Catalytic upgrading of sugarcane bagasse pyrolysis oil

2014 ◽  
pp. 677-682
Author(s):  
Kerina Pather ◽  
Thabo Magubane ◽  
David Lokhat
Keyword(s):  
Sugarcane Bagasse ◽  
Liquid Product ◽  
Process Conditions ◽  
Pyrolysis Oil ◽  
Heating Rates ◽  
Catalytic Upgrading ◽  
Product Yields ◽  
Biomass Particle Size ◽  
Lower Heating ◽  
Reactor Heating

Close-coupled pyrolysis and catalytic upgrading of sugarcane bagasse was carried out in a laboratory-scale apparatus under different process conditions to determine the effect of pyrolysis reactor heating rate, upgrading temperature and biomass particle size on the yield of liquid organic products. Heating rates of 40–60°C·min–1, upgrading temperatures of 385–500°C and 300–1500µm particles were used. A conventional and gallium-doped HZSM-5 catalyst was employed. Liquid product yields were in the range of 10–25%. Lower heating rates and upgrading temperatures as well as larger particle sizes gave the best liquid organic product yields. The addition of gallium to the catalyst resulted in an improved yield of benzene. The deoxygenation activity with respect to phenolic compounds remained relatively unchanged.

Catalytic upgrading of sugarcane bagasse pyrolysis vapours over rare earth metal (Ce) loaded HZSM-5: Effect of catalyst to biomass ratio on the organic compounds in pyrolysis oil

2018 ◽  
Vol 220 ◽  
pp. 787-799 ◽  
Author(s):  
Vekes Balasundram ◽  
Norazana Ibrahim ◽  
Rafiziana Md. Kasmani ◽  
Ruzinah Isha ◽  
Mohd. Kamaruddin Abd. Hamid ◽  
...  
Keyword(s):  
Rare Earth ◽  
Organic Compounds ◽  
Sugarcane Bagasse ◽  
Rare Earth Metal ◽  
Earth Metal ◽  
Pyrolysis Oil ◽  
Catalytic Upgrading ◽  
Biomass Ratio

Co-pyrolysis of sugarcane bagasse with petroleum residue. Part II. Product yields and properties

Fuel ◽  
2002 ◽  
Vol 81 (7) ◽  
pp. 893-907 ◽  
Author(s):  
Manuel Garcı̀a-Pèrez ◽  
Abdelkader Chaala ◽  
Christian Roy
Keyword(s):  
Sugarcane Bagasse ◽  
Petroleum Residue ◽  
Product Yields

FOAM TEMPERATURES DURING VAT PASTEURIZATION OF MILK PRODUCTS

1971 ◽  
Vol 34 (3) ◽  
pp. 133-139
Author(s):  
R. W. Dickerson ◽  
R. B. Read
Keyword(s):  
Milk Fat ◽  
Liquid Surface ◽  
Liquid Product ◽  
Ice Cream ◽  
Microbial Pathogens ◽  
Slow Heating ◽  
Milk Product ◽  
Heating Rates ◽  
Holding Period ◽  
Foam Thickness

Heating rates of foam during vat pasteurization were investigated to determine whether shorter holding times and higher processing temperatures would be feasible from a public health standpoint. A rake of 19 thermocouples, spaced 0.5 inch apart, was installed vertically in a 300-gal vat pasteurizer and the rake was adjusted to measure the temperature of the heated airspace, foam, and liquid product. With 200 gal of ice cream mix (16% milk fat), an 11-inch foam was generated on the liquid surface. The minimum temperature in the ice cream mix foam was below pasteurization temperature for 27 min of the 30-min holding period despite satisfactory temperatures as indicated by the product and airspace thermometers. When a 7-inch foam was generated above 218 gal of chocolate milk, the minimum foam temperature was below pasteurization temperature for the first 14 min of the holding period. Attempts to generate foams on milk were unsuccessful. Because of the slow heating rates of milk-product foams, holding times shorter than 30 min cannot ensure the inactivation of microbial pathogens in the foam, and, consequently, they are not recommended. Some foams should be held longer than 30 min to ensure pasteurization, and additional holding time needed may be computed from known values of foam thickness, airspace temperature , and heating rate of the liquid.

scholarly journals Oxidative Desulfurization of Tire Pyrolysis Oil over Molybdenum Heteropolyacid Loaded Mesoporous Catalysts

Reactions ◽  
2021 ◽  
Vol 2 (4) ◽  
pp. 457-472
Author(s):  
Jasmine Kaur ◽  
Sundaramurthy Vedachalam ◽  
Philip Boahene ◽  
Ajay K. Dalai
Keyword(s):  
Sulfur Content ◽  
Photoelectron Spectroscopy ◽  
Supported Catalysts ◽  
Surface Acidity ◽  
Oxidative Desulfurization ◽  
Acid Catalyst ◽  
Acid Sites ◽  
Process Conditions ◽  
Pyrolysis Oil ◽  
X Ray

