CO_2吸收增强气化制备氨合成原料气的可行性  

FEASIBILITY OF SYNGAS PRODUCTION VIA CO_2 ABSORPTION ENHANCED GASIFIER FOR NH3 SYNTHESIS

作　　者：王逊[1] 高峻[2] 

机构地区：[1]中国科学院先进能源动力重点实验室(中国科学院工程热物理研究所),中国科学院能源动力研究中心,北京博士副研究员100190 [2]中国城市建设研究院,北京高级工程师100120

出　　处：《煤炭转化》2013年第3期24-30,共7页Coal Conversion

基　　金：国家自然科学基金资助项目(51176186)

摘　　要：以煤和低浓度煤层气共气化制备氨合成原料气,煤层气提供合成所需的氮组分,从而取消常规制气的补氮过程或替代空气气化;采用CO2吸收增强制气,在造气工段制得φ(H2)/φ(N2)=3,φ(CO2+CO)≤0.30%,φ(H2)≥70%的粗煤气,可直接进入醇烷化或醇烃化精制岗位.为论证系统的可行性和适宜操作条件,采用热力学平衡模型分析煤气组分随制气反应条件变化的规律,提出可一步制得φ(H2)/φ(N2)=3,φ(CO2+CO)≤0.30%,φ(H2)≥70%的制气反应条件和煤层气流量;根据煤层气温度、压力与爆炸极限的关系,确定催化转化/脱氧反应器的操作参数.结果表明,以合成原料气组分衡量,基于CO2吸收增强气化的煤和低浓度煤层气制气方法可行,且有利于简化调比和气体净化过程.An alternative process of syngas production for NH3 synthesis was proposed. Syngas is made of coal and coal mine gas（CMM） by CO2 absorption enhanced gasification. Due to higher N2 content in CMM, it is possible to remove N2 supplement section or to replace air gasifi- cation by steam gasification. With the in situ absorption of CO2, the syngas compositions at gasi- fier outlet can meet the inlet contents criteria of syngas refinery section which should be φ0（H2）/ φ（N2） equals to 3 and T（CO2＋CO）less than 0.30%. In order to analyze the feasibility and opera- tion conditions of the proposed process, syngas production reactor was simulated by thermody- namic model, from which the variation of syngas compositions with operation parameters were studied. Based on this work, it is able to determine the suitable operation parameters for gasifier operation and corresponding CMM flow rate. Considering the explosion limits variation of pres- surized CMM, the feasible parameters for 02 removal reactor operation was calculated. Analysis results show that it is feasible to produce syngas for NH3 synthesis by coal and CMM co-gasifica- tion with in situ CO2 capture. Moreover, it is advantage to simplify components adjustment sec- tion and syngas purification section.

关 键 词：CO2吸收增强制气 煤和煤层气共气化 CO2+CO含量 氢氮比 制气操作条件 煤层气脱氧 

分 类 号：TQ546[化学工程—煤化学工程] TQ536