Caffeine Extraction using Advanced Supercritical Fluid Extraction Method
With technological innovation (industry 4.0) happening around the world manufacturing processes are becoming automated and smarter. Let’s see how the caffeine extraction market is becoming smarter with Supercritical Fluid Extraction methods.
Do know how caffeine extraction process works?
Coffee is the main source of caffeine in our daily consumption. Here are the studies showing the caffeine content of green coffee beans. It varies according to the species: C. arabica contains about 1.0–1.2 % and C. canephora (robusta) about 1.6–2 %.
Our day starts with it and it is your best beverage throughout the day to keep you up all day. Coffee is one of the most favourite beverages in the world and everyone around takes it every day. Read on to know more about caffeine content and caffeine extraction process in detail.
Studies have reported the effect of caffeine on cardiovascular diseases and on the central nervous system. So there is a need for decaffeination. Let’s see how caffeine is removed from your coffee.
Decaffeination methods use organic solvents (mainly methylene chloride and ethyl acetate), or water or supercritical carbon dioxide.
The history behind Caffeine Extraction
Methylene chloride was first used for the extraction of caffeine until the mid-1970s. However, subsequently, doubts have arisen about its risk to humans, due to the high toxicity in methylene chloride.
Later on, the solvent selected as ethyl acetate, a natural component detected in coffee aroma and found to occur naturally in many fruits. The main disadvantage with ethyl acetate was due to its high flammability and to its characteristic odour, which remains in the coffee.
After that decaffeination using water was developed in Switzerland which called a green process with respect to the product. Unfortunately, water is not a particular selective solvent and, therefore, not only caffeine but also various flavours were also removed from coffee beans. As a result, less flavourful coffee was tested and rejected by people.
Caffeine Extraction Market
According to Grandview Market Research, the global caffeinated beverage market size was valued at USD 202.63 billion in 2018. The market is estimated to expand at a CAGR of 6.81% from 2019 to 2025. Rising awareness about the health benefits of caffeine drinks, such as increased metabolism and strength, will boost the product demand, thereby augmenting the market growth.
Moreover, rising income levels and improved standards of living in emerging regions, such as China and India, are anticipated to have a positive impact on market growth. In addition, rapidly expanding e-commerce sector across the globe provides numerous growth opportunities to the market.
Supercritical Fluid Extraction or CO2 Extraction Process
Then Supercritical Fluid Extraction was introduced. It has proven to be the best selective process for removing just caffeine and not the other flavor.
Supercritical fluid extraction technology has become an alternative to conventional processes, its specific characteristics, mainly, the solvent power at the supercritical phase with varying pressure and temperature. In this process, first, the coffee beans are soaked in water and then coffee beans pour in a stainless steel extractor vessel. The extractor is clamped and liquid CO2 is forced into the coffee beans at pressures of 200–300 bar to remove the caffeine from the coffee beans.
Here the CO2 is acted as the solvent. It dissolves and draws the caffeine from the coffee beans and the larger-molecule flavor components left behind. Then it transferred to the Separator. Here the pressure is released and the CO2 is recycled into the gaseous state, leaving the caffeine behind. The used CO2 gas is then pumped back into the CO2 storage tank reuse and water is removed through a water separator.
The increasing demand for the drug in pharmaceutical and oil or other essential extraction in processing industries are the major factors fueling the growth for the Supercritical Co2 Fluid Extraction Plant market, according to research, Global Supercritical Co2 Fluid Extraction Plant market is projected to grow at a CAGR of 6.7% between 2017–2021.
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