溶剂再生塔设回流的作用是什么?
参考答案:
在溶剂再生塔顶出来的物质中包含大量酸性气,但其中亦有少量的胺液,设回流是为将酸性气尽量解吸出来,而且减少胺液的损失。
An analyst does research about bond yield and gathers the following information about the call structure for a 7 percent coupon bond that pays interest semiannually and matures in ten years: ·not callable for the next 5 years ·first callable at beginning of year 6 (end of the fifth year) at $102 ·first par call date at beginning of year 8 (end of the seventh year) at $100 If the bond is correctly priced at $102.75, the bond's yield to first call is closest to:()
A. 3.34%
B. 6.35%
C. 6.68%
纯化器出分子筛的CO2超标的原因?