Pyrolysis of water buffalo manure: Influence of temperature and alkali hydroxide additives on the quality of bio-oil

Preservatives are used in a wide field of application to maintain the quality of products. They are used to deal with the chemical, physical and microbiological problems and the constraints of the development of several formulations. In this work, we tested the stability of antimicrobial preservatives which are the parabens under different stress degradation conditions to evaluate their degree of effectiveness. The tested parabens were incubated in different solutions at different pH, Temperatures, light conditions, and presence or absence of sucrose in solution (create a medium similar of syrups). The HPLC was used for the assay, by a validated method for the parabens assay and the statistical analysis of the data is carried out by JMP software. The results show a direct influence of temperature and pH on the level of parabens, while the influence of light remains negligible. The increase in temperature gives a degree of immunity of parabens levels, especially with the extreme values of pH. This study is one of the first studies of forced decomposition of parabens carried out under the various conditions suggested. The results give an idea of the stability profile of the tested parabens and suggest a model of the conditions of conservation and use of these products in different domains and under different conditions.

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Analysis of Bio-Oil Produced by Co-Pyrolysis of Mahua Seed and Polystyrene

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.787.771 ◽

2015 ◽

Vol 787 ◽

pp. 771-775

Author(s):

Debalaxmi Pradhan ◽

R.K. Singh

Keyword(s):

Heating Rate ◽

Fossil Fuel ◽

Synergetic Effect ◽

Blend Ratio ◽

Yield And Quality ◽

Bio Oil ◽

Quality Of Products ◽

Temperature Heating

TheProduction of biofuel from biomass sources is believed to reduce the reliance of fossil fuel and its cost. This investigation was aimed to produce and characterize the bio-oil obtained from co-pyrolysis. Two different feed stocks were used for co-pyrolysis; one is Mahua seed (MS) and the other one is Polystyrene (PS). The effect in addition of plastic to biomass in pyrolysis process were investigated on the yield and quality of products. Experiments were conducted in a semi-batch pyrolysis reactor under various parameters of temperature, heating rate and blending ratio. The results indicated that a temperature of 525 °C, and blend ratio of 1:1is maximumwith a heating rate of 20 °C/min. The yield of bio-oil obtained from the co-pyrolysis was found to be approximately 71%, which was higher about 22% than that of yield obtained from pyrolysis of Mahua seed (MS) alone. Further the bio-oil was characterized using different spectroscopic and chromatographic analyses. The analysis of the results for characterization of bio-oil indicated that the synergetic effect increased the bio-oil yield and its quality.

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Effect of torrefaction and fractional condensation on the quality of bio-oil from biomass pyrolysis for fuel applications

Fuel ◽

10.1016/j.fuel.2021.122959 ◽

2022 ◽

Vol 312 ◽

pp. 122959

Author(s):

Soheil Valizadeh ◽

Daejun Oh ◽

Jungho Jae ◽

Sumin Pyo ◽

Hoyeon Jang ◽

...

Keyword(s):

Biomass Pyrolysis ◽

Bio Oil ◽

Fractional Condensation

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Development of Toxic Degradation Products during Heat Sterilization of Glucose-Containing Fluids for Peritoneal Dialysis: Influence of Time and Temperature

Peritoneal Dialysis International ◽

10.1177/089686089501500106 ◽

1995 ◽

Vol 15 (1) ◽

pp. 26-32 ◽

Cited By ~ 35

Author(s):

Per Kjellstrand ◽

Evi Martinson ◽

Anders Wieslander ◽

Björn Holmquist

Keyword(s):

Peritoneal Dialysis ◽

Glucose Solution ◽

Degradation Products ◽

General Pattern ◽

Low Ph ◽

Uv Absorbance ◽

Influence Of Temperature ◽

In Vitro Systems

Objective Fluids for peritoneal dialysis (PD) cause cytotoxic reactions in many different in vitro systems. The low pH, the high osmolality of the fluids, and the glucose degradation products formed during heat sterilization have been considered responsible. In the present study, we investigate the influence of temperature and time during heat sterilization of PD fluids and glucose solutions on glucose degradation and cytotoxicity of the solutions. Design Ampoules containing PD-fluid or glucose solution were heated in an oil bath to predetermined F o values (combinations of time and temperature giving equal energy/bacteriallethality). Cytotoxicity of the solutions was measured as groWth inhibition of cultured L-929 fibroblasts. Glucose degradation was measured as UV absorbance at 228 and 284 nm. Results The same general pattern was seen in both PD fluid and glucose solution. Cytotoxicity decreased from 90% to 15% when the sterilization temperature was increased from 115° to 140°C and concomitantly the length of time shortened in order to maintain equal bacteriallethality. Under the same conditions, degradation products, measured as UV absorbance at 284 nm, decreased from 0.2 to 0.02. Conclusion To minimizethe development of cytotoxic breakdown products, high temperatures over short periods of time should be used to heat-sterilize PD fluids. Even as small an increase as 5°C at around 120°C will improve the quality of the solutions.

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