CO2/H2/H2O Hydrate Formation with TBAB and Nanoporous Materials

Nanoporous materials can significantly promote the formation process of gas hydrate by reducing the barrier of physical chemistry. In this work, the CO2/H2/H20 hydrates formation with tetra-n-butyl ammonium bromide (TBAB) and nano A1203 or carbon nano tube (CNT) were studied and compared in term of kinetic curves. It was found that both TBAB-A1203 and TBABCNT could promote the CO2/H2/H20 hydrate formation process. Furthermore, compared with TBAB-A1203, TBAB-CNT has the better promotion effect on the CO2/H2/H20 hydrate formation process. It is interesting that the CO2/H2/H20 hydrate formation process with TBAB-A1203 represents reformation phenomenon. It possibly forms sI CO2/H2/H20 hydrate firstly and finally forms semiclathrate CO2/H2/H20 hydrate. (C) 2019 The Authors. Published by Elsevier Ltd.