Blending hydrogen into natural gas pipelines and then extracting it is one of the main solutions for large-scale, long-distance hydrogen transport, offering high throughput and low cost. At the same time, blending hydrogen into natural gas pipelines can effectively reduce carbon emissions.
The company recently delivered an experimental membrane-separation hydrogen extraction unit to China General Research Institute for Non-Ferrous Metals, with State Power Investment Corporation as the end user. Our membrane separation unit can effectively extract 5%–30% blended hydrogen from natural gas pipelines, with an extraction efficiency above 95%.
Figure 1: On-site control interface
The relatively high-concentration hydrogen obtained via membrane separation (typically up to 95% mol) is further purified to 99.999% mol (5N) using a well-established PSA unit, meeting the purity requirements of nearly all downstream applications. For use in semiconductor and related fields, 5N-purity hydrogen can be further purified via a final-stage purifier (e.g., getter-type, palladium tube/membrane-type, or high-performance adsorbent-type) to 99.99999%–99.9999999% mol (7N–9N), meeting the demanding impurity requirements of semiconductor processes.
Looking ahead, to meet the large-scale application needs of hydrogen blending and extraction from natural gas pipelines, the company has more advanced, more energy-efficient technologies in reserve, committed to advancing hydrogen energy development and carbon reduction.
