Introduction of π-Complexation into Porous Aromatic Framework for Highly Selective Adsorption of Ethylene over Ethane (Cited by: 15)

CATEGORY: π-COMPLEXATION 
Introduction of π-Complexation into Porous Aromatic Framework for Highly Selective Adsorption of Ethylene over Ethane (Cited by: 15)

Type	Journal Article
Author	Baiyan Li
Author	Yiming Zhang
URL	http://dx.doi.org/10.1021/ja502119z
Volume	136
Issue	24
Pages	8654-8660
Publication	Journal of the American Chemical Society
Date	June 18, 2014
Abstract	Reports the introduction of π-complexation into a porous aromatic framework (PAF), affording significant increase in ethylene uptake capacity, as illustrated in the context of Ag(I) ion functionalized PAF-1, PAF-1-SO3Ag. IAST calculations using single-component-isotherm data and an equimolar ethylene/ethane ratio at 296 K reveal that PAF-1-SO3Ag revealed exceptionally high ethylene/ethane adsorption selectivity, far surpassing benchmark zeolite and any other MOF reported in literature. Researchers demonstrated the formation of π-complexation between ethylene molecules and Ag(I) ions in PAF-1-SO3Ag by the high isosteric heats of adsorption of C2H4, as well as by in situ IR spectroscopy studies. Transient breakthrough experiments, supported by simulations, showed the feasibility of PAF-1-SO3Ag for producing 99.95%+ pure C2H4 in a Pressure Swing Adsorption operation. Their results suggest a new perspective to functionalizing PAFs and other types of advanced porous materials for highly selective adsorption of ethylene over ethane.

Advancements in the Detection and Sizing of “Pinhole” Metal Loss

CATEGORY: PIPELINE INTEGRITY 
Advancements in the Detection and Sizing of “Pinhole” Metal Loss

Type	Conference Paper
Author	Wilson Santamaria
Author	London, UK ExxonMobil
URL	http://proceedings.asmedigitalcollection.asme.org/proceeding.aspx?articleid=2022652
Volume	Volume 2: Pipeline Integrity Management
Place	Calgary, Alberta, Canada
Date	September 29–October 3, 2014
Conference Name	2014 10th International Pipeline Conference
Abstract	At IPC 2010 PII Pipeline Solutions (PII) presented the paper “Validation Of Latest Generation Mfl In-Line Inspection Technology Leads To Improved Detection And Sizing Specification For Pinholes, Pitting, Axial Grooving And Axial Slotting”1, IPC 2010-31124. The suggestion was that this improvement would allow operators to make more informed pipeline integrity decisions in future. In the 4 years since this paper was presented many hundreds of runs have been completed with this latest generation MFL ILI technology, capturing information on tens of thousands of kilometers of pipe, and generating a significant volume of dig verification data. In collaboration with Oil & Gas pipeline operators around the world this growing dig verification database has been utilized to improve software models, algorithms, & analysis processes to validate and further enhance system detection, sizing, & reporting capabilities. This paper focuses on the recent collaboration between ExxonMobil and PII, to investigate system capabilities with respect to “Pinholes”, to address a known threat to a specific pipeline in the United Kingdom. This paper will describe the: • Evolution of the “Pinhole” specification that captured the interest of ExxonMobil. • Use of Finite Element models to predict entitlement for characterization of “Pinhole” type defects • Detail of and results from the ExxonMobil sponsored test program that was conducted in early 2013 • The in-line inspection, analysis report, and dig verification that followed for the pipeline in question. This joint paper, prepared and presented in collaboration by ExxonMobil & PII, will reflect the perspective and synergy of the Pipeline Owner/Operator and the ILI Vendor.

The beneficial use of ultrasound in synthesis of nanostructured Ce-doped SAPO-34 used in methanol conversion to light olefins

CATEGORY: OLEFINS 
The beneficial use of ultrasound in synthesis of nanostructured Ce-doped SAPO-34 used in methanol conversion to light olefins

Type	Journal Article
Author	Mojtaba Charghand
Author	Mohammad Haghighi
URL	http://www.sciencedirect.com/science/article/pii/S1350417714001011
Volume	21
Issue	5
Pages	1827-1838
Publication	Ultrasonics Sonochemistry
Date	September 2014
Abstract	Methanol to olefins process is a promising route for synthesis of light olefins over nanostructured catalysts. Authors describe catalyst development by sonochemical method for methanol to olefins reaction, with the goal of reaching the most efficient catalyst. Researchers fabricated the CeSAPO-34 catalyst using the ultrasound assisted hydrothermal method, and characterized them with XRD, FESEM, PSD, EDX, BET and FTIR techniques. They compared the characteristics and performance of this sample to the catalyst prepared by conventional hydrothermal method. XRD patterns reflected the higher crystallinity of the catalyst synthesized by ultrasound application. In comparison, particles with smaller sizes obtained by applying ultrasonic irradiation. The catalyst obtained using ultrasound had the longer lifetime and sustained desired light olefins at higher values.