本研究之主要目的為製備適合化學迴圈程序與應用於產氫之鐵系複合載氧體。為了製備具有高機械強度之複合載氧體，分別將氧化鐵與氧化鋁和二氧化鈦混合，並利用壓錠方式製備成錠材。研究結果發現鐵鋁複合載氧體及鐵鈦複合載氧體分別在鍛燒溫度1300 oC與1100 oC下，具有相當好的機械強度與反應性。本研究為了增加錠狀鐵系複合載氧體之反應性，添加不同比例澱粉含量，其研究結果發現隨著澱粉含量增加，鐵鋁複合載氧體的轉化率會逐漸上升，但是鐵鈦複合載氧體的轉化率幾乎不受到澱粉含量增加而有所影響。當鐵鋁複合載氧體之澱粉含量為10 wt%時及鐵鈦複合載氧體之澱粉含量為0 wt%時，皆具有相當不錯的反應性與機械強度，但是經過20圈的氧化還原操作後，鐵鈦複合載氧體之機械強度會有所下降。此外，在20圈的氧化還原後，錠狀複合載氧體表面皆觀察不到惰性載體，其推測為在氧化過程中鐵離子會向外擴散與外部氧離子反應形成氧化鐵進而覆蓋惰性載體，導致在多次氧化還原後，錠狀載氧體表面皆觀察不到惰性載體。
本研究亦將鐵鋁複合載氧體與鐵鈦複合載氧體分別置入固定床反應器進行產氫測試，實驗結果顯示鐵鋁複合載氧體之產氫量是鐵鈦複合載氧體的1.13倍，鐵鈦複合載氧體在多次與水氣氧化後與反應器會有燒結的情況發生，因此可推論鐵鋁複合載氧體為一具有良好反應性與產氫能力的載氧體之一。

Preparation of Fe-based oxygen carriers with support materials as pellets for CLP and hydrogen production was investigated in this study. In order to increase the mechanical strength of carriers, Fe2O3 oxygen carriers were prepared with Al2O3 and TiO2 as inert support with mass ratio of 60/40 by mechanical mixing and pelletized by tablet machine, respectively. The results showed that FeAl320 pellet sintered at 1300 oC had proper mechanical strength and good reactivity. Besides, the FeTi320 pellet sintered at 1100 oC also exhibited adequate mechanical strength and great reactivity.
For increasing reactivity of FeAl320 pellet and FeTi320 pellet, different starch content was added to the pellets. It revealed that the conversion was increased with increasing starch of FeAl320 pellet and the starch was no effect on FeTi320 pellet. However, FeAl320-S10 and FeTi320-S0 pellet showed reasonable reactivity, but mechanical strength of FeAl320-S10 pellet exhibited better than FeTi320-S0 pellet after 20 redox cylces. Furthermore, both of 20 redox cycles FeAl320 pellet and FeTi320 pellet, it was no observed the support materials on the pellet surface of oxygen carriers. It could be possibly suggested that the iron cations may diffuse onto the surface of oxygen carriers and react with oxygen anions during the oxidation period.
Comparison the H2 productions between FeAl320-S10 pellet and FeTi320-S0 pellet, it could be obviously observed that the amount of H2 production of FeAl320-S10 pellet is 1.13 times as large as FeTi320-S0 pellet. However, it would be clearly observed the FeTi320-S0 pellet could be sintered together and agglomerated to wall of fixed bed reactor after multi-steam oxidation cycle. As the above results, it could be summarized that FeAl320-S10 pellet has proper reactivity and has good H2 production at 900 oC and FeAl320-S10 pellet could be a suitable candidate of H2 production for CLP.

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