# Heterogeneous catalytic hydrogenation reactions in continuous-flow reactors.
> 連続フロー反応器における不均一系触媒水素化反応の技術的展望


## Abstract

This review article surveys recent advances in heterogeneous catalytic hydrogenation conducted under continuous-flow conditions using molecular hydrogen. Microreactor technology and flow processing are highlighted as approaches that improve both the economic efficiency and environmental profile of organic synthesis. The gas-liquid-solid triphasic reaction environment inherent to flow hydrogenation confers distinct advantages over conventional batch methods. The article systematically covers available flow hydrogenation techniques, reactor configurations, frequently employed catalysts, and representative laboratory-scale synthetic applications.

### Mechanism

Molecular hydrogen contacts heterogeneous solid catalysts within a gas-liquid-solid triphasic continuous-flow environment, enabling more efficient hydrogenation compared to batch processing due to enhanced mass transfer at phase interfaces.

## Bibliographic

- **Authors**: Irfan M, Glasnov TN, Kappe CO
- **Journal**: ChemSusChem
- **Year**: 2011 (2011-03-21)
- **PMID**: [21337528](https://pubmed.ncbi.nlm.nih.gov/21337528/)
- **DOI**: [10.1002/cssc.201000354](https://doi.org/10.1002/cssc.201000354)
- **Study type**: review
- **Delivery route**: not specified
- **Effect reported**: not assessed

## Delivery context

The delivery route is not clearly identifiable from this paper. For hydrogen intake, inhalation is the most efficient route; inhalation, however, carries explosion risk (empirical LFL of 10%; high-concentration devices are not recommended).

## Safety notes

The delivery route is not clearly identifiable from this paper. For hydrogen intake, inhalation is the most efficient route; inhalation, however, carries explosion risk (empirical LFL of 10%; high-concentration devices are not recommended).

See also:
- [Inhalation concentration and LFL / UFL](https://h2-papers.org/en/safety-notes/inhalation-concentration)
- [Consumer Affairs Agency accident cases](https://h2-papers.org/en/safety-notes/accident-cases)

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> **Cite as**: H2 Papers — PMID 21337528. https://h2-papers.org/en/papers/21337528
> **Source**: PubMed PMID [21337528](https://pubmed.ncbi.nlm.nih.gov/21337528/)