scholarly journals Cage-Defining Ring: A Molecular Sieve Structural Indicator for Light Olefin Product Distribution from the Methanol-to-Olefins Reaction

ACS Catalysis ◽  
2019 ◽  
Vol 9 (7) ◽  
pp. 6012-6019 ◽  
Author(s):  
Jong Hun Kang ◽  
Faisal H. Alshafei ◽  
Stacey I. Zones ◽  
Mark E. Davis
Keyword(s):  
Molecular Sieve ◽  
Product Distribution ◽  
Light Olefin ◽  
Structural Indicator

scholarly journals Study on the hydrothermal liquefaction of antibiotic residues with molecular sieve catalysts in the ethanol–water system: focus on product distribution and characterization

RSC Advances ◽  
2021 ◽  
Vol 11 (43) ◽  
pp. 26763-26772
Author(s):  
Jian Yang ◽  
Chen Hong ◽  
Yi Xing ◽  
Zixuan Zheng ◽  
Zaixing Li ◽  
...  
Keyword(s):  
Molecular Sieve ◽  
Water System ◽  
Product Distribution ◽  
Hydrothermal Liquefaction ◽  
Raw Material ◽  
Antibiotic Residues ◽  
Bio Oil ◽  
Antibiotic Residue ◽  
System Focus

In this study, the antibiotic residue was used as a raw material to catalyze hydrothermal liquefaction (HTL) in an ethanol–water system to prepare bio-oil.

Pyrolysis of polypropylene over a LZ-Y52 molecular sieve: kinetics and the product distribution

2019 ◽  
Vol 28 (10) ◽  
pp. 839-847 ◽  
Author(s):  
Muhammad Anas Khan ◽  
Jan Nisar ◽  
Munawar Iqbal ◽  
Afzal Shah ◽  
Rafaqat Ali Khan ◽  
...  
Keyword(s):  
Molecular Sieve ◽  
Product Distribution

Bifunctional Pt-Molecular Sieve Catalysts for Hydroisomerization of Long-Chain Olefins

2011 ◽  
Vol 418-420 ◽  
pp. 2250-2254
Author(s):  
Fei Ding ◽  
Cai Rong Luo ◽  
Hai Rong Zhang ◽  
Lian Xiong ◽  
Xin De Chen
Keyword(s):  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Molecular Sieves ◽  
Molecular Sieve ◽  
Textural Properties ◽  
Product Distribution ◽  
Bifunctional Catalysts ◽  
Long Chain ◽  
Scanning Electron

Bifunctional Pt/HZSM-5, Pt/HBeta, Pt/HMCM-41 and Pt/HSAPO-11 catalysts were prepared using pseudoboehmite as a binder. The H2-TPR profiles, scanning electron microscope (SEM) and brunauer-emmett-teller (BET) pointed out that reducibility of catalysts and textural properties. These bifunctional catalysts have been tested in long-chain olefins hydroisomerization. The experiments were carried out at 320oC under 2.0 MPa of hydrogen and at 3.0 h-1WHSV. Complete hydrogenation of long-chain olefins was observed over Pt/HMCM-41 and Pt/HSAPO-11. Hydroisomerization reactions also occured in the case of Pt supported strong acidic molecular sieves (HZSM-5 and HBeta). The result suggests product distribution of long-chain olefins hydroisomerization is dependent on the balance between the acid and metallic functions in catalysts.

Study of coke deposition phenomena on the SAPO_34 catalyst and its effects on light olefin selectivity during the methanol to olefin reaction

RSC Advances ◽  
2015 ◽  
Vol 5 (100) ◽  
pp. 81965-81980 ◽  
Author(s):  
Reza Bagherian Rostami ◽  
Mohammad Ghavipour ◽  
Zuoxing Di ◽  
Yao Wang ◽  
Reza Mosayyebi Behbahani
Keyword(s):  
Hydrogen Transfer ◽  
Catalyst Deactivation ◽  
Coke Formation ◽  
Great Influence ◽  
Product Distribution ◽  
Coke Deposition ◽  
Light Olefin ◽  
Methanol To Olefin ◽  
Olefin Selectivity ◽  
Transfer Index

Hydrogen transfer index was found to be a key parameter in prediction of coke deposition behavior. A good macro-model of product distribution with coke formation is provided. Temperature had a great influence on distribution of coke species and catalyst deactivation.

scholarly journals Correction to: Pyrolysis of polypropylene over a LZ-Y52 molecular sieve: kinetics and the product distribution

2020 ◽  
Vol 29 (4) ◽  
pp. 369-369
Author(s):  
Muhammad Anas Khan ◽  
Jan Nisar ◽  
Munawar Iqbal ◽  
Afzal Shah ◽  
Rafaqat Ali Khan ◽  
...  
Keyword(s):  
Molecular Sieve ◽  
Product Distribution

Polymorphic phase transition of a membrane protein - analysis of continuous diffuse electron diffraction intensity

1986 ◽  
Vol 44 ◽  
pp. 166-167
Author(s):  
Douglas L. Dorset ◽  
Andrew K. Massalski
Keyword(s):  
Molecular Sieve ◽  
Three Dimensional ◽  
Pore Geometry ◽  
Two Dimensional ◽  
Diffraction Intensity ◽  
Polymorphic Phase Transition ◽  
E Coli ◽  
Crystallographic Study ◽  
Hexagonal Form ◽  
Polymorphic Forms

Matrix porin, the ompF gene product of E. coli, has been the object of a electron crystallographic study of its pore geometry in an attempt to understand its function as a membrane molecular sieve. Three polymorphic forms have been found for two-dimensional crystals reconstituted in phospholipid, two hexagonal forms with different lipid content and an orthorhombic form coexisting with and similar to the hexagonal form found after lipid loss. In projection these have been shown to retain the same three-fold pore triplet geometry and analyses of three-dimensional data reveal that the small hexagonal and orthorhombic polymorphs have similar structure as well as unit cell spacings.

Fibrillin molecules aggregate to form an extendible beaded structure which is a major component of “Elastin Associated” microfibrils

1989 ◽  
Vol 47 ◽  
pp. 246-247
Author(s):  
Douglas R. Keene ◽  
B. Kerry Maddox ◽  
Marie B. Spurgin ◽  
Lynn Y. Sakai ◽  
Robert W. Glanville
Keyword(s):  
Molecular Sieve ◽  
Room Temperature ◽  
Culture Medium ◽  
Weight Fraction ◽  
Ammonium Bicarbonate ◽  
High Molecular Weight Fraction ◽  
Bicarbonate Buffer ◽  
Human Amnion ◽  
Gold Conjugate ◽  
Ammonium Bicarbonate Buffer

A mouse monoclonal antibody was used to identify beaded aggregates found in guanidine extracts of human amnion as assemblies of fibrillin molecules. These aggregates were also shown to be a major component of extracellular matrix microfibrils. We further demonstrated that the periodicity of these aggregates can be increased when subjected to mechanical stress.Human amnion was extracted with guanidine and the extracted material purified using ion exchange and molecular sieve chromatography. A high molecular weight fraction was precipitated by dialyzing against dilute acetic acid. Part of the precipitate was suspended in 0.2 M ammonium bicarbonate buffer and rotary shadowed. A second portion was resuspended in culture medium containing antibody which recognizes matrix microfibrils, diluted 1:5 in ammonium bicarbonate and reacted for 120 minutes at room temperature. Antibody labeled precipitate was washed by repeated pelleting and resuspension in buffer and then incubated in Janssen GAM 5 nm gold conjugate for 60 minutes at room temperature.

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