Pyrolysis oil derived from waste tires consists of sulfur content in the range of 7000 to 9000 ppm. For use in diesel engines, its sulfur content must be lowered to 10 to 15 ppm. Though conventional hydrodesulfurization is suitable for the removal of sulfur from tire pyrolysis oil, its high cost provides an avenue for alternative desulfurization technologies to be explored. In this study, oxidative desulfurization (ODS), a low-cost technology, was explored for the desulfurization of tire pyrolysis oil. Two categories of titanium-incorporated mesoporous supports with 20 wt% loaded heteropoly molybdic acid catalyst (HPMo/Ti-Al2O3 and HPMo/Ti-TUD-1) were developed and tested for ODS of tire pyrolysis oil at mild process conditions. Catalysts were characterized by X-ray diffraction, BET-N2 physisorption, and X-ray photoelectron spectroscopy (XPS). The incorporation of Ti into Al2O3 and TUD-1 frameworks was confirmed by XPS. The surface acidity of catalysts was studied by the temperature-programmed desorption of NH3 and pyridine FTIR analyses. HPMo/Ti-Al2O3 and HPMo/Ti-TUD-1 catalysts contained both Lewis and Brønsted acid sites. The presence of titanium in catalysts was found to promote the ODS activity of phosphomolybdic acid. The Ti-TUD-1-supported catalysts performed better than the Ti-Al2O3-supported catalysts for the ODS of tire pyrolysis oil. Hydrogen peroxide and cumene peroxide were found to be better oxidants than tert-butyl hydroperoxide for oxidizing sulfur compounds of tire pyrolysis oil. Process parameter optimization by the design of experiments was conducted with an optimal catalyst along with the catalyst regeneration study. An ANOVA statistical analysis demonstrated that the oxidant/sulfur and catalyst/oil ratios were more significant than the reaction temperature for the ODS of tire pyrolysis oil. It followed the pseudo-first-order kinetics over HPMo/Ti-TUD-1.

Thermal Pyrolysis of Polyethylene in Fluidized Beds: Review of the Influence of Process Parameters on Product Distribution

2012 ◽  
Vol 134 (3) ◽  
Author(s):  
K. Suresh Kumar Reddy ◽  
Pravin Kannan ◽  
Ahmed Al Shoaibi ◽  
C. Srinivasakannan
Keyword(s):  
Fluidized Bed ◽  
Process Parameters ◽  
Fluidized Beds ◽  
Pyrolysis Temperature ◽  
Liquid Product ◽  
Product Distribution ◽  
Major Influence ◽  
Process Conditions ◽  
Influence Of Process Parameters ◽  
Thermal Pyrolysis

The present work is an attempt to compile and analyze the most recent literature pertaining to thermal pyrolysis of plastic waste using fluidized bed reactors. The review is short owing to the small number of work reported in the open literature in particular to the fluidized beds. Although works on pyrolysis are reported in fixed beds, autoclaves, and fluidized beds, vast majority of them address to the utilization of fluidized bed due to their advantages and large scale adaptability. The pyrolysis temperature and the residence time are reported to have major influence on the product distribution, with the increase in pyrolysis temperature favoring gas production, with significant reduction in the wax and oil. The pyrolysis gas generally contains H2, CO, CO2, CH4, C2H4, C2H6 while liquid product comprises benzene, toluene, xylene, styrene, light oil, heavy oil, and gasoline with the variations depending on process conditions. The effects of other process parameters, namely fuel feed rate, fuel composition, and fluidizing medium have been reviewed and presented.

Evaluating strategies for catalytic upgrading of pyrolysis oil in liquid phase

2014 ◽  
Vol 145 ◽  
pp. 10-23 ◽  
Author(s):  
Tu Nguyet Pham ◽  
Dachuan Shi ◽  
Daniel E. Resasco
Keyword(s):  
Liquid Phase ◽  
Pyrolysis Oil ◽  
Catalytic Upgrading

Influence of Hydrocolloid Concentration, Salinity and Citric Acid Addition on Heat Transfer in the Ohmic Heating Process

2011 ◽  
Vol 7 (5) ◽  
Author(s):  
Mostafa Keshavarz Moraveji ◽  
Emad Ghaderi ◽  
Reza Davarnejad
Keyword(s):  
Heat Transfer ◽  
Electrical Conductivity ◽  
Citric Acid ◽  
Ohmic Heating ◽  
Solid Particles ◽  
Heating Process ◽  
Process Conditions ◽  
Heating Rates ◽  
Acid Addition ◽  
Ph Level

In this article, the effects of Ohmic heating process conditions on electrical conductivity and heat transfer were investigated. In order to study the Ohmic heating process, various hydrocolloid solutions containing starch in water with concentrations of 4–8% in the static cells were used. Temperature increments increased electrical conductivity of the solution, linearly. The concentration of dispersed solid particles in the solution caused a progressive trend in time-temperature curve for hydrocolloid solutions (with concentrations of 4, 5.5 and 8%) without electrolytes. The electrical conductivity was raised by increasing temperatures. In order to consider the salinity impact on electrical conductivity and the heating rate, sodium chloride (with concentrations of 1–0.25%) was added to the solution. It was observed that the salt addition to the system had a major effect on electrical conductivity and time-temperature curves. The pH level was modified with Citric acid addition, and the influence of pH level on the time-temperature curves and heating rates were investigated. The Citric acid addition had no on significant effect on the time-temperature curves.

Sign in / Sign up

Export Citation Format

Share Document