摘要
以工业甲醇制氢装置的工艺参数为基础,利用Aspen Plus软件建立了甲醇水蒸气重整制氢工艺模型,对甲醇制氢过程的反应热力学进行探讨,分析各主要工艺参数对制氢过程中能耗、物耗、成本和碳排放强度的影响。结果表明:反应温度升高有利于甲醇转化率的提升,但会导致CO选择性上升而氢气产率下降;在温度为240℃、压力为1.5 MPa、水醇摩尔比为1.8、变压吸附(PSA)单元氢气收率为90%的优化工况条件下,甲醇水蒸气重整制氢过程的甲醇单耗、综合能耗、碳排放强度和氢气成本分别为5.96 kg kg、1185.98 kgOE t(1 kgOE=41.8 MJ)、10.45 kg kg和17.46元kg;较高的反应压力和PSA单元氢气收率、较低的水醇摩尔比和反应温度有利于甲醇制氢过程的节能减排;而从氢气成本的角度出发,对甲醇水蒸气重整制氢过程影响由强到弱的顺序为:PSA单元氢气收率>水醇摩尔比>反应压力>反应温度。
Based on the processing parameters of industrial hydrogen production from methanol,a process model of hydrogen production from methanol steam reforming was established by using Aspen Plus software.The reaction thermodynamics of methanol steam reforming was discussed,and the effects of various parameters on energy consumption,material consumption,hydrogen cost,and CO_(2)emission intensity in the hydrogen production process were analyzed.The results showed that the conversion of methanol increased with the increase of reaction temperature,but the CO selectivity increased and the hydrogen yield decreased.Under the optimum conditions of a temperature of 240℃,a pressure of 1.5 MPa,a molar ratio of water to alcohol of 1.8,and a PSA unit H_(2)yield of 90%,the methanol consumption,comprehensive energy consumption,CO_(2)emission intensity and hydrogen cost of the process were 5.96 kg kg,1185.98 kgOE t(1 kg OE=41.8 MJ),10.45 kg kg and 17.46 Yuan kg,respectively.Higher reaction pressure and PSA unit H_(2)yield,lower molar ratio of water to alcohol and reaction temperature were beneficial to energy saving and CO_(2)emission reduction in the process of methanol hydrogen production.The order of influence on hydrogen production by steam reforming of methanol dereases as follows:H_(2)yield of PSA unit>molar ratio of water to alcohol>the reaction pressure>the reaction temperature.
作者
刘铉东
张颖超
栾学斌
徐润
侯朝鹏
夏国富
Liu Xuandong;Zhang Yingchao;Luan Xuebin;Xu Run;Hou Chaopeng;Xia Guofu(SINOPEC Research Institute of Petroleum Processing Co.,Ltd.,Beijing 100083;China National Petroleum&Chemical Planning Institute)
出处
《石油炼制与化工》
CAS
CSCD
北大核心
2024年第9期136-143,共8页
Petroleum Processing and Petrochemicals
基金
国家自然科学基金企业创新发展联合基金项目(U20B6002)。
关键词
氢气
甲醇制氢
水蒸气重整
能耗
碳排放强度
hydrogen
methanol to hydrogen
steam reforming
energy consumption
CO_(2)emission intensity
