Pure H2 production through hollow fiber hydrogen‐selective MFI zeolite membranes using steam as sweep gas
Pure H2 production through hollow fiber hydrogen‐selective MFI zeolite membranes using steam as sweep gas
复制标题
DOI：
10.1002/aic.14924
复制
发表时间：
2015-10
期刊：
影响因子：
3.7
通讯作者：
Yuting Zhang;Qi Sun;X. Gu
中科院分区：
文献类型：
--
作者：
Yuting Zhang;Qi Sun;X. Gu
通过甲基二乙氧基硅烷催化裂化沉积对中空纤维MFI沸石膜进行改性，提高其H2/CO2分离性能，并进一步应用于高温水煤气变换膜反应器。 MR 中使用蒸汽作为吹扫气来生产纯 H2。通过温度、进料压力、吹扫蒸汽流量和蒸汽与 CO 比率的变化对 MR 性能进行了广泛的研究。与传统填充床反应器 (PBR) 相比，由于 H2 去除和吹扫蒸汽反扩散的耦合效应，MR 中的 CO 转化率明显提高。与 PBR 相比，MR 的 CO 转化率在相对较低的温度和蒸汽与 CO 比率下获得了显着增加。在蒸汽吹扫的 MR 中可以实现 98.2% 的高 H2 渗透纯度。此外，无论膜质量如何，MR 都表现出优异的 100 小时长期运行稳定性。 © 2015 美国化学工程师学会 AIChE J, 61: 3459–3469, 2015
Hollow fiber MFI zeolite membranes were modified by catalytic cracking deposition of methyldiethoxysilane to enhance their H2/CO2 separation performance and further used in high temperature water gas shift membrane reactor. Steam was used as the sweep gas in the MR for the production of pure H2. Extensive investigations were conducted on MR performance by variations of temperature, feed pressure, sweep steam flow rate, and steam-to-CO ratio. CO conversion was obviously enhanced in the MR as compared with conventional packed-bed reactor (PBR) due to the coupled effects of H2 removal as well as counter-diffusion of sweep steam. Significant increment in CO conversion for MR vs. PBR was obtained at relatively low temperature and steam-to-CO ratio. A high H2 permeate purity of 98.2% could be achieved in the MR swept by steam. Moreover, the MR exhibited an excellent long-term operating stability for 100 h in despite of the membrane quality. © 2015 American Institute of Chemical Engineers AIChE J, 61: 3459–3469, 2015