Traditional gas purifiers using fixed powder beds waste 80–90% of the reactive material — only the surface layers participate in capturing impurities, while the bulk remains unreacted. This paper introduces a fundamentally new approach: mechanochemical activation of reactants directly in the gas stream.

Two novel apparatus designs are presented. The mechanochemical sorption apparatus uses a milling cutter to continuously produce fresh, defect-saturated reactive powder from a metal ingot inside the gas purification column. The reactive sorber takes a different approach — gentle surface scrubbing of granular reactants with a magnetic stirrer continuously exposes fresh metal surface.

The results are striking: the coefficient of reactant utilization increases from the typical 10–20% to nearly 100%. Estimates show that purification costs can be reduced by more than 10,000 times compared to current fixed-bed methods.

The consumable reactants — alloys of Ca, Li, and Mg — are inexpensive, non-toxic, and abundant, with melting temperatures 4–5 times lower than traditional transition metal getters (Ti, V, Zr), further reducing production costs.

Citation

Chuntonov, K., Verbitsky, B., Ivanov, A.O. & Kozhevnikov, V.L. (2018). Mechanochemical Methods in the Production of High Purity Gases. Materials Sciences and Applications, 9(5), 489-501.

  • US 9,095,805 — Sorption Apparatuses for the Production of Pure Gases (2015)
  • US 9,586,173 — Activationless Gas Purifiers with High Sorption Capacity (2017)
  • WO 2020/035847 — Gas Purification by Method of a Rotating Autoclave (2020)