Biofuel

We’re continuing our deeper look into different types of feedstock that Renewable Energy Group (REG) studied in 2009 in the Feedstock and Biodiesel Characteristics Report. This posts two feedstocks are Lesquerella Oil & Linseed Oil.  Here is a link to the main page of feedstocks we have examined so far.

Lesquerella fendleri Oil

Lesquerella fendleri, also known as Physaria fendleri, is part of the mustard family. The common names of this plant are popweed and Fendler’s bladderpod. This silvery-gray perennial has four-petaled yellow flowers that grow on a plant that is about 1 to 16 inches tall. Found in plains and mesas in the southwestern United States, it requires low water usage and is one of the first of the flowering wildflowers in the spring (Source).

Lesquerella produces hairless capsules called siliques which contain 6 to 25 seeds. These seeds contain 20-28% oil with around 62% lesquerolic acid. Lesquerella oil is a source of hydroxyl unsaturated fatty acids, and is useful as a replacement for castor oil in some applications.

While there are benefits from using this seed oil, the dark reddish-brown color of the oil is a potential limiting factor. Potential selective breeding and domestication of the plant may solve this issue, but there haven’t been much momentum at this time. That being said, there have been some studies about growing this plant for its oil and the natural gum in its seed coat for commercial use.

Linseed Oil

Linseed (Linum usitatissimum) is also known as flax in North America. The plant is an annual and can grow in large range of climates. For example, it grows in Argentina, India, and Canada. Linseed oil has been traditionally used as a drying oil. According to REG report, these seeds contains 37-42% oil. The crude oil contains 0.25% phosphatides, a small amount of crystalline wax, and a water-soluble resinous matter with antioxidant properties.

As one the earliest cultivated field crops in the US, it has found many uses for its oils. Linseed oil can be used as a varnish, pigment binder or to manufacture linoleum. These applications have seen reductions in use due to synthetic options that resist yellowing. Other uses for this plant are as nutritional supplements and foods, although raw linseed oil can become rancid unless refrigerated.  After the oil has been pressed out of the seeds, the leftover residue makes great animal food.

As some of the traditional uses of the plant are replaced with other options, use of this crop for a feedstock in biodiesel is an option.

Last article for biodiesel feedstocks was Jatropha Oil, Jojoba Oil, & Karania Oil.

Jatropha Oil, Jojoba Oil, & Karania Oil

We are continuing our deeper look into different types of feedstock that Renewable Energy Group (REG) studied in 2009 in the Feedstock and Biodiesel Characteristics Report. If you would like to see what feedstocks we have talked about, this is the main page and it links to the ones we have examined.

As a reminder, B20 biodiesel (B20 stands for 20% biodiesel and 80% petroleum diesel) is the drop-in solution for reduced emissions in today’s modern diesel engines. To understand some of the alternate feedstocks that can be used for biodiesel, we are examining a report that Renewable Energy Group (REG) produced in 2009. All certificates of analysis and results are for B100.

This post is a bit different as we have only one successful biodiesel created and two failures. The oils are jatropha oil, jojoba oil and karanja oil.

Jatropha Oil

Jatropha oil comes from the shrub Jatropha curcas, also known as physic nut, Barbados nut, poison nut, bubble bush or purging nut. This plant is a succulent that loses its leaves during the dry season. It is best adapted for arid and semi-arid conditions. The resistance to high degrees of aridity allows it to grow in deserts. This shrub can thrive on only 10 inches of rain for a whole year. It is native to Mexico, Central America, Brazil, Bolivia, Peru, Argentina, and Paraguay. Jatropha curcas is considered a shrub or small tree and can reach a height of 20 ft. or more.

 “Shrubs begin to produce when only 4 – 5 months old, and reach full productivity at about 3 years Under good rainfall conditions, nursery plants bear fruit after the first rainy season, while directly seeded plants bear for the first time after the 2nd rainy season. With vegetative propagation, the first seed yield is higher. At least 2 – 3 tonnes of seeds per hectare can be achieved in semi-arid areas.” (Source)

The seeds contain 27% to 40% oil (Source) and develop in 90 days from the flower to the seed. Trees can have a productive life of 40 to 50 years without tending.

Uses of the plant include medical, edible and as a source of oil for biofuels. The young shoots and even young leaves can be cooked and eaten as a vegetable. The nuts can be eaten but they are purgative and, if eaten in large quantities, can be poisonous.

Medicinal uses include uses the juice from the bark as a treatment for malarial fevers and or using it to treat external burns, scabies and ringworm (Source).

The low maintenance and high oil content makes this plant attractive as a biofuel feedstock. In addition to its use for biodiesel, the oil has been made into jet fuels. In 2008, Air New Zealand flew a plane on 50/50 mix of jatropha oil fuel and jet A1 fuel (Source).

Currently biodiesel is being produced from this plant in the Philippines, Pakistan and Brazil.

