【摘要】 讨论了生物质中钾盐对水气转换反应过程的影响,研究了不同工艺条件下单一钾盐或混合钾盐对超临界水中水气转换的影响。结果表明:超临界水中水气转换的气体产物为H₂、CO和CO₂;所研究的钾盐均能显著提高H₂产率,且KHCO₃的影响程度最强;提高反应温度、延长反应停留时间均能促进H₂的生成,增大反应压力和增加K⁺浓度对H₂产率的影响则比较复杂;钾盐对水气转换的影响可能是通过以草酸氢盐和甲酸盐为中间产物的机理进行。更多还原

【Abstract】 The influence of potassium salts in biomass on the process of water gas shift reaction（WGSR） was discussed, so as to study the effects of single or mixed potassium salt on the WGSR in supercritical water under different technological conditions. Results show that the gaseous products of WGSR are H₂, CO and CO₂. All the potassium salts can promote the H₂ yield significantly, and KHCO₃ has the strongest influence on H₂ yield than other salts involved. An increase in temperature and reaction time can both result in higher H₂ yields, while the effects of pressure and K⁺ concentration are complicated. The accelerated effect of potassium salts could be explained by the formation of intermediate products oxalate and formate.更多还原