Method for preparation of synthesis gas from upgraded coal

The invention discloses a method for preparation of synthesis gas from upgraded coal. Gasification reduction process is carried out on low-rank coal to obtain upgraded coal, the upgraded coal reacts with saturated water vapor, so that the upgraded coal reacts with water vapor under anaerobic or micro-aerobic condition, thereby obtaining synthesis gas containing CO and H2. According to the method,low-rank coal is subjected to gasification reduction to obtain upgraded coal with few volatile components and impurities, the upgraded coal itself has certain temperature, the upgraded coal reacts with water vapor, so that the upgraded coal reacts with water vapor under anaerobic or micro-aerobic condition to prepare the synthesis gas containing CO and H2. The prepared synthesis gas contains CO and H2 with high mole ratio, also the impurities are few, the quality is high, and the energy consumption is low, and coal in the low-rank coal is fully and effectively utilized. 本发明公开一种提质煤制合成气的方法，低阶煤通过气化还原工艺制备得到提质煤，所述提质煤与饱和水蒸气