Multifunctional perovskite-type oxides (ABO₃) with flexible chemical tailoring characteristics and unique physical properties, are attracting an ever-increasing attention of scientists in the field of biomass chemical looping gasification process. Barium substituted lanthanum ferrite La_1-xBa_xFeO₃ (x = 0, 0.3, 0.5, 0.7, 0.9, 1.0) with perovskite structure was used as oxygen carrier for algae chemical looping catalytic steam gasification (CLCSG) process for the first time. The effects of the Ba-substitution, mass ratio of perovskite and algae (P/A), temperature and water injection rate on the gasification performance were investigated. Results showed that the activity of LaFeO₃ was dramatically improved by Ba substitution due to the formation of Fe⁴⁺/Fe³⁺ and oxygen vacancies. Among all the doped LaFeO₃ perovskites, La_0.3Ba_0.7FeO₃ (L3B7F) exhibited the best performance and gave highest syngas yield, carbon conversion and gasification efficiency. A maximum syngas yield of 1.00 m³/kg-Algae, carbon conversion of 98.86% and gasification efficiency of 96.71% were obtained at 900 °C with a water injection rate of 0.3 ml/min. Continuous high syngas yield and carbon conversion were observed during the cyclic redox tests.

多功能钙钛矿型氧化物（ABO ₃）具有灵活的化学剪裁特性和独特的物理性质，正在引起生物质化学循环气化过程领域科学家们越来越多的关注。 具有钙钛矿结构的钡取代镧铁氧体La _{1- x} Ba _x FeO ₃ ( x = 0, 0.3, 0.5, 0.7, 0.9, 1.0)首次用作藻类化学循环催化蒸汽气化(CLCSG)工艺的氧载体. 研究了Ba取代、钙钛矿与藻类的质量比(P/A)、温度和注水速率对气化性能的影响。结果表明，LaFeO ₃的活性由于 Fe ⁴⁺ /Fe ³⁺和氧空位的形成，Ba 取代了显着改善。在所有掺杂的 LaFeO ₃钙钛矿中，La _0.3 Ba _0.7 FeO ₃ (L3B7F) 表现出最好的性能，并具有最高的合成气产率、碳转化率和气化效率。在 900 °C 和 0.3 ml/min 的注水速率下获得了 1.00 m ³ /kg-Algae的最大合成气产量、98.86% 的碳转化率和 96.71% 的气化效率。在循环氧化还原测试期间观察到持续的高合成气产率和碳转化率。