And this is usually done over catalysts, like an iron oxide catalyst or something.

经常还需要一些催化剂，像氧化铁催化剂或其它东西用。

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The performance of oxide catalyst for naphtha cracking was studied in a fixed-fluidized bed reactor.

使用固定流化床，考察了氧化物催化剂催化裂解石脑油制乙烯的反应。

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To abate the pollution of industrial waste gases, containing CO and organic hydrocarbons, a copper-rare earth oxide catalyst of monolithic form was developed.

研究了含铜-稀土氧化物的非贵金属蜂窝状催化剂，目的是用于含烃类工业废气的净化。

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Prices have soared: the cost of cerium oxide (often used as a catalyst) has increased sixfold since the start of the year, and is 20 times higher than in 2005.

ECONOMIST: Rare earths and China

Moreover, soil containing biochar releases less methane and less nitrous oxide than its untreated counterparts, probably because the charcoal acts as a catalyst for the destruction of these gases.

ECONOMIST: Biochar could enrich soils and cut greenhouse gases as well

One company exploits this phenomenon by making nanoparticles of the compound cerium oxide, which in that form are chemically reactive enough to serve as a catalyst.

ECONOMIST: Small wonders