Enhanced Hydrogen Production Process from Coal Integrated with CO_2 Separation Using Dual Chemical Looping

由于碳还原CuO是一种放热反应，有利于产氢过程的能量平衡，因此氧化铜是一种合适的氧载体材料。用氧化铜和石墨的干混合物进行热重测试，结果表明，在600℃左右，其重量变化很快。以硅酸锂为吸附剂，在不同C/CuO比和蒸汽质量流量条件下，在600℃左右的气化条件下，证实了石墨的制氢效果，并证明了吸附剂在非平衡状态下对反应的促进作用。

Copper oxide is one of the suitable materials for oxygen carrier because reduction of CuO by carbon is exothermic reaction which benefits energy balance in the proposed hydrogen production process. The result of thermogravimetry test using dry mixtures of copper oxide and graphite showed rapid weight change at around 600℃. Hydrogen production from graphite was confirmed at around 600℃ by the gasification test in combination with Lithium Silicate used as CO_2 sorbent under the condition of various C/CuO mixture ratio and steam mass flow, and this result showed reaction promotion effect derived from non-equilibrium state by CO_2 absorption.