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影响硫酸生产催化剂低温活性的几个因素 总被引:1,自引:0,他引:1
研究了用碳化母液制备的低温硫酸催化剂中铯、铷、锂等碱金属元素的助催化作用和熔盐用量对催化剂低温活性的影响。结果表明,铯的低温助催化效果最佳,其用量宜控制在Cs/V=0.3~0.6。当Cs/V=0.6时,410℃的SO2转化率达42.5%,比无铯催化剂的转化率高9.5%。铷的低温助催化作用比铯低,宜采取措施,适当提高母液的Cs/Rb。在多种碱金属元素混合使用的情况下,锂元素有较好的助催化作用,其最佳用量为Li/V=0.4,此时410℃的SO2转化率达46%。锂盐的添加顺序对催化剂低温活性亦有一定影响。发现活性组份含量对催化剂低温活性和高温活性影响较大,M/V宜小于4.5。 相似文献
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Rapid fouling tests were used to investigate the scale-preventing property of ZX type scale in hibitors inevaporation of salt electrolyte. ZX type scale inhibitors were tested at high temperature under the boiling conditions.The results indicate that ZX type scale inhibitors have remarkable scale preventing performance during evaporation of salt electrolyte even at the temperature up to 150~C. Among them, ZX IR type scale inhibitor is the best with the rate of scale-preventing reaching to 88.9%. In addition, the scale preventing mechanism of ZX type scale inhibitors was analyzed and its application prospect in the field of continuous commercial fouling preventing discussed. 相似文献