In this study, torrefaction of sunflower seed cake and hydrogen production from torrefied sunflower seed cake via steam gasification were investigated. Torrefaction experiments were performed at 250, 300 and 350 °C for different times (10–30 min). Torrefaction at 300 °C for 30 min was selected to be optimum condition, considering the mass yield and energy densification ratio. Steam gasification of lignite, raw- and torrefied biomass, and their blends at different ratios were conducted at downdraft fixed bed reactor. For comparison, gasification experiments with pyrochar obtained at 500 °C were also performed. The maximum hydrogen yield of 100 mol/kg fuel was obtained steam gasification of pyrochar. The hydrogen yields of 84 and 75 mol/kg fuel were obtained from lignite and torrefied biomass, respectively. Remarkable synergic effect exhibited in co-gasification of lignite with raw biomass or torrefied biomass at a blending ratio of 1:1. In co-gasification, the highest hydrogen yield of 110 mol/kg fuel was obtained from torrefied biomass-lignite (1:1) blend, while a hydrogen yield from pyrochar-lignite (1:1) blend was 98 mol/kg. The overall results showed that in co-gasification of lignite with biomass, the yields of hydrogen depend on the volatiles content of raw biomass/torrefied biomass, besides alkaline earth metals (AAEMs) content.

在这项研究中，研究了葵花籽饼的焙烧和通过蒸汽气化从焙烧的葵花籽饼中制氢。在250、300和350°C下进行了不同时间（10–30分钟）的烘焙实验。考虑到质量产率和能量致密化比，选择在300°C下烘烤30分钟为最佳条件。在下吸式固定床反应器中对褐煤，原料和焙烧过的生物质以及它们的不同比例的混合物进行蒸汽气化。为了进行比较，还进行了在500°C下用焦炭进行的气化实验。焦炭的蒸汽气化获得了100 mol / kg燃料的最大氢产率。分别从褐煤和焙烧的生物质中获得了84和75 mol / kg燃料的氢气产率。褐煤与原始生物质或焙烧生物质以1：1的混合比例共气化时表现出显着的协同作用。在共气化中，从烘焙过的生物质-褐煤（1：1）混合物获得的最高氢产率为110 mol / kg燃料，而从焦炭-褐煤（1：1）混合物获得的氢产率为98 mol / kg。总体结果表明，在褐煤与生物质的共气化中，除碱土金属（AAEMs）含量外，氢的产率还取决于原始生物质/焙干的生物质中的挥发物含量。