McWilliams Robert C, van Walsum G Peter
Department of Environmental Studies and Glasscock Research Center, Baylor University, Waco, TX 76798-7266, USA.
Appl Biochem Biotechnol. 2002 Spring;98-100:109-21. doi: 10.1385/abab:98-100:1-9:109.
Hydrolysates produced by the pretreatment of aspen wood with liquid hot water were compared with hydrolysates produced using carbonic acid pretreatment. Pretreatment temperatures tested ranged from 180 degrees to 220 degrees C; reaction times were varied between 2.5 and 30.5 min. Under most conditions tested, it was found that the presence of carbonic acid had no discernible effect on the amount of xylose released or concentration of furan compounds, as indicated by ultraviolet-visual absorbance between 270 and 280 nm. Thus, there appears to be little difference in the severity of the pretreatment conditions with or without the presence of carbonic acid. The presence of carbonic acid did, however, result in a hydrolysate with a higher final pH. It is hypothesized that the presence of the carbonic acid during the reaction may have the effect of reducing the accumulation of organic acids in the hydrolysate.
将用液态热水预处理白杨木产生的水解产物与用碳酸预处理产生的水解产物进行了比较。测试的预处理温度范围为180摄氏度至220摄氏度；反应时间在2.5分钟至30.5分钟之间变化。在大多数测试条件下，发现碳酸的存在对木糖释放量或呋喃化合物浓度没有明显影响，这通过270至280纳米之间的紫外可见吸光度来表示。因此，有或没有碳酸存在时预处理条件的严苛程度似乎几乎没有差异。然而，碳酸的存在确实导致水解产物的最终pH值更高。据推测，反应过程中碳酸的存在可能具有减少水解产物中有机酸积累的作用。
