Effect of sulfur on the catalytic performance of Fe–Ni/Al2O3 catalysts for light olefins production

CATEGORY: OLEFINS 
Effect of sulfur on the catalytic performance of Fe–Ni/Al2O3 catalysts for light olefins production

Type	Journal Article
Author	Mostafa Feyzi
Author	Mohammad Mehdi Khodaei
URL	http://www.sciencedirect.com/science/article/pii/S1876107013001387
Volume	45
Issue	2
Pages	452-460
Publication	Journal of the Taiwan Institute of Chemical Engineers
Date	March 2014
Abstract	Presents results of a study of the effects of sulfur (S) on the catalytic behavior of alumina supported iron–nickel catalysts for the conversion of synthesis gas to light olefins. Catalytic evaluation results revealed that the CO conversion, CH4 and light olefins selectivity were affected by level of sulfur in the composition of catalyst. Researchers examined the catalytic performance of modified catalysts with sulfur in varying operational conditions, including H2/CO molar feed ratios, gas hourly space velocity (GHSV), reaction temperature and reaction total pressure. Results revealed that the best operational conditions for Fe–Ni/Al2O3 catalyst promoted with 0.15 wt% of K2S are 340 °C, GHSV = 3000 h−1, H2/CO molar ratio 2/1 under atmospheric pressure.

Catalytic conversion of syngas to olefins over Mn–Fe catalysts

CATEGORY: OLEFINS 
Catalytic conversion of syngas to olefins over Mn–Fe catalysts

Type	Journal Article
Author	Saleh A. Al-Sayari
Author	Najran University, Saudi Arabia Advanced Materials and NanoResearch Center
URL	http://www.sciencedirect.com/science/article/pii/S0272884213007360
Volume	40
Issue	1, Part A
Pages	723-728
Publication	Ceramics International
Date	January 2014
Abstract	Researchers synthesized a series of MnO2–Fe2O3 with various contents of Mn using the co-precipitation method. XRD patterns revealed that the sharp and intense peaks are related to the superior crystal quality of α-Fe2O3 nanostructures. HR-TEM images showed that α-Fe2O3 and MnO2, were partly in close contact and the lattice fringes exhibited the typical distances, i.e., α-Fe2O3 (104) (2.7 Å) and MnO2 (310) (3.1 Å). X-ray photoelectron spectroscopy (XPS) results of the Fe 2p core-level binding energy spectrum of the α-Fe2O3 and Mn 2p, indicated the presence of Fe3+ and Mn4+. The direct synthesis of olefins from syngas was conducted over the MnO2–Fe2O3 catalysts under pressurized fixed-bed continuous flow conditions. The results demonstrated that Mn–Fe catalyst had high catalytic activity and high olefins selectivity without the addition of any promoters at low pressure. Researchers observed that the catalyst containing 20 at% Mn–Fe was an optimal catalyst for the conversion of synthesis gas to hydrocarbons especially light olefins.

Development of a New Kinetic Model for Methanol to Propylene Process on Mn/H-ZSM-5 Catalyst

CATEGORY: METHANOL-TO-PROPYLENE 
Development of a New Kinetic Model for Methanol to Propylene Process on Mn/H-ZSM-5 Catalyst

Type	Journal Article
Author	N. Hadi
Author	A. Niaei
URL	Free Full Text Source:  http://hrcak.srce.hr/117986
Volume	28
Issue	1
Pages	53-63
Publication	Chemical and Biochemical Engineering Quarterly
Date	2014/03/21
Abstract	The activity of the H-ZSM-5 was modified by the addition of Ca, Mn, Cr, Fe, Ni, Ag, Ce and P. The highest selectivity of propylene was obtained over the Mn/H-ZSM-5 catalyst. The Mn modified catalyst was selected as the optimal catalyst...