MgCl₂-loaded activated carbons were prepared by ultrasonic impregnation method for the application in ammonia enrichment or ammonia decomposition process. Anhydrous magnesium chloride (MgCl₂) was selected as an active promoter for ammonia adsorption, and cyclic adsorption performance was comparatively analyzed according to MgCl₂ loading (3–20 wt% in Mg basis). The physical and chemical properties of the adsorbents were analyzed by TGA, BET, SEM, EDX, and NH₃-TPD. The adsorption and desorption characteristics were analyzed via temperature swing (TSA), pressure swing (PSA), and pressure-temperature swing (PTSA) mode breakthrough tests. It was confirmed that 10 wt% Mg loaded adsorbent (AC-Mg(10)) among the prepared sorbents showed the best performance in the cyclic adsorption process, showing the ammonia capacity of 2.461 mmol NH₃/g in TSA mode operation. Even though the capacity was lower (around 1 mmol NH₃/g) in PSA mode, the PSA mode operation was very attractive due to its stable and convenient operation conditions. The ammonia desorption temperature for TSA and PTSA mode operation was determined based on the van’t Hoff equation which define equilibrium pressure and temperature of three sequential reaction of MgCl₂ with ammonia. PTSA mode breakthrough test showed the excellent performance even with a mild increase of temperature for desorption. AC-Mg(10) showed a remarkable adsorption capacity of 4.062 mmol NH₃/g in the first cycle at an elevated pressure. When a mild temperature, 393 K, was applied for desorption, the cyclic adsorption capacity of 2.769 mmol NH₃/g was achieved, which exceeded the one in TSA mode operation.

采用超声浸渍法制备负载MgCl ₂的活性炭，用于氨富集或氨分解过程。选择无水氯化镁（MgCl ₂）作为氨吸附的活性促进剂，并根据MgCl ₂负载量（以Mg计为3-20 wt％）比较分析循环吸附性能。_{采用TGA、BET、SEM、EDX和NH 3}对吸附剂的理化性质进行分析-TPD。通过变温（TSA）、变压（PSA）和变压（PTSA）模式突破测试分析了吸附和解吸特性。经证实，在所制备的吸附剂中，负载 10 wt% Mg 的吸附剂（AC-Mg(10)）在循环吸附过程中表现出最佳性能，在 TSA 模式下的氨容量为 2.461 mmol NH _{3 /g。}尽管 PSA 模式下的容量较低（约 1 mmol NH ₃ /g），但 PSA 模式操作由于其稳定和方便的操作条件而非常有吸引力。TSA 和 PTSA 模式操作的氨解吸温度基于定义 MgCl _{2三个连续反应的平衡压力和温度的 van't Hoff 方程确定}与氨。PTSA 模式突破测试表明，即使在解吸温度温和升高的情况下也具有出色的性能。AC-Mg(10)在高压下的第一个循环中显示出4.062 mmol NH ₃ /g的显着吸附能力。在393 K的温和温度解吸时，循环吸附量达到2.769 mmol NH ₃ /g，超过了TSA模式操作。