption and catalytic properties, was prepared by thermal dispersion method using rare earth oxide CeO₂ as catalyst carrier and CuCl as adsorbent. The CO elimination performance of CuCl, CeO₂ and CuCl-CeO₂ was studied by cone calorimeter. At the same time, the peak pressure of gas explosion and the CO elimination effect of CuCl-CeO₂ were studied by a 20 L explosion ball-gas chromatography system. The results show that the CuCl-CeO₂ composite scavenger can effectively reduce the release rate of CO during the whole heating process, and its elimination performance is better than that of CuCl or CeO₂ alone. When the mass fraction of CuCl is 50 %, the CO elimination rate of CuCl-CeO₂ is the highest, reaching 88.0 %. With the increase of CuCl-CeO₂ mass concentration, the peak pressure of gas explosion gradually decreases, the time to reach the peak pressure of explosion is significantly delayed, and the amount of CO released is also decreasing. When the mass concentration of CuCl-CeO₂ is 1.00 g/L, the effect of explosion suppression and CO elimination is the best. The peak pressure of gas explosion is reduced from 0.508 MPa to 0.387 MPa, the time to reach the peak pressure of explosion is delayed from 237.6 ms to 483.2 ms, and the volume fraction of CO is reduced from 0.879 7% to 0.108 9%, which effectively reduces the peak pressure of gas explosion and CO release.

Key words: cuprous chloride(CuCl)-cerium dioxide(CeO₂), composite CO scavenger, elimination performance, explosion peak pressure, CO release

中图分类号:

虞勇, 张雷林. CuCl-CeO₂复合型CO消除剂的制备及其性能[J]. 中国安全科学学报, 2024, 34(8): 186-194.

YU Yong, ZHANG Leilin. Preparation and properties of CuCl-CeO₂ composite CO scavenger[J]. China Safety Science Journal, 2024, 34(8): 186-194.

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试验材料	化学式	性状
亚硫酸钠	Na₂SO₃	白色晶体性粉末
浓盐酸	HCl	无色溶液 (工业级,质量分数为37%)
氯化亚铜	CuCl	黄绿色粉末 (分析纯,纯度≥97.0%)
二氧化铈	CeO₂	黄色球形粉末 (分析纯,纯度≥99.9%)

CuCl-CeO₂复合型CO消除剂的制备及其性能

Preparation and properties of CuCl-CeO₂ composite CO scavenger

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