Evaluating the risk of hydrate formation in CO2 pipelines under transient operation

A numerical study on the non‐isothermal flow characteristics and hydrate risk of CO2 in buried transmission pipelines under the gas‐phase transportation mode

“…Large‐scale CCS projects require a large amount of CO 2 to be transported . However, the formation of CO 2 hydrates becomes a major problem, affecting the safety of CO 2 pipeline transportation . The formation and deposition of hydrate shrinks the passageway of the airflow and reduces the transportation efficiency, and the huge volume of hydrate causes pipeline blockage and rupture accidents .…”

“…[9][10][11][12][13] However, the formation of CO 2 hydrates becomes a major problem, affecting the safety of CO 2 pipeline transportation. [14][15][16][17] The formation and deposition of hydrate shrinks the passageway of the airflow and reduces the transportation efficiency, and the huge volume of hydrate causes pipeline blockage and rupture accidents. [18][19][20][21][22][23][24][25][26][27][28][29][30][31][32] Moreover, compared with natural gas, which is mainly composed of methane, CO 2 can form solid hydrates at relatively lower pressures and higher temperatures.…”

Experimental investigations into the transient behaviours of CO2 in a horizontal pipeline during flexible CCS operations

“…CCS technology has three parts, which are capture, transport and storage, and pipelines are considered to be the most viable solution for large volume CO2 transportation (Onyebuchi et al, 2018). Transient conditions occur in the pipeline during flexible CCS operations, which result in phase transition of CO2, flow instability and hydrate formation (Uilhoorn, 2013). It is therefore necessary to investigate the transient behaviours of CO2 in the pipeline for the optimization of CCS operations and earlier work on the numerical simulations of transient CO2 flow are available.…”

Simulation of Glycol Processes for CO2 Dehydration

“…Water may lead to problems like corrosion and hydrate formation. The need for water removal from CO2 and possible specifications are discussed in several references (Cole et al, 2011;Uilhorn, 2013;Buit, 2011) and water specifications are normally in the range between 5 and 500 ppm (parts per million by volume). CO2 for enhanced oil recovery normally requires the lowest water content.…”