关键词:

化学链燃烧, 焦炉煤气, 直接制氢, CO₂捕集, Aspen Plus

Abstract:

Based on chemical looping combustion, a system for hydrogen production from sorption-enhanced coke-oven gas steam reforming is presented.The system includes three reactors, namely sorption-enhanced coke-oven gas steam reforming reactor (SECOGSR), fuel reactor and air reactor.The system realizes direct production of high-purity hydrogen (93.23%) with inherent CO₂ capture.Aspen Plus was used to simulate the sorption-enhanced coke-oven gas steam reforming process and the whole system.The optimized operating conditions, such as temperature, pressure, calcium to carbon ratio, and steam to carbon ratio of the SECOGSR were 650℃, 1.5 MPa, 1 and 4, respectively.In order to achieve the heat balance of the whole system with no additional heat supply, 1 mol input of coke-oven gas of SECOGSR consumed 0.139 mol coke-oven gas, 0.648 mol air in the fuel reactor and 3.11 mol oxygen carrier in the air reactor, which was composed of NiO, Y₂O₃ and ZrO₂ with the ratio of 0.73/0.022/0.248 (mol).1 mol coke-oven gas generates 1.30 mol hydrogen and 0.355 mol pure CO₂ without additional separation process in the system.

Key words:

化学链燃烧, 焦炉煤气, 直接制氢, CO₂捕集, Aspen Plus