摘要
通过实验确定了一种测定钴钼系CO耐硫变换催化剂中微量砷含量的方法——原子吸收分光光度法。实验中发现混合酸体系对测定结果影响较大,10%盐酸与2%硫酸是一种较理想的组合;不同砷含量对催化剂活性影响的考察结果表明,当催化剂中砷质量分数大于0.2600%后,活性开始明显下降;某些工业应用后的催化剂中砷含量检测结果表明,原料气砷杂质是引起催化剂中毒的主要原因之一。
This study identifies a trace arsenic content detection method of Co-Mo sulfur-tolerant shift catalyst in CO by hydride generation atomic absorption spectrometric determination. Experiment showed that the mixed acid system had great impact on the determination results, and 10% of hydrochloric acid and 2% of sulfuric acid was an ideal combi- nation. The result of the precision and correctness test was also very positive. The test of different arsenic content on the impact of catalyst activity showed that when the arsenic mass fraction of the catalyst reached 0.260 0% or above, the ac- tivity began to decline intensely; The arsenic content test results of typical industrial device transform furnace discharging catalyst show that arsenic impurity in factories raw gas is one of the main reasons caused the poisoning of catalyst. The ar- senic content in the catalyst after some of its industrial applications was tested and the result showed that the arsenic im- purity was one of the major causes of catalyst poisoning.
出处
《煤化工》
CAS
2012年第6期33-36,共4页
Coal Chemical Industry
关键词
砷
原子吸收法
催化剂
活性
arsenic, atomic absorption method, catalyst, activity