Jojoba Oil

Golden jojoba oil was produced from the plant called jojoba (Simmondsia chinensis), an evergreen perennial shrub grown in Arizona, Mexico, and neighboring areas. Some of the common names of this are goat nut, deer nut, pignut, wild hazel, quinine nut, coffeeberry and the gray box bush (Source). The dehulled seeds of jojoba contain 44% of liquid wax ester, which is not a triglyceride.

This shrub grows to 3 to 6 feet tall and some can get as tall as nearly 10 feet. The fruit is acorn-shaped and .4 inches to .8 inches long.  The seed is dark brown.

Uses of the plant include forage for wild animals such as deer, bighorn sheep and some livestock. In large quantities, the seed meal is toxic to many animals. The oil is different than many of the feedstocks we have discussed.

“Jojoba is unique in that the lipid content of the seeds, which is between 45 and 55 wt.%, is in the form of long-chain esters of fatty acids (FA) and alcohols (wax esters) as opposed to triacylglycerols (TAG) encountered in other vegetable oils and animal fats” (Source).

Because of this, the Jojoba oil wasn’t made into a biodiesel for this study. According to the REG Report:

“The purpose of this project was to transesterify all the feedstocks using the same procedure and if jojoba was done differently, comparisons could not be made with jojoba methyl esters. Jojoba can be transesterified and used as a fuel using a different process.”

Karanja Oil

Pure, cold pressed karanja oil was purchased from The Ahimsa Alternative, Inc. Karanja (Pongamia pinnata) is a medium sized evergreen tree, and usually about 25 ft. tall but can grow as large as 80 ft tall (Source). The tree has dark green leaves and the very fragrant flowers of lavender, pink and white.  The tree grows in the humid tropic and can be found in India, China, and Japan. The seed contains 27-39% oil.

Karanja is used for oil production and has some successes in India as a feedstock. In regards to this study, they weren’t able to create a biodiesel fuel using the same procedure as the rest of the feedstocks and therefore there isn’t a sample created to test.

REG’s notes about this oil are as follows:

“Esterification was only able to reduce the FFA (Free Fatty Acid) of the oil to 0.7 wt %. Since 0.5 wt % was the maximum amount of FFA allowed in the feedstock, karanja was not made into biodiesel using the standard procedure. A small scale experiment was performed to see what would happen to the karanja when it was transesterified. A 20 gram sample of karanja oil was used, along with the standard ratios of chemicals as in the other feedstocks for the project. After the water wash step, the karanja formed an emulsion with the water and the phases would not separate. No further refining experiments were done to make karanja suitable for transesterification.”

Last article for biodiesel feedstocks was Hemp Oil & High IV and Low IV Hepar

In this post we are going to continue our deeper look into different types of feedstock that Renewable Energy Group (REG) studied in 2009 in the Feedstock and Biodiesel Characteristics Report. The feedstocks we are looking into are Hemp Oil & High IV and Low IV Hepar. Here is a link to the main page of feedstocks we have examined so far.

As a reminder B20 Biodiesel (B20 stands for 20% biodiesel and 80% petroleum diesel)  is the drop in solution for reduced emissions in today’s modern diesel engines.   To understand some of the alternate feedstocks that can be used for biodiesel, we are examining a report that Renewable Energy Group (REG) produced in 2009. All certificates of analysis and results are for B100.

Hemp Oil

Hemp seed oil comes from the plant Cannabis sativa and contains significant amounts of linolenic acid. The hemp oil in this study was sourced out of Canada and these seeds have an oil content of 33 percent.

Based on Industrial Hemp Regulations in Canada:

“Industrial hemp includes Cannabis plants and plant parts, of any variety, that contains 0.3% tetrahydrocannabinol (THC) or less in the leaves and flowering heads.

Industrial hemp also includes the derivatives of industrial hemp plants and plant parts. These do not include the flowering parts or the leaves.

Examples of derivatives that are considered industrial hemp include: hemp seed oil (oil derived from seed or grain) and hemp flour.”

THC is the chemical that has psychoactive properties and is what makes the cannabis Marijuana vs Hemp.

This biodiesel sample was created with seed oil that contained less than .03% THC.

Cannabis sativa is an annual flowering plant that originates in Central Asia and is now spread world-wide. The uses of the plant include seed oil, food, recreation, medicine and industrial fiber. (Source)

The centuries of early human cultivation of these plants has created a large variety of strains that look, grow and act different.  Pictured is an example of what a Hemp or Marijuana plant looks like in bloom.

Hepar, High Iodine Value and Low Iodine Value (IV)

In this situation, Hepar is a byproduct of the heparin manufacturing process. Pharmaceutical grade heparin is derived from the mucosal tissues and of animals, such as pig intestines or cow lungs. (Mucosal tissues are part of the immune system it is the barrier between potential pathogens and the body.) Heparin is a medicine that is used as an anticoagulant.  Since the creation of Heparin is a industry secret, it is difficult to find much information about the byproduct Hepar.

Last article for biodiesel feedstocks was Evening Primrose Oil & Fish Oil

The two feedstocks we are looking into this time are Evening-Primrose Oil and Fish Oil. Here is a link to the main page of feedstocks