摘要
考察了半水煤气常压和变换气加压栲胶脱硫的运行情况,分析比较了橡椀、荆树皮和工业脱硫用栲胶的组成及其对HS-的氧化动力学,探讨了减少堵塔和副反应的方法。结果表明,3种栲胶组成的主要区别为单宁酸含量差异较大。活化预处理后,3种栲胶的脱硫能力显著增强且具有几乎相同的脱硫能力,但单宁酸脱硫能力基本没变化。红外光谱分析表明,活化后3种栲胶均产生了具有较强氧化性的νO—H和νCOOH官能团,而单宁酸没有观察到类似的现象。栲胶与五氧化二钒的浓度比对HS-的氧化速率没有影响,因此,栲胶脱硫工艺不能通过栲胶与五氧化二钒的浓度比控制析硫速度以及副反应发生的程度。
In this study, an industrial process using tannin extracts for H2S removal from semi-water gas and converter gas is investigated. The compositions of valonia, black wattle and industrial tannin extracts are analyzed. The kinetics of sulfide oxidation is also performed. The results show that the content of tannic acid is the major difference in the composition of these three tannin extracts. The hot alkaline pretreatment significantly enhances the sulfide removal efficiency for the three tannin extracts,but leads to almost no change for tannic acid. The FT-IR shows that the vO-H. and vCOOH function groups for the tannin extracts are generated after the pretreatment whereas these groups are not observed for pretreated tannic acid. The ratio of tannin extract to V2 05 does not affect the rates and side-reactions of sulfide oxidation.
出处
《现代化工》
CAS
CSCD
北大核心
2015年第1期148-152,共5页
Modern Chemical Industry
关键词
栲胶
单宁酸
H2S
脱硫
tannin extracts
tannin acid
H2 S
desulfurization
