CEC/ICMC 2025 Abstracts & Technical Program

Session

C2Po1D - Ortho-Parahydrogen Conversion

20 May 2025, 09:15

Exhibit Hall, Tuscany Ballroom

Conveners

C2Po1D - Ortho-Parahydrogen Conversion

• Sebastian Eisenhut (Technische Universität Dresden)

450. C2Po1D-01: Magnetic field acceleration of catalyzed para- to orthohydrogen conversion for cooling superconducting motors

Thomas J Hughes (Monash University)

20/05/2025, 09:15

Poster

The cryogenic boil-off from liquid hydrogen can be utilized to harness the endothermic para- to orthohydrogen quantum state conversion, providing cooling, for example to superconducting motors, thereby enabling high efficiency sustainable transportation. Magnetic catalysts, such as Fe2O3, are used to accelerate the rate of parahydrogen conversion to achieve higher cooling rates. However, the...

386. C2Po1D-02: Improving the activation of ortho-para hydrogen conversion catalysts for hydrogen liquefaction: Effects of pre-treatment on the performance of Ionex OP

Dr Thomas J Hughes (Monash University)

20/05/2025, 09:15

Poster

The storage and handling of liquid hydrogen (LH₂) are critical components of cryogenic hydrogen engineering, particularly as LH₂ is poised to play a pivotal role in future energy systems. At ambient temperature, hydrogen gas consists of approximately 75 % ortho-hydrogen and 25 % para-hydrogen. However, at the normal boiling point of LH₂ (20.3 K), the equilibrium para-hydrogen concentration...

195. C2Po1D-03: Screening of ortho-parahydrogen catalysts

Sebastian Eisenhut

20/05/2025, 09:15

Poster

The growing demand for liquefied hydrogen (LH2) results in an increased need for ortho-parahydrogen catalysts. Currently, the LH2 supply chain relies heavily on a single catalyst product: hydrous ferric oxide, commercially available as “Ionex-Type O-P Catalyst” (Ionex) from Molecular Products. On the one hand, this reliance poses a supply vulnerability for liquefaction plants under...

95. C2Po1D-04: Experimental Investigation and Performance Evaluation of Catalysts-Filled Plate-Fin Heat Exchangers for Hydrogen Liquefaction

Junjie Teng (Zhejiang University)

20/05/2025, 09:15

[CEC-09] Applications: Hydrogen and LNG

Poster

Cryogenic hydrogen plate-fin heat exchangers (PFHXs) with continuous ortho-para hydrogen conversion are crucial for large-scale, efficient hydrogen liquefaction. However, most existing research relies on numerical methods, and detailed experimental data under cryogenic conditions remain scarce. To address this gap, experiments on catalysts-filled plate-fin heat exchangers (CPFHXs) were...

100. C2Po1D-05: Test platforms for ortho-para hydrogen conversion at cryogenic conditions

Xinyu Wei (zhejiang university), Mr Junjie Teng (Zhejiang University)

20/05/2025, 09:15

Poster

Large-scale, low-energy-consumption hydrogen liquefaction technologies are crucial for the widespread adoption of liquid hydrogen. However, fundamental data on continuous ortho-para hydrogen conversion at cryogenic temperatures remain limited. To address this, a series of test platforms has been established to investigate ortho-para hydrogen conversion under a wide range of cryogenic...

210. C2Po1D-06: Design and Optimization of Efficient Catalyst-filled Spiral Wound Heat Exchangers for Large-Scale Hydrogen Liquefaction Systems

Hanwei Zhang

20/05/2025, 09:15

Poster

It seems to have become a consensus that spiral wound heat exchangers are more suitable for large-scale cryogenic liquefaction processes than plate-fin heat exchangers, based on the mature experience of LNG industry. In the hydrogen liquefaction systems, the most advanced continuous catalytic technology integrates the exothermic conversion process of orthohydrogen to parahydrogen within the...