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氧化镁对铜铈催化剂CO氧化活性及抗硫性能影响 被引量:1
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作者 靳广洲 殷慧龄 《北京石油化工学院学报》 1998年第2期49-55,共7页
研究了氧化镁改性载体对铜铈复合氧化物催化剂的CO氧化活性、抗硫性能及烧焦助燃活性的影响。结果表明,以氧化铝为载体的铜铈复合氧化物催化剂具有较高的CO氧化活性,但抗硫中毒的性能稍差;用氧化镁对载体进行改性处理,不仅可以提高催化... 研究了氧化镁改性载体对铜铈复合氧化物催化剂的CO氧化活性、抗硫性能及烧焦助燃活性的影响。结果表明,以氧化铝为载体的铜铈复合氧化物催化剂具有较高的CO氧化活性,但抗硫中毒的性能稍差;用氧化镁对载体进行改性处理,不仅可以提高催化剂的CO氧化活性,当氧化镁改性剂用量达到20%(质量分数)以上,载体中出现了MgO结构碎片的晶相峰之后,还可明显提高其抗硫中毒的能力,以及硫中毒后氢气还原气氛中的还原再生能力。使催化剂进行烧焦助燃时表现出良好的烧焦助燃活性。 展开更多
关键词 催化剂 氧化活性 抗硫性能 烧焦助燃活性
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稀土催化裂化助燃剂反应性能研究 被引量:1
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作者 柳召永 高永福 +2 位作者 娄来银 张忠东 王智峰 《石化技术与应用》 CAS 2011年第6期502-504,共3页
以降烯烃催化剂LBO-16为主催化剂,在提升管反应器中对稀土催化裂化助燃剂RE-Ⅲ反应性能进行了评价。结果表明,在反应温度为500℃,时间为1.95 s,催化剂/原料油(质量比)为5.6,RE-Ⅲ助燃剂用量为3 500×10-6的条件下,轻质油和总液收率... 以降烯烃催化剂LBO-16为主催化剂,在提升管反应器中对稀土催化裂化助燃剂RE-Ⅲ反应性能进行了评价。结果表明,在反应温度为500℃,时间为1.95 s,催化剂/原料油(质量比)为5.6,RE-Ⅲ助燃剂用量为3 500×10-6的条件下,轻质油和总液收率分别增加了1.160,.22个百分点,汽油烯烃体积分数增加了1.85个百分点,转化率和研究法辛烷值变化不大,烟气中一氧化碳体积分数下降3.39个百分点。 展开更多
关键词 稀土助燃 催化裂化 提升管反应器 助燃活性
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Study on the accelerant to the sodium oleate during bauxite flotation 被引量:2
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作者 Liu Sanjun Hu Yuehua Qin Wenqing 《Engineering Sciences》 2012年第2期45-48,共4页
The conventional collector for diaspore mineral is oleic acid (OLA), which is highly insoluble and must be used in high dosage in bauxite flotation. Firstly flotation experiments with every reagent (sodium oleate, ... The conventional collector for diaspore mineral is oleic acid (OLA), which is highly insoluble and must be used in high dosage in bauxite flotation. Firstly flotation experiments with every reagent (sodium oleate, tween-20)were carried out and it was shown that sodium oleate was an effective diaspore collector, whereas nonionic surfactant tween-20 showed little collectivity. Then experiments were carried out with sodium oleate as the main collector with the addition of tween-20 to study the influences of potentiator on diaspore flotation. It could be seen from the experiments that potentiator had a marked influence on the recovery of diaspore, which was raised by more than 12 % and that addition sequence also affected the flotation behavior. It gave the best results with the reagents mixed thoroughly before added and the best ratio of collector oleic acid and potentiator tween-20 slLood at 10: 1. From the calculation of the ingredients in the sodium oleate solution, at the pH 9, sodium oleate acted with surface of the mineral with the acid-soap polymer [ HOL ~ OL- ]. Zeta potential test showed that the potentiator promoted the absorption of collector on the mineral surface, which lowered zeta potential. As could be seen from surface tension experiments, the addition of potentiator tween-20 lowered the CMC ( critical micelle concentration) value of oleic acid solution, which was equivalent to raise the power of the agents. By the adsorptive capability tests, with the addition of tween-20, the adsorption of oleic acid on diaspore got more. 展开更多
关键词 DIASPORE oleic acid FLOTATION potentiator polyxyethylene 20 sorbitan monolaurate
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Mechanism of La2O3 as combustion improver in blast furnace coal injection
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作者 Yanqin Sun Bing Hu +1 位作者 Qing Lü Shuhui Zhang 《International Journal of Coal Science & Technology》 EI 2016年第1期47-52,共6页
La2O3 is a combustion improver suitable for burning pulverized coal in blast furnace. La2O3 forms the active species La3+(CO-)3 that weakens the bridge adhesion of carbon structural units and alters the lattice str... La2O3 is a combustion improver suitable for burning pulverized coal in blast furnace. La2O3 forms the active species La3+(CO-)3 that weakens the bridge adhesion of carbon structural units and alters the lattice structures, thus reducing the activation energy of the pulverized coal and accelerating the burning process. Research shows that La2O3 can form the active species La3+(CO-)3, which weakens the bridge adhesion of carbon structural units and alters the lattice structures of the fixed carbon, hence decreasing the activation energy of the pulverized coal and accelerating the burning process. 展开更多
关键词 Combustion improver La2O3 - Microcrystalline parameter - Average particle diameter Morphologicalappearance
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