A Novel Zero-Emission Process for the Co-Production of Power, Natural Gas liquid, and Carbon Dioxide Based Shale Gas
By: Zifeng Liu, Xuliang Zhao, Yongjie Qi (August 2023)
This paper introduces an integrated process designed to yield three products—carbon dioxide, power, and natural gas liquid—from shale gas, a traditionally pollutant energy source. The system is designed for zero CO2 emissions and full utilization of shale gas in product generation. This is achieved through innovative cold energy integration and hydrocarbon recovery processes. An Aspen HYSYS code simulation is used for a 4E (Energy, Exergy, Environmental, and Economic) analysis of the system.
The study indicates promising results with first and second law efficiencies of 51.29% and 80.54% respectively. The proposed structure integrates multiple components including natural gas liquids recovery unit, Allam power cycle, steam power cycle, NH3 power cycle, and an ammonia-water power cycle. Despite its complexity, the system achieves zero carbon emissions and generates a substantial amount of power—460.60 MW—at a cost of $8.36 per MWh, demonstrating its potential as a cost-effective, environmentally conscious energy solution.