Abstract:

China's industrial by-product gas emissions is large, which makes pollution to the environment, and meanwhile wastes the valuable resources such as H₂ and CO. Hydrogen is an important chemical raw material, and also is a carbon-free and high-efficiency energy. The separation and purification of hydrogen from industrial by-product gas could reduce resources waste and CO₂ emission. This article introduces the current emissions status of hydrogen-containing industrial by-product gas in China, three typical industrial hydrogen production processes, the calculation and analyses of their costs and CO₂ emissions. These three typical processes are hydrogen production from Coke Oven Gas, refinery gas, and chlor-alkali emission gas. Taking into account factors such as carbon dioxide emissions and carbon transaction costs, the comprehensive cost advantage of hydrogen production from industrial by-product gas is more competitive. In the context of carbon neutrality, hydrogen production from industrial by-product gas is an effective and feasible way to obtain low-carbon hydrogen energy. Further researches and development of industrial by-product gas hydrogen production technologies would provide an efficient way to reduce carbon emissions.

Key words: carbon emissions reduction, industrial by-product gas, hydrogen production, pressure swing adsorption, coke oven gas

摘要：

我国工业副产气排放量大，在对环境造成污染的同时，副产气中H₂、CO等有效成分随排放而浪费。氢气既是重要的化工原料，也是无碳、高效的能源，用工业副产气制备或分离提纯氢气既减少资源浪费，又可减少CO₂排放。本文介绍了我国含氢工业副产气排放情况，详述了焦炉煤气制氢、炼厂副产气制氢、氯碱尾气制氢等三种典型工业副产气制氢工艺，对煤制氢、天然气制氢、甲醇制氢及三种典型工业副产气制氢工艺的成本和CO₂排放进行了计算和整理分析。文章指出，考虑二氧化碳排放和碳交易成本等因素，与煤制氢、天然气制氢、甲醇制氢和电解水制氢相比，现阶段下工业副产气制氢的综合成本优势更加明显。在碳中和背景下，工业副产气制氢是获取低碳氢气的有效和经济的途径，研究和开发工业副产气制氢技术，将为碳减排提供一条高效路径。

关键词: 碳减排, 工业副产气, 制氢, 变压吸附, 焦炉煤气