Abstract

The extraction of hydrogen sulfide from coke-oven gas by means of alkaline aqueous solutions occurs in the presence of several acidic components, which dissolve to form acids with different degrees of dissociation. The relation between the acidic components of the gas depends on the batch composition and the corresponding coking conditions. The ratio H₂S/CO₂ decreases on coking coal with low sulfur content and elevated calcium content and with an elevated content of gas coal. There is little scope for slowing the CO₂ absorption. The selectivity of H₂S capture increases somewhat with increase in content of ballast salts. A general analysis of ballast-salt formation is proposed for circulatory and oxidative methods of sulfur removal. The influence of ballast salts on the activity of the absorbent solution in arsenic–soda sulfur removal is not critical. That may be explained in terms of As⁵⁺/As³⁺ conversion. The oxidation of hydrogen cyanide by strong acids produces compounds that cannot be regenerated; recommendations are made for slowing that process. The influence of organic contaminants on the removal of sulfur from coke-oven gas is considered.

中文翻译：

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杂质对焦炉煤气脱硫的影响

摘要

借助于碱性水溶液从焦炉煤气中提取硫化氢是在几种酸性组分的存在下进行的，这些酸性组分溶解形成具有不同解离度的酸。气体的酸性成分之间的关​​系取决于批料组成和相应的焦化条件。在硫含量低，钙含量高，气煤含量高的炼焦煤中，H ₂ S / CO ₂比降低。减缓CO ₂吸收的空间很小。H ₂的选择性S捕获量随着压载盐含量的增加而有所增加。提出了用于循环和氧化脱硫方法的压载盐形成的一般分析。压载盐对吸收剂溶液中砷-苏打水脱硫的影响并不重要。可以用As ⁵⁺ / As ³⁺转换来解释。强酸将氰化氢氧化会生成无法再生的化合物。提出了减慢该过程的建议。考虑了有机污染物对从焦炉煤气中脱硫的影响。