C2 · 27 words
Catalysis in German
The words of the laboratory and the plant for speeding a reaction up without being used up in it.
Practise this list
From these 27 words, as many per round as you like — up to all of them: first what is due today, then new ones. First you choose, then you fill the gap, then you write it yourself. Mistakes come back again shortly.
More about this list
One word on this list leads a double life, and the business pages will have taught you the wrong half. In commercial German der Umsatz is turnover in the shopkeeper’s sense: the takings of a firm over a year. In a laboratory or a plant it is the conversion — the share of the starting material, das Edukt, that has actually reacted. Der Umsatz ist zu niedrig in a lab report therefore means that too much went through the reactor untouched; nobody has lost any money. The verb splits the same way: umsetzen is to put a plan into practice or to shift goods, and here it is to turn one substance into another. Even the compound is not safe. In the singular, die Umsatzzahl is how often one active site gets through its cycle before it gives out; in the plural, in a company report, die Umsatzzahlen are simply the sales figures. The sentence around it always decides.
The words
Verb (7)
umsetzento convert (in a reaction)VerbC2
Separable: setzt … um, umgesetzt. The product follows zu with the dative.
adsorbierento adsorbVerbC2
The surface takes an with the dative. Not absorbieren, which takes something into the bulk.
desorbierento desorbVerbC2
verkokento coke upVerbC2
Also transitive: Kohle verkoken, to turn coal into coke.
regenerierento regenerateVerbC1
Also reflexive: sich regenerieren, to recover.
anspringento light off (of a catalyst)VerbC2
Separable; perfect with sein. Also of an engine: der Motor springt an.
hydrierento hydrogenateVerbC2
Adds hydrogen, not water; to hydrate is hydratisieren.
Noun (20)
Grammar for these: The three genders · The plural
der KatalysatorcatalystNounC1
Plural: die Katalysatoren. In everyday speech also the catalytic converter of a car, short: der Kat.
die Aktivierungsenergieactivation energyNounC2
Usually singular.
die Reaktionsgeschwindigkeitreaction rateNounC1
Plural: die Reaktionsgeschwindigkeiten.
das Eduktreactant, starting materialNounC2
Plural: die Edukte. The counterpart of das Produkt.
der Übergangszustandtransition stateNounC2
Plural: die Übergangszustände.
das ZwischenproduktintermediateNounC2
Plural: die Zwischenprodukte. In industry also a semi-finished product.
die Umsatzzahlturnover numberNounC2
Plural: die Umsatzzahlen, which in business are sales figures.
die SelektivitätselectivityNounC2
Usually singular.
die Raum-Zeit-Ausbeutespace-time yieldNounC2
Product per reactor volume and hour. Plural rare.
die Nebenreaktionside reactionNounC2
Plural: die Nebenreaktionen.
das Trägermaterialsupport material (for a catalyst)NounC2
Plural: die Trägermaterialien.
die Aktivkomponenteactive componentNounC2
Plural: die Aktivkomponenten.
das Edelmetallprecious metal, noble metalNounC1
Plural: die Edelmetalle.
der Promotorpromoter (in catalysis)NounC2
Plural: die Promotoren. Barely active itself; it boosts the catalyst.
die ChemisorptionchemisorptionNounC2
No plural. The weaker counterpart is die Physisorption.
das Katalysatorgiftcatalyst poisonNounC2
Plural: die Katalysatorgifte. Neuter, after das Gift.
die DesaktivierungdeactivationNounC2
The chemists’ spelling; elsewhere die Deaktivierung.
der Festbettreaktorfixed-bed reactorNounC2
Plural: die Festbettreaktoren.
die Wirbelschichtfluidised bedNounC2
Plural: die Wirbelschichten.
der Dreiwegekatalysatorthree-way catalytic converterNounC2
Plural: die Dreiwegekatalysatoren.
Missing a word? Look it up in the dictionary
This list belongs to Science and research — 21 lists and 754 words that can also be practised as a whole.