CO2 Extract
Generic CO2 Hop Extract is a pure, soft resin extract of high alpha hops prepared using supercritical carbon dioxide in a precisely controlled extraction process. CO2 Hop Extract contains all the α-acids, β-acids, and essential oils found in hops, and offers the brewer added efficiency and flexibility in the brewhouse. Compared to raw hops or hop pellets, CO2 hop extract represents a convenient and concentrated alternative to traditional brewing ingredients. Because the brewing characteristics of the original hops are maintained, an early addition to the kettle imparts mainly bitterness while a late addition will result in a carryover of the volatile oils with aromatic late hop character. The aroma of the extract is described as herbal, floral, piney or citrus. Perception of hoppy character and various related notes in resulting beers will be variety specific, and dependent on the quantity of extract added and the time of addition during kettle boil.
Product Specifications:
Description: Depending on the extraction conditions and the hop variety, the color of the
extract can vary from yellow to dark green. It is a semi-fluid paste at room
temperature, but becomes more fluid when heated.
Density: 0.9 – 1.0 g/mL
Viscosity: Approx. 1 – 3 Pas at 86 – 104 °F, (depending on variety).
α-acids: Typically 50 - 60% (depending on variety)
β-acids: Typically 15 - 40% (depending on variety)
Hop oils: 3 – 12 mL/100 g (depending on variety)
Process Specifications for Supercritical CO2 Hop Extract:
Carbon dioxide quality: Food grade CO2
Extraction temperature: 122 – 150 °F
Extraction pressure: 150 – 300 bar
Product Use:
Generic CO2 Hop Extract is primarily used as a kettle ingredient to provide clean bitterness and hop character to beer. Use generic CO2 Hop Extract in the beginning of the boil for bitterness and towards the end for aroma. Extract additions should only be made in a rolling boil to avoid product clinging to the sides of kettle. The extract comes packaged in 100% food grade tins that can be added directly to the boil.
When compared to non-isomerized pellets and raw hops typically within the range of 32 - 38%, utilization of α-acids in beer is slightly better. When added late in the boil, utilization of α-acids will be considerably reduced. The quantity to be added is calculated using the α-acids content and the estimated utilization. Actual utilization may vary depending on plant and processing parameters (35% is used as an average for calculation purposes).
Use Rate Calculations:
GmAA = IBU x (BBL/0.8522)
3.5**
Where:
GmAA = grams of alpha acids to be added in the brew kettle
IBU = the desired amount of bitterness units from the addition
BBL = barrels of finished beer
Note: Use rates may vary depending on the brewing process and the desired hopping level.
* If you would like to change the efficiency from 35%, adjust the 3.5 in the equation.
32% efficiency will change this value to 3.2 and 38% efficiency will adjust to 3.8.
Examples:
You would like to make an IPA and provide a majority of your bitterness using Generic CO2 hop extract in the first addition. You are brewing on a 30 BBL system and want this extract addition to give you 60 IBU towards your total IBU’s for the brew.
GmAA = 60 x (30/0.8522) = 603.48 GmAA = 603.5 GmAA
3.5
You would like to make an American Style Pilsner and provide all your bitterness from extract with some aroma additions at the end of the boil. Your target IBU’s are 15 and the aroma addition at knockout will provide 0 IBU’s towards the final bitterness.
GmAA = 15 x (30/0.8522) = 150.87 GmAA = 150.9 GmAA
3.5
Analysis:
α-acids and β-acids are measured by HPLC with the International Calibration Extract as reference.
Packaging:
Standardization of the α-acids content can be achieved by adjusting the weight of extract in each
container; each tin is weighed in grams of alpha acids. To meet your needs, the following tin sizes are available for purchase.
150 gram of α-acids
300 gram of α-acids
450 gram of α-acids
Storage and Best-by Recommendation:
CO2 Hop Extract is exceptionally stable when properly stored. Hop oils are preserved in the same
condition as they were in hops. CO2 Hop Extract should be stored at temperatures between 32 – 41 °F and are best if used within 8 years after processing. If stored at ambient conditions (77 °F) extracts should be used within 3 years. Once opened, containers should be used within a few days.
Technical Support:
We will be pleased to offer support on the use of CO2 Hop Extract in brewing. For assistance, please contact our knowledgeable staff at 1-800-952-4873 or e-mail info@alphaanalyticstesting.com
