Effect of demineralization on the hydrogasification reactivity of iron-loaded birch char

摘要: Abstract Iron-loaded raw and demineralized birch chars were hydrogasified in a thermobalance to examine the influence of ash removal on their reactivities at 700 800°C. Demineralization was so effective enhancing reactivity low-temperature region that 4 wt% iron loading gave conversion 90 700°C. The increased catalytic effect absence wood can be explained by formation finer metallic particles during gasification. loss activity due calcium silica as main components investigated X-ray diffraction photoelectron spectroscopy. It is proposed form oxides silicates carbonization, inhibiting reduction oxide metal with low temperatures. However, plays quite different role higher Its presence beneficial for catalytically active iron, whereas char rapidly lost this region, owing accelerated sintering particles.