Experiments on the pyrolysis of large beechwood particles in fixed beds

Pyrolysis and simulation of typical components in wastes with macro-TGA

“…In all these studies, thermogravimetric analysis (TGA) is the most commonly applied technique and through it, the continuous mass loss characteristics of samples could be obtained to clarify their pyrolysis or gasification behavior. Due to the limited sample mass on TGA, studies on pyrolysis behavior or its impact factors were also conducted on fixed bed reactor with more mass of samples [3,[12][13][14][15][16][17][18][19][20][21]. However, the investigation on the latter normally was based on batch experiments and focused on products characteristics and their impact factors, while could not be compared directly to that on TGA because of lack of real-time data on the same base.…”

Pyrolytic characteristics of pine wood in a slowly heating and gas sweeping fixed-bed reactor

“…The discrepancies in both the yield and the composition of liquid products derived from slow pyrolysis of biomass are not only due to different biomass species, but also to different severities of the secondary reaction of tar vapor. The secondary reaction is affected by the reactor configuration [4,8,9,11], operating conditions [6,12], ash in biomass [13,14], and other parameters. In the literature, it is generally ambiguous to define the slow pyrolysis.…”

Products distribution and gas release in pyrolysis of thermally thick biomass residues samples

“…Two classes of pyrolysis exist: the slow heating rate pyrolysis and the flash/fast pyrolysis where the sample is heated at high heating rates or suddenly exposed to a high temperature. Under fixed bed conditions, with biomass as fuel, the liquid yield is exhibiting a peak value (55-75%) at moderate temperatures (400-550 8C) and high heating rates [1,5,[8][9][10]. Char formation is minimised by high heating rates and high temperature [1,4], while the carbon content in the charcoal and its heating value are increasing with increasing temperature and slow heating rate [5].…”

“…Char formation is minimised by high heating rates and high temperature [1,4], while the carbon content in the charcoal and its heating value are increasing with increasing temperature and slow heating rate [5]. The yields of all the gas species are enhanced by increasing temperature and high heating rates [2,4,9,11,12], except CO 2 which is often reported to reach a plateau at high temperatures (800-900 8C) [2].…”

“…However, the conditions encountered in industrial processes are different and it is therefore important to investigate the thermal decomposition of thermally thick samples to simulate practical conditions better. In those ''large'' samples, heat and mass transport mechanisms will influence the amount and the composition of the gaseous components leaving the bed [9,[13][14][15]. The present investigation is therefore of substantial interest to gather experimental data about the influence of temperature and heating rate on pyrolysis of biomass residues, and especially gas composition.…”