“The cost of CO2 capture is high because of the stream and energy consumption in the regeneration tower” said Lianbo Liu from Huaneng Group Clean Energy Research Institute. “The capital cost of CO2 capture can be lowered with long-term development, while the operation cost can hardly be reduced under current technical conditions”. Therefore, it was recommended that Guangdong focuses on the development of regeneration technologies. The MBR system, a membrane separation technology, can reduce operation costs significantly by cutting the energy consumption of the system by 15-20%. Moreover, this technology can avoid steam loss by recycling the steam in the bottom of the regeneration tower.
Jian Wang and Richard Smith from Howden also introduced their cost reduction strategies for CO2 capture. Howden’s main products are high integrity fans, heat exchangers and compressors which demand the highest levels of efficiency, reliability and availability. They operate in a wide range of CO2-intensive industries, with 49% of its business being in the power industry. Howden has been particularly active in developing equipment for worldwide CCUS demonstration projects, including the Kemper County and Dongguan IGCC projects. Currently they are in the process of developing next generation CO2 capture equipment, such as the swing solid absorption technology and mechanical recompression technology, aiming at reducing long time energy consumption and cost.
Hyungwoon Ahn from the University of Edinburgh introduced an improved industrial hydrogen plant with CO2 capture (H2 CCS). Evaluation of this new technology showed 4% higher H2 recovery and a reduction of power consumption at the CO2 capture unit and the CO2 compression unit. H2 CCS is found to be the most promising option for CO2 capture at refineries. The additional cost for implementing the H2 CCS technology, arising from the piping, would be marginal.
Shell Cansolv, represented by John Zhang, introduced the Shell Cansolv regenerable CO2 capture technologies and their application. Shell licenses a patented commercial technology to reduce the SO2 and CO2 emissions from large scale emitters. Shell Cansolv claims that their technologies allow for stringent emissions standards to be reached at much lower capital and operating costs than non-regenerable technologies.