Abstract

Published data on noncatalytic pyrolysis of natural gas in molten metals are analyzed. The most illustrative results obtained in the past two decades are described. The use of molten metals as reaction medium allows solving the problem of coking of pyrolysis reactors owing to the flotation of the carbon formed to the molten metal surface. The use of liquid metal bubbling reactors allowing the process to be performed at temperatures of up to 1200°С is considered. The maximal conversion was 78% at 1175°С and feeding rate of 50 mL min^–1. The major factors favoring more complete conversion of natural gas in the processes under consideration are elevated temperature, decreased gas bubble size due to the use of bubbling systems of various types, and longer residence time of the gas in the heat carrier due to an increase in the reactor length or to use of various types of packing.

中文翻译：

---

甲烷热解制氢：使用熔融金属的特定特征

摘要

分析了熔融金属中天然气的非催化热解公开数据。描述了过去二十年来获得的最具说明性的结果。使用熔融金属作为反应介质可以解决由于形成在熔融金属表面上的碳的浮选而导致的热解反应器结焦的问题。考虑使用液态金属鼓泡反应器，以允许该工艺在高达1200°C的温度下进行。在1175°С时最大转化率为78％，进料速率为50 mL min ^–1。在所考虑的过程中，有利于天然气更完全转化的主要因素是温度升高，由于使用各种类型的鼓泡系统而导致的气泡尺寸减小，以及由于气体温度升高而使气体在热载体中的停留时间更长。反应器的长度或要使用各种填料。