Novel Micro- and Mesoporous Composite Molecular Sieve Assembled by Zeolite L Nanocrystal and Its Performance for the Hydrodesulfurization (HDS) of Fluid Catalytic Cracking (FCC) Gasoline†

2010 ◽  
Vol 24 (7) ◽  
pp. 3764-3771 ◽  
Author(s):  
Quan Huo ◽  
Yanjun Gong ◽  
Tao Dou ◽  
Zhen Zhao ◽  
Huifang Pan ◽  
...  
Keyword(s):  
Catalytic Cracking ◽  
Molecular Sieve ◽  
Fluid Catalytic Cracking ◽  
Mesoporous Composite ◽  
Fcc Gasoline ◽  
Zeolite L ◽  
Composite Molecular Sieve

Progress in Synthesis of Micro- and Mesoporous Composite Molecular Sieve

2011 ◽  
Vol 396-398 ◽  
pp. 1151-1156
Author(s):  
Wen Yuan Wu ◽  
Chun Wei Shi ◽  
Xue Bian
Keyword(s):  
Hydrothermal Synthesis ◽  
Microwave Radiation ◽  
Vapor Phase ◽  
Molecular Sieves ◽  
Molecular Sieve ◽  
Vapor Phase Transport ◽  
Mesoporous Composite ◽  
Composite Molecular Sieve ◽  
Potential Applications ◽  
Phase Transport

Micro- and mesoporous composite molecular sieves enable to achieve grades distribution of pore sizes and appropriate collocation of acidity,which have potential applications in catalysis and adsorption of large molecules.This review focus on some of the most recent results during the last decades.The techniques applied to synthesize different micro-mesoporous composite molecular sieves includes single template, dual template, crystallization of mesoporous walls, alkaline desilication, vapor-phase transport synthesis,and microwave radiation hydrothermal synthesis.

scholarly journals Industrial application of gasoline aromatization and desulfurization technology in Hohhot refinery

2017 ◽  
Vol 23 (3) ◽  
pp. 391-398
Author(s):  
Zixia Li ◽  
Yin Ran ◽  
Wenqi Zhang ◽  
Wei Sun ◽  
Tinghai Wang
Keyword(s):  
Industrial Application ◽  
Catalytic Cracking ◽  
Sulfur Removal ◽  
Economic Benefits ◽  
Fluid Catalytic Cracking ◽  
Operation Condition ◽  
High Quality ◽  
Great Flexibility ◽  
Research Octane Number ◽  
Fcc Gasoline

Gasoline aromatization and desulfurization (GARDES) technology is extensively used in refineries of Petrochina, aiming to produce high quality ultraclean fluid catalytic cracking (FCC) gasoline. This article introduces the industrial application results on the hydrodesulfurization unit of the Hohhot refinery, which plays an important role in guiding next round gasoline upgrading. The characteristics and the principle of GARDES technology were elaborated by analyzing the distribution of sulfur and hydrocarbon compounds in the feed and product. The analysis results proved that the presence of broad ranged sulfur types in the feed can be removed at different stages. Olefin can be decreased by saturation and conversion into i-paraffins and aromatics. The sulfur content of the blend product can be limited under 10 mg/kg, showing GARDES technology has excellent sulfur removal ability. The olefin reduction can also satisfy the ever-increasing severe requirement about the olefin limitation, while the loss of research octane number (RON) can be minimized to an acceptable level. Furthermore, according to the demand of gasoline upgrading, GARDES technology has great flexibility by adjusting operation condition without any further investment, which brings more economic benefits for refinery.

Synthesis and Performance of NaA/MCM-48 Micro-Mesoporous Composite Molecular Sieve

2012 ◽  
Vol 476-478 ◽  
pp. 1979-1986
Author(s):  
Jian Min Pan ◽  
Yue Cheng ◽  
Yun Yang Wei
Keyword(s):  
Waste Water ◽  
Molecular Sieve ◽  
Synthesis Method ◽  
Mesoporous Molecular Sieve ◽  
Optimal Conditions ◽  
Mesoporous Composite ◽  
Equivalent Ratio ◽  
Composite Molecular Sieve ◽  
And Performance ◽  
Decoloration Rate

NaA / MCM-48 micro-mesoporous molecular sieve was prepared at 100°C for 72 h by hydrothermal synthesis method, where chemicals with a equivalent ratio of n (SiO2)∶n (CTAB)∶n (H2O)∶n ( NaOH) is 1∶0.45∶60∶0.48 were added to NaA microporous molecular sieve prepared hydrothermally at 100°C for 5 h from a composite solution with a equivalent ratio of Na2O∶SiO2∶Al2O3∶H2O is 3∶2∶1∶200. The adsorption of the NaA / MCM-48 micro-mesoporous molecular sieve to cationic red X-5GN simulated dye existing in the waste water showed that, in 50 mL of 20 mg/L cationic red X-5GN solution, under the optimal conditions of a dosage of NaA/MCM-48 micro-mesoporous composite molecular sieve of 1.8g/L, a pH of 7 and an oscillation time of 30min, the decoloration rate of spent solution was above 82.5%. The XRD, SEM and TEM processes were adopted for its characterization to display the possible reasons.

Catalytic fast co-pyrolysis of waste greenhouse plastic films and rice husk using hierarchical micro-mesoporous composite molecular sieve

2020 ◽  
Vol 102 ◽  
pp. 561-568 ◽  
Author(s):  
Zhaoying Li ◽  
Zhaoping Zhong ◽  
Bo Zhang ◽  
Wei Wang ◽  
Gabriel V.S. Seufitelli ◽  
...  
Keyword(s):  
Rice Husk ◽  
Molecular Sieve ◽  
Mesoporous Composite ◽  
Plastic Films ◽  
Composite Molecular Sieve

scholarly journals Pervaporative desulfurization of gasoline – separation of thiophene/n-heptane mixture / Perwaporacyjne odsiarczanie benzyny – separacja mieszanin tiofen/n-heptan

2015 ◽  
Vol 41 (2) ◽  
pp. 3-11 ◽  
Author(s):  
Katarzyna Rychlewska ◽  
Krystyna Konieczny ◽  
Michał Bodzek
Keyword(s):  
Active Layer ◽  
Catalytic Cracking ◽  
Separation Efficiency ◽  
Fluid Catalytic Cracking ◽  
Feed Flow Rate ◽  
Fcc Gasoline ◽  
Membrane Performance ◽  
Organic Sulphur Compound ◽  
Feed Temperature ◽  
Selection Of

Abstract This paper presents the recent advances in pervaporative reduction of sulfur content in gasoline. Methods of preliminary selection of membrane active layer material are presented. Interactions between gasoline components (typical hydrocarbon and sulfur species) and membranes are showed. Influence of pervaporation process parameters i.e. feed temperature, downstream pressure and feed flow rate on the separation efficiency is discussed. Investigations of the influence of sulfur concentration in fluid catalytic cracking (FCC) gasoline on membrane performance have been conducted. A series of PV tests was carried out to investigate the separation properties of the commercial composite membrane with an active layer made of poly(dimethylsiloxane) and to determine the efficiency of organic sulphur compound (thiophene) removal from model thiophene/n-heptane mixture depending on its concentration.

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