CN

刘永卓

Education Level:博士研究生

Degree:工学博士

Discipline:Chemical Engineering

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煤“一步法”催化制取天然气催化剂研究

Release time:2023-10-19 Hits:

Key Words:煤化工;;甲烷化;;天然气;;催化剂;;稳定性

Abstract:在"一步法"煤制天然气中,煤粉颗粒、催化剂与水蒸气在一个反应器中同时发生煤气化和甲烷化反应,甲烷化反应放出的热量提供了煤气化反应所需的热量。在固定床反应器中,压强为2MPa,体积空速为15000/h的操作条件下,考察了不同含量的KOH对煤气化效率的影响,发现当KOH负载量为15%时对煤气化的催化效果最好。用15%的KOH和Fe制备了同时具有催化煤气化及甲烷化性能的K-Fe双组分催化剂。研究了Fe含量对煤催化性能的影响,15%KOH-10%Fe2O3对于煤气化及甲烷化均具有良好的催化活性。煤中的含硫物质释放出H2S等气体与催化剂活性组分易结合形成K3Fe10S14等难溶物,致使其寿命减短。将神木煤煤焦颗粒与白云石粉进行机械混合,有效固定了煤中的含硫物,使催化剂使用寿命得到了较大提升。

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