Direct Non‐Oxidative Methane Conversion in a Millisecond Catalytic Wall Reactor

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 challen...

Full description

Saved in:
Bibliographic Details
Published in:Angewandte Chemie International Edition 2019-05, Vol.58 (21), p.7083-7086
Main Authors: Oh, Su Cheun, Schulman, Emily, Zhang, Junyan, Fan, Jiufeng, Pan, Ying, Meng, Jianqiang, Liu, Dongxia
Format: Article
Language:English
Subjects:
Alkenes
Catalytic converters
Coke
Conversion
Durability
Endothermic reactions
Flow velocity
Gas flow
heterogeneous catalysis
iron
Methane
methane conversion
natural gas
Organic chemistry
Reactor materials
Reactors
Selectivity
supported catalysts
Technology
Viability
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary: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 C2 or 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. Wall to wall: The upgrade of CH4 by direct non‐oxidative methane conversion is facilitated by a Fe/SiO2 millisecond catalytic wall reactor. The reactor design results in stable methane conversion, C2+ selectivity, coke yield, and long‐term durability.
ISSN:1433-7851
1521-3773
DOI:10.1002/anie.201903000