Influence of Operating Conditions for Fast Pyrolysis and Pyrolysis Oil Production in a Conical Spouted‐Bed Reactor

Abstract

Fast pyrolysis experiments of larch sawdust were conducted in a conical spouted‐bed reactor to study the influences of reaction temperature, inlet gas velocity, feeding rate, and particle size on the product yield and pyrolysis oil quality. For the first time, the optimal conditions were determined for various pyrolysis operations of such reactor to increase the yield and quality of pyrolysis oil. The results demonstrate that the biomass particle size, reaction temperature, biomass feeding rate, and inlet gas velocity all affected the quality and yield of the pyrolysis oil, in this order.

Biochar: Production, Application and the Future

“…Pyrolysis is strongly dependent on the operating parameters, namely temperature, heating rate, and residence time [14]. These operating conditions further help to categorize pyrolysis into other six subclasses.…”

Development of process-product relations for the pyrolysis of sisal residue

“…However, research into the variation of the pyrolysis parameters as an upgrading strategy focused on bio-oil's comprehensive chemical composition analysis has not been carried out previously. Some studies have reported the effect of the temperature on the biooil yield [20][21][22][23][24][25][26][27]; however, few researchers have correlated the variation of this parameter to the chemical species obtained [6,20,21,28]. In general, the increase in temperature promoted the increase in the bio-oil yield, with the maximum at around 550 • C. The chemical composition of the bio-oil and the increase in temperature favored acids, phenolics, and ketones [6].…”

“…Usually, the studies that investigated the influence of feeding rate on the pyrolysis product distributions (bio-oil, char, and gases yields) reported an increase followed by a decrease in the bio-oil yield due to the increase of the parameter [22,26,[29][30][31][32][33]. Studies showed that the bio-oil is mainly composed of phenol and its derivatives, although it has not been reported how the feeding rate influenced its composition [32][33][34][35][36].…”

“…In addition, it was reported that the increase in the feeding rate led to a higher content of oxygenated compounds, highlighted by a higher O/C ratio. The effects of the inert gas flow rate on the pyrolysis product yields were also investigated [6,22,[25][26][27]32,34,38]. The bio-oil obtained at optimum conditions was characterized by GC-MS, identifying mainly phenols, ketones, carboxylic acids, and carbonyls [26].…”

Multiple‐Output Artificial Neural Network to Estimate Solid Cycle Times in Conical Spouted Beds

“…The pattern of particle circulation greatly affects the performance of spouted beds 6, 7 in many applications, such as pyrolysis 8, drying 9, 10, and coating 11, 12. The mass flow rate in the spout, together with the average particle cycle time, have been adopted as standard parameters for assessing the circulation of solids in spouted beds 13, 14.…”