Acid salts have been shown to catalyze xylan hydrolysis selectively and efficiently for xylooligosaccharides (XOS) production while using acid salts that are non-toxic and available as feed additives can avoid separation from resulting XOS-rich hydrolysates. There is no report on XOS production with sodium bisulfate (NaHSO₄) hydrolysis, of significance is that NaHSO₄ as feed additive does not need to be separated. In this work, NaHSO₄ hydrolysis was firstly employed to produce XOS from poplar. XOS yield of 42.7% was reached under optimal conditions of 0.04 mol/L NaHSO₄, 170 °C and 60 min. After hydrogen peroxide/acetic acid and sodium hydroxide treatments of NaHSO₄-pretreated poplar, high yields of glucose (92.0%) and xylose (91.3%) were obtained at a low cellulase dose of 5 FPU/g dry mass. NaHSO₄ hydrolysis was a novel strategy to prepare XOS efficiently with simple operation steps, and XOS-rich hydrolysates could be potentially used as feed additives without NaHSO₄ separation.

酸式盐已被证明可选择性且有效地催化木聚糖水解以生产低聚木糖 (XOS)，而使用无毒且可用作饲料添加剂的酸式盐可避免与所得富含 XOS 的水解产物分离。硫酸氢钠（NaHSO ₄）水解生产XOS的报道尚未见报道，重要的是作为饲料添加剂的NaHSO ₄不需要分离。本工作首次采用NaHSO ₄水解法生产杨树XOS。_{在0.04 mol/L NaHSO 4}、170 ℃和60 min的最佳条件下，XOS的产率达到了42.7% 。在过氧化氢/乙酸和氢氧化钠处理 NaHSO _4后-预处理的杨树，在 5 FPU/g 干重的低纤维素酶剂量下获得了高产率的葡萄糖（92.0%）和木糖（91.3%）。NaHSO ₄水解是一种通过简单操作步骤高效制备 XOS 的新策略，富含 XOS 的水解产物可以潜在地用作饲料添加剂而无需分离 NaHSO ₄。