H₂ production is severely limited by inefficient conversion of feedstock, inevitable char formation, and methanation reactions aggravated by the slow heating rate during conventional alkaline thermal treatment (ATT) of biomass. Herein, a temperature-programmed alkaline thermal treatment (TP-ATT) incorporating dehydrogenation below 250 °C and rapid alkalinization at 600 °C is developed to produce fractionated H₂ with a high production capacity of 46.06 mmol·g^–1 of cellulose. The H₂ produced via NaOH-promoted dehydrogenation exhibits a high purity of 98%. Optimized TP-ATT achieves complete conversions of cellulose and hemicellulose, and the H₂ productions are 46, 24, and 89% higher than those of conventional ATT from cellulose, hemicellulose, and lignin, respectively. Fast heating and steam-promoted alkalinization reactions are essential for the efficient conversion of char with high H₂ production. TP-ATT of cellulose realizes a 98.14% energy recovery of both H₂ and CH₄. The TP-ATT technology is applicable to different real biomass with approximately 43% higher H₂ production than conventional ATT.

中文翻译：

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木质纤维素生物质的程序升温碱性热处理生产高产分馏氢


H ₂ 的生产受到原料转化效率低、不可避免的炭形成以及生物质常规碱性热处理 (ATT) 过程中缓慢加热速率加剧的甲烷化反应的严重限制。在此，开发了一种结合低于250℃脱氢和600℃快速碱化的程序升温碱性热处理（TP-ATT），以46.06mmol·g的高产能生产分馏H ₂ 。 ^–1 纤维素。通过 NaOH 促进的脱氢产生的 H ₂ 具有 98% 的高纯度。优化后的TP-ATT实现了纤维素和半纤维素的完全转化，纤维素、半纤维素和木质素的H ₂ 产量分别比传统ATT高46%、24%和89%。快速加热和蒸汽促进的碱化反应对于高效转化炭并产生高 H ₂ 至关重要。纤维素的TP-ATT实现了H ₂ 和CH ₄ 98.14%的能量回收。 TP-ATT技术适用于不同的实际生物质，H ₂ 产量比传统ATT高约43%。