Coal-assisted water electrolysis for hydrogen production: evolution of carbon structure in different-rank coal (original) (raw)

Energy & Fuels, 2021

Abstract

Understanding the evolution of carbon structure in coal-assisted water electrolysis for hydrogen production (CAWE) is essential for seeking strategies to improve the rate of CAWE and getting more insight into the potential significance of CAWE. In this study, 13C nuclear magnetic resonance (NMR) is used to understand the evolution of carbon structure in the CAWE. First, the electrolysis characteristics of three different-rank coals are revealed by using electrochemical methods. After then, before and after electrolysis, the evolution of carbon structure is analyzed. The results show that CAWE is a process of reducing carbon and increasing oxygen, and the accumulation of oxygen-containing groups is mainly owing to the increase of oxygen aliphatic carbons and oxygen aromatic carbons. After the CAWE, the aromatic cluster size decreases and increases for low-rank coals and high-rank coals, respectively.

Wei Zhou hasn't uploaded this paper.

Let Wei know you want this paper to be uploaded.

Ask for this paper to be uploaded.