An industrial catalyst from laboratory to commercial production, usually goes through three consecutive stages, namely, laboratory screening, pilot plant test and full-scall plant test.

催化剂从实验室研制到进行工业生产，一般要经过实验室初步筛选、中间试验、工业装置试验三个阶段。

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At the moment only a few EGS plants exist worldwide, including a pilot plant in Soultz, France, and a small commercial plant in Landau, Germany.

ECONOMIST: Inside story: Hot rocks and high hopes | The