Direct Non‐Oxidative Methane Conversion in a Millisecond Catalytic Wall Reactor
Direct Non‐Oxidative Methane Conversion in a Millisecond Catalytic Wall Reactor
复制标题
毫秒催化壁反应器中的直接非氧化甲烷转化
DOI：
10.1002/ange.201903000
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发表时间：
2019
影响因子：
--
通讯作者：
Liu, Dongxia
中科院分区：
文献类型：
--
作者：
Oh, Su Cheun;Schulman, Emily;Zhang, Junyan;Fan, Jiufeng;Pan, Ying;Meng, Jianqiang;Liu, Dongxia
直接非氧化甲烷转化（DNMC）已被认为是一种将甲烷直接转化为烯烃和高级烃的一步技术。吸热反应和焦炭沉积导致的高反应温度和低催化剂耐久性是两个主要挑战。我们证明，毫秒催化壁反应器能够实现稳定的甲烷转化率、C2+选择性、焦炭产率和长期耐久性。这些效应源于反应器壁上 DNMC 的引发以及反应器室内气相化学反应的维持。在不同温度和气体流速下获得的结果为优化轻质 C2 或更重质芳烃产品的工艺奠定了基础。 Aspen Plus 进行了过程模拟，以了解该反应器在 DNMC 中的实际影响。反应器材料实现了高碳效率和热效率以及低成本，表明了该 DNMC 技术的技术经济可行性。
Direct non‐oxidative methane conversion (DNMC) has been recognized as a single‐step technology that directly converts methane into olefins and higher hydrocarbons. High reaction temperature and low catalyst durability, resulting from the endothermic reaction and coke deposition, are two main challenges. We show that a millisecond catalytic wall reactor enables stable methane conversion, C2+selectivity, coke yield, and long‐term durability. These effects originate from initiation of the DNMC on a reactor wall and maintenance of the reaction by gas‐phase chemistry within the reactor compartment. The results obtained under various temperatures and gas flow rates form a basis for optimizing the process towards lighter C2or heavier aromatic products. A process simulation was done by Aspen Plus to understand the practical implications of this reactor in DNMC. High carbon and thermal efficiencies and low cost of the reactor materials are realized, indicating the technoeconomic viability of this DNMC technology.