Abstract Lignite gasification may be characterized by the active site restriction result from deactivation. As was aimed here, a deactivation model (DM) can be developed by “ pseudo-steady-state ” mass balance, i.e. describing variation of available surface with time. For this purpose, bench - scale fluidized bed reactor (FBR) was operated for obtaining gasification product profiles. Gas samples were taken from the reactor effluent stream, and fed continuously to the gas analyzers for on - line simultaneous measurements of H 2 , CO 2 , CO, CH 4 and O 2 . Data were used for extracting model parameters (k // and k D ) from the linear form of DM. Experiments at temperature range of 973–1173 K were conducted. Fluidizing mixture (air and steam) entered the bed through a distributor of a 200 - mesh stainless steel sieve and fluidized the single charge of lignite with a mean particle diameter approximately 250 µm. The agreement between the experimental and predicted carbon concentrations was confirmed for DM. The latter may be successfully used to design the fluidized bed combustors or gasifiers.

中文翻译：

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流化床反应器中褐煤气化的失活动力学

摘要 褐煤气化可能以失活导致的活性位点限制为特征。正如这里的目的，失活模型 (DM) 可以通过“伪稳态”质量平衡来开发，即描述可用表面随时间的变化。为此目的，为了获得气化产物分布，操作了实验室规模的流化床反应器（FBR）。从反应器流出物中取出气体样品，并将其连续送入气体分析仪，以在线同时测量 H 2 、CO 2 、CO、CH 4 和 O 2 。数据用于从 DM 的线性形式中提取模型参数（k // 和 k D ）。在 973-1173 K 的温度范围内进行了实验。流化混合物（空气和蒸汽）通过 200 目不锈钢筛的分配器进入床层，并流化平均粒径约为 250 µm 的单次褐煤。DM 证实了实验和预测的碳浓度之间的一致性。后者可成功用于设计流化床燃烧器或气化器。