Abstract

The CLOU performance of the CaTi_xMn_0.9−xMg_0.1O₃ (CMTM) perovskite-type system was investigated, comparing materials produced at laboratory scale with those made at industrial ton scale. The CLOU and conversion performances were studied by a micropacked bed reactor, and crystalline phase structure and homogeneity and bulk density identified as the most important parameters affecting the performance of the OCM. Bulk density is correlated with the sintering temperature, atmosphere and time at sintering temperature, while phase homogeneity is a function of the raw materials chosen, agglomeration method and sintering procedure. Specific challenges are identified in the control of slurry homogeneity and sintering conditions in upscaled production. The degree of sintering affects the chemo-mechanical properties of the material (crushing strength and attrition index), physical properties (specific surface area), and more importantly the crystalline phases formed and their homogeneity: the quantity of “active” crystalline phases present directly determines the thermochemical conversion properties (i.e., CLOU capacity and methane conversion), oxygen transfer capacity and kinetics.

Graphic abstract

The fabrication parameters of the otherwise same ingredients result in quite different morphology and quality of performance in large scale.

中文翻译：

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制备工艺参数显着影响钙钛矿型氧载体材料（OCM）在与氧解偶联（CLOU）的化学环化中的性能

摘要

CaTi _x Mn _0.9−x Mg _0.1 O ₃的CLOU性能研究了（CMTM）钙钛矿型系统，将实验室规模的材料与工业吨级的材料进行了比较。通过微填充床反应器研究了CLOU和转化性能，结晶相结构，均质性和堆积密度被确定为影响OCM性能的最重要参数。堆积密度与烧结温度，气氛和烧结温度下的时间有关，而相均匀性则取决于所选择的原料，附聚方法和烧结程序。在规模化生产中控制浆料均质性和烧结条件时发现了具体挑战。烧结程度会影响材料的化学机械性能（抗碎强度和磨损指数），

图形摘要

否则，相同成分的制造参数会导致大规模的形态和性能质量完全不同。