Catalytic ethylene production from ethanol dehydration over non-modified and phosphoric acid modified Zeolite H-Y (80) catalysts

2017 ◽  
Vol 158 ◽  
pp. 85-95 ◽  
Author(s):  
Jiah Chee Soh ◽  
Soo Ling Chong ◽  
Sk Safdar Hossain ◽  
Chin Kui Cheng
Keyword(s):  
Phosphoric Acid ◽  
Ethylene Production ◽  
Ethanol Dehydration ◽  
Modified Zeolite

Ethylene production via ethanol dehydration over desilicated ZSM-5 catalyst

2021 ◽  
Vol 10 (4) ◽  
pp. 75-79
Author(s):  
Loc Bui Tan ◽  
Tu Le Nguyen Quang ◽  
Long Nguyen Quang
Keyword(s):  
Ethylene Production ◽  
Fossil Fuels ◽  
Opposite Effect ◽  
External Surface ◽  
Space Velocity ◽  
Ethanol Conversion ◽  
Ethanol Dehydration ◽  
Modified Zeolite ◽  
Potential Alternative ◽  
Lower Temperature

The catalytic dehydration of ethanol is a potential alternative route to synthesize ethylene apart from the traditional method which depends on fossil fuels. This report successfully prepared modified ZSM-5 with mesopores using desilication methods to enhance ethanol catalytic dehydration performance and ethylene production at lower temperature. The modified zeolite have the external surface area increased by 3.5 times and a higher dehydration efficiency compared with the original sample especially at temperatures below 220°C. Increasing reaction temperatures and gas houly space velocity (GHSV) increased the dehydration efficiency while increasing the inlet ethanol concentration had opposite effect. Significantly, the ethanol conversion over modified zeolite remained above 90 % when the GHSV increased to 36000 h‑1 after the time-on-stream of 24 h.

Ethylene production via catalytic ethanol dehydration by 12-tungstophosphoric acid@ceria-zirconia

Fuel ◽  
2019 ◽  
Vol 239 ◽  
pp. 491-501 ◽  
Author(s):  
Maria Clara H. Clemente ◽  
Gesley Alex V. Martins ◽  
Elon F. de Freitas ◽  
José A. Dias ◽  
Sílvia C.L. Dias
Keyword(s):  
Ethylene Production ◽  
Tungstophosphoric Acid ◽  
Ethanol Dehydration

The Esterification of Free Fatty Acids in Karanja (Pongamia Pinnata) Oil Using Phosphoric Acid Modified Zeolite

2012 ◽  
Vol 34 (23) ◽  
pp. 2234-2241 ◽  
Author(s):  
K. V. Thiruvengadaravi ◽  
J. Nandagopal ◽  
P. Baskaralingam ◽  
V. Sathya Selva Bala ◽  
P. Vijayalakshmi ◽  
...  
Keyword(s):  
Fatty Acids ◽  
Phosphoric Acid ◽  
Free Fatty Acids ◽  
Pongamia Pinnata ◽  
Modified Zeolite

scholarly journals Removal of Nickel(II) from Aqueous Solutions by Adsorption with Modified ZSM- 5 Zeolites

2009 ◽  
Vol 6 (3) ◽  
pp. 729-736 ◽  
Author(s):  
P. Panneerselvam ◽  
V. Sathya Selva Bala ◽  
N. Thinakaran ◽  
P. Baskaralingam ◽  
M. Palanichamy ◽  
...  
Keyword(s):  
Phosphoric Acid ◽  
Aqueous Solutions ◽  
Solute Concentration ◽  
Y Zeolite ◽  
Nickel Ion ◽  
Freundlich Model ◽  
Modified Zeolite ◽  
Equilibrium Modeling ◽  
Different Temperatures ◽  
Modeling Data

The sorptive removal of nickel ion from aqueous solutions using modified ZSM-5 zeolites was investigated. Experiments were carried out as a function of solute concentration and different temperatures. Mesoporous material of ZSM-5 zeolite was modified with phosphoric acid by wet method. The modified zeolite was converted to Na+form using aqueous NaHCO3solution. The Na+form of modified zeolite, represented as PNa2--ZSM-5 was characterized by XRD, BET, SEM and AAS techniques. It was then tested for ion exchange with aqueous Ni(SO4) solution. The Ni2+content of the solution was analyzed by AAS. Phosphoric acid modified PNa2--ZSM-5 zeolite shows higher adsorption capacity than the parent Na-Y zeolite. Equilibrium modeling data were fit to linear Langmuir model then the Freundlich model. These parameter confirmed that sorption of Ni2+is feasible spontaneous and endothermic.

scholarly journals Relationship of Ethylene Production to Stress Alleviation in Seeds of Lettuce Cultivars

1990 ◽  
Vol 115 (2) ◽  
pp. 294-298 ◽  
Author(s):  
Janusz Prusinski ◽  
Anwar A. Khan
Keyword(s):  
Polyethylene Glycol ◽  
Carboxylic Acid ◽  
Phosphoric Acid ◽  
Seed Coat ◽  
Ethylene Production ◽  
Stress Alleviation ◽  
Germination Potential ◽  
High Germination ◽  
Relationship Of

Seeds (intact or slit) of lettuce (Luctuca sativa L.) cultivars with greater ability to produce ethylene germinated better under stressful conditions. Highly significant correlations were found between ethylene production and germination in 0.1 m NaCI (- 0.49 MPa) solution at 25C (r = 0.95, intact seeds), in - 0.3 MPa PEG solution (r = 0.86, intact seeds; r = 0.81, slit seeds), and in water at 32C (r = 0.80, slit seeds) or 35C (r = 0.80, slit seeds). Slitting the seed coat increased the ethylene production and improved germination during osmotic restraint in most cultivars, particularly in `Mesa 659' and `Super 59'. The differing ability of cultivars to produce ethylene during stress generally corresponded with their ability to generate germination potential. Ethylene production and germination potential in untreated and ACC-treated `Mesa 659' seeds increased upon slitting under stressful conditions. Thus, the ability of seeds to produce ethylene and to generate high germination potential under stressful conditions may be used as criteria to select stress-tolerant lettuce cultivars. Chemical names used: polyethylene glycol 8000 (PEG), 1-aminocyclopropane-1-carboxylic acid (ACC), (2-chlorethyl) phosphoric acid (ethephon).

Ethylene production from ethanol dehydration over mesoporous SBA-15 catalyst derived from palm oil clinker waste

2020 ◽  
Vol 249 ◽  
pp. 119323 ◽  
Author(s):  
Yoke Wang Cheng ◽  
Chi Cheng Chong ◽  
Chin Kui Cheng ◽  
Kim Hoong Ng ◽  
Thongthai Witoon ◽  
...  
Keyword(s):  
Palm Oil ◽  
Ethylene Production ◽  
Ethanol Dehydration

Solar-driven plasmonic tungsten oxides as catalyst enhancing ethanol dehydration for highly selective ethylene production

2020 ◽  
Vol 264 ◽  
pp. 118517 ◽  
Author(s):  
Juan Li ◽  
Guanying Chen ◽  
Jiahao Yan ◽  
Baibiao Huang ◽  
Hefeng Cheng ◽  
...  
Keyword(s):  
Ethylene Production ◽  
Ethanol Dehydration ◽  
Tungsten Oxides
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