Experimental design for extraction of bio-oils from flax seeds under supercritical ethanol conditions
A central composite design was applied to the extraction of bio-oils from flax seeds under supercritical ethanol (Sc-EtOH) conditions. The effects of three factors (temperature, time, and biomass concentration) on bio-oil and biomass conversion yields were examined. Extraction temperature was statistically found to be the most significant factor which affected both bio-oil yield and biomass conversion. The predicted results matched the experimental results with the following coefficient of determination: (R 2) 0.95 for bio-oil yield and 0.92 for biomass conversion yield. The composition of bio-oils consisted mainly of fatty acid ester derivatives, and other oxygenated hydrocarbons. Based on the relative concentrations of the compounds, the major compound was ethyl oleate.
To master the process and equipment risk involved in gasifier of the corporate methanol workshop gasfication section,the article used the method of hazard and operability study to analyse,obtained in some situation such as high temperature in combustion,low temperature in combustion,surface of high temperature,high pressure in combustion chamber,low pressure in combustion chamber,high different pressure between the gas of export and combustion chamber,high liquid level and low liquid level.there may be reasons and consequences,and puts the recommendation measures to improve the operational reliability of the gasifier,aiming at safety production to the corporate.