《PALL 膜反应器》由会员分享，可在线阅读，更多相关《PALL 膜反应器（27页珍藏版）》请在金锄头文库上搜索。
1、Membrane Reactor for Hydrogen ProductionAshok Damle Jim Acquaviva Pall Corporation November 17, 2008This presentation does not contain any proprietary or confidential informationAIChE 2008 Annual Meeting, Philadelphia, PAPhoto courtesy of Pall Corporation2Contributors & Acknowledgments Pall Corporat
2、ion Scott Hopkins Daniel Henkel Rick Kleiner Rajinder P. Singh Hongbin Zhao Keith Rekczis Chuck Love Kevin Stark Colorado School of Mines J. Douglas Way Oyvind Hatlevik RTI International Carrie Richardson DOE (EERE) Sara Dillich3Presentation OutlineDrivers for Hydrogen Production and CO2capture Proc
3、ess intensification / Membrane reactor concept Status of Pd-alloy composite membrane at Pall Inorganic substrate development Composite Pd-alloy membrane development Membrane reactor model simulations WGS Membrane reactor experimental studies Palls capabilities and future activities4Hydrogen Economy
4、and ProductionTwo major drivers for hydrogen production Hydrogen as energy carrier Transportation, Power/heat generation, and Chemical production Pre-combustion CO2capture and hydrogen production has potential to reduce GHG emissionsHydrogen Production Can be produced from multiple pathways natural
5、gas, coal, biomass and renewables Near term hydrogen production from Natural Gas Longer term hydrogen production from Coal and renewable energy sources (biomass, solar, wind)5Conventional Hydrogen ProductionExhaustNatural GasAirSyngas GeneratorWGSPSAHydrogen Product800 oC400 oCWaterResidual GasCurre
6、nt State: 90 % of H2 is produced from NG by this processVery efficient on large scaleFuture State: Combining hydrogen generation and separation (process intensification) can potentially reduce capital and operating cost of hydrogen production at various scales6WGS Membrane Reactor ProcessWGS Membran
7、e Reactor800 oC400 oCHydrogen ProductWaterExhaustNatural GasAir Syngas GeneratorResidual GasIncreased conversion due to equilibrium shift Compact system, smaller footprint Simpler operation and lower operating/energy costs Need compressor for high pressure hydrogen product7Membrane Reformer ProcessN
8、atural GasAirMembrane ReformerHydrogen ProductWaterExhaust CO2600 oCSteamResidual Gas?Compact unit, smaller footprint ? Lower capital cost Milder conditions ?Increased hydrogen yield ? Greater energy efficiency, Less steamLower cost of H2 production ?Need high temperature inorganic membrane for H2se
9、parationEfficiency improvement through process intensification81.Lee, D., Zhang, L., Oyama, S. T., Niu, S., and R. F. Saraf, J. Membr. Sci., 231, 117(2004). 2.Kajiwara, M., Uemiya, S., Kojima, T., and E. Kikuchi, Catal. Today, 56, 65(2000). 3.DeVos, R. M. and H. Verweij, Science, 279, 1710(1998). 4.
10、Hassan, M. H., J. D. Way, P. M. Thoen, and A. C. Dillon, J. Membr. Sci. , 104, 27(1995). 5.Polymer line from : Robeson, L. M., J. Membr. Sci., 62, 165(1991). 6.Wu, J. C. S. et al., J. Membr. Sci., 77, 85(1993). 7.Hatlevik, ., Gade, S. K., Keeling, M. K., Thoen, P. M. and J. D.Way, “Palladium and Pal
11、ladium Alloy Membranes for Hydrogen Separation and Production: History, Fabrication Strategies, and Current Performance,“ submitted to Separation and Purification Technology, Sept. 2008.Why Palladium Membrane ?110100100010410510-910-810-710-610-50.000110-910-810-710-610-50.0001Polymeric Membrane Mat
12、erials Inorganic Membrane MaterialsH2/N2Ideal Separation FactorH 2Permeance (mol/m2.s.Pa)CSM PdAu(1)(2)(3)(4)(6)CSM Pd(7)(7)Graph courtesy of Prof. Doug Way and CSM group9Pd-alloy membrane developmentSelf supporting membrane structuresNeed membrane of sufficient thickness for structural integrity an
13、d strength e.g. tubes or flat sheets 25 mExpensive, Niche applications small H2purifiersComposite membrane structuresThin films on substratesSubstrate provides structural integrity and strength Deposition of thin Pd-alloy films by various techniques 1 5 mBetter seals for High T High P applicationsLo
14、wer cost thin Pd layer, less membrane area10Components of a Composite Membrane3) Pd alloy membrane Functional layer provides for gas separation Critical features: thickness, alloy composition, durability and number of defects1) Porous stainless steel Provides mechanical support that can withstand th
15、e operating conditions of the process Critical features: permeability, weld configuration, mechanical, thermal and chemical compatibility 2) Diffusion barrier Enables formation of functional layer Critical features: surface properties, material, gas permeability, number of defects Pd-alloy membrane
16、development at Pall321Excellent adhesion to zirconia layer, uniform thickness, and surface contour following of Pd-alloy metal film11Ceramic / PSS composite substratefor Pd alloy membranesPSS MediumCeramic CoatingIts all about the substratePorous stainless steel tube with ZrO2ceramic coating: Extensive development work done to optimize
