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One-dimensional molecular sieves for hydrocarbon cold-start emission control: Influence of water and CO2

Paper ID Volume ID Publish Year Pages File Format Full-Text
42086 45910 2010 7 PDF Available
Title
One-dimensional molecular sieves for hydrocarbon cold-start emission control: Influence of water and CO2
Abstract

Using temperature-programmed desorption (TPD) method, we have investigated the performance of one-dimensional molecular sieves to trap hydrocarbons (HCs), e.g., toluene and ethylene, after co-adsorption with 6 vol.% water vapor or 8 vol.% CO2, as well as 14 vol.% combined water–CO2 mixture. The HC trapping capacity of the non-hydrothermally treated samples was reduced by the presence of water, and this effect was much more pronounced for metalloauminophosphate (MeAPO) molecular sieves than Si–Al zeolites. CO2 was found to be a lesser inhibiting species than water in the MeAPO samples. ZSM-12, SAPO-5 and FAPO-36 were found to be hydrothermally stable up to the examined temperature of 800 °C, though with reduction in their trapping efficiency, whereas MAPO-5 sample collapsed under the hydrothermal conditions.

Graphical abstractWe have demonstrated in previous studies that single-file diffusion concept (shown schematically in this figure) is a promising approach to control automotive cold-start emissions. This study was aimed to mimic practical conditions by presenting the influence of water and CO2 on the trapping behavior of selected one-dimensional molecular sieves for cold-start emission control application.Figure optionsDownload full-size imageDownload high-quality image (95 K)Download as PowerPoint slide

Keywords
Automotive cold-start emission control; One-dimensional zeolites; Temperature-programmed desorption; Multi-component mixtures with water and CO2
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One-dimensional molecular sieves for hydrocarbon cold-start emission control: Influence of water and CO2
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volume 382, Issue 2, 15 July 2010, Pages 213–219
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us