【摘要】 将煤简化为纯碳,采用Aspen软件,对煤一步制氢工艺中不同温度、压力及不同进料比等工况进行了计算,分析了温度、压力及不同进料比对最终产物的影响。结果表明,直接制氢适宜的气化温度为923～973 K;在水蒸气分压力不变的条件下增加气化压力将导致气体产物量减少,但增加水蒸气分压力(气化压力随之增加),气体产物量将增加;吸收剂有一个最佳的量;温度对直接制氢的影响大于压力,而压力对甲烷的含量有重要影响。更多还原

【Abstract】 The "Aspen" software was used to predict the performance of "Direct-Coal-to-Hydrogen" process in terms of effects of different operating parameters on the final product. In the study coal was reduced to pure carbon and factors like temperature, pressure and reactants ratio were taken into account for analysis. The results showed that: the appropriate temperature range for "Direct-Coal-to-Hydrogen" process was 923～973 K. When the partial pressure of steam was kept constant, the total quantity of product gas would decrease with the increase of gasification pressure. However, with the increase of steam partial pressure (the gasification pressure increased correspondingly), the total quantity of product gas will increase. There exists an optimum value of absorbent (CaO) proportion in feedstocks for the highest output of the process. Influence of temperature is more than that of gasification pressure on the quantity of product, but the later accounts more for methane proportion in the product gas mixture.更多还原