Chemical looping technology (CLT) is an innovative technology that involves clean and efficient conversion of hydrocarbons into power, fuel, and chemicals through oxygen carriers (OCs) by circulating between a fuel reactor (FR) and an air reactor (AR). Several processes such as chemical looping combustion (CLC), chemical looping gasification (CLG), and chemical looping reforming (CLR) have been proposed and investigated based on the various OCs. OCs act as a medium that transfers heat and oxygen, are related to their efficiency, economy, and stability of the cyclic reaction in the whole chemical looping process (CLP). In recent years, significant progress has been made in OC materials for various CLP. Particularly, multi-metal coupled high-entropy oxide oxygen carriers (HEO-OCs) and the method of using machine learning for high-throughput screening of OCs provide new perspectives for the development and application of OCs. However, there is currently a lack of review paper on the selection of suitable OCs for different CLP and different feedstock types. In this paper, the types, preparation methods and evaluation indexes of OCs are summarized, and the development methods and application cases of OCs based on the characteristics of feedstocks are mainly reviewed. It is expected to provide a better understanding for the development and utilization of OCs in the CLP. These advantages will contribute to the development of OC materials for more effective CLT.

中文翻译：

---

不同原料化学循环过程载氧体的研究进展


化学循环技术（CLT）是一项创新技术，涉及通过氧载体（OC）在燃料反应器（FR）和空气反应器（AR）之间循环，将碳氢化合物清洁高效地转化为电力、燃料和化学品。基于各种OC，人们提出并研究了化学链燃烧（CLC）、化学链气化（CLG）和化学链重整（CLR）等几种工艺。有机碳作为传递热量和氧气的介质，关系到整个化学循环过程（CLP）中循环反应的效率、经济性和稳定性。近年来，用于各种CLP的OC材料取得了重大进展。特别是多金属耦合高熵氧化物氧载体（HEO-OCs）以及利用机器学习高通量筛选OCs的方法为OCs的开发和应用提供了新的视角。然而，目前缺乏针对不同CLP和不同原料类型选择合适OC的综述论文。本文综述了有机碳的种类、制备方法和评价指标，重点综述了基于原料特性的有机碳的开发方法和应用案例。预计将为中电OC的开发和利用提供更好的了解。这些优点将有助于开发 OC 材料以实现更有效的 CLT。