The phrase "alkali catalyst" is correct and usable in written English.
It can be used in contexts related to chemistry, specifically when discussing substances that facilitate reactions in alkaline conditions.
Example: "The reaction was significantly accelerated by the addition of an alkali catalyst, which improved the overall yield."
Alternatives: "basic catalyst" or "alkaline catalyst".
It is manufactured by heating sodium formate in the presence of an alkali catalyst, by oxidizing carbohydrates with nitric acid, by heating sawdust with caustic alkalies, or by fermentation of sugar solutions in the presence of certain molds.
The developed process was capable of producing biodiesel at high purity using an alkali catalyst.
Experiments were designed to determine how variations in molar ratio of methanol to oil in seeds, amount of alkali catalyst, time and temperature affected the yield.
However, due to its high concentration of free fatty acids (FFA), its use in the conventional process that uses alkali catalyst has been limited.
The trans-esterification of cottonseed oil using strong alkali catalyst and using multi walled carbon nano tubes as catalyst to produce biodiesel was studied.
Pre-treatment with phosphoric acid modified β-zeolite in acid catalyzed esterification process preceded by transesterification which was done using conventional alkali catalyst potassium hydroxide (KOH).
Effects of the DNI, the flow rates and concentration of the feedstocks as well as alkali catalysts addition were investigated.
However, due to its recalcitrant nature, hydrolysis of cellulose with solid alkali catalysts still remains a challenge.
The process was conducted with ultrasonic assistant and carbon-based solid alkali catalysts, and the maxim yield of lignocelulosic hydrolysate esters (LHE) could reach 88.5%, with 81.3% content of monoester.
Biodiesel is produced from the transesterification of vegetable oils or animal fats using simple alcohols (methanol or ethanol) and alkali catalysts.
The influence of methanol to seed ratio (2 1 6:1), amount of alkali (KOH) catalyst (0.05 0.1 mol/L in methanol), stirring speed (700 900 rpm), temperature (40 60 °C) and reaction time (3 5 h) was examined to define optimum biodiesel yield and biodiesel quality after water washing and drying.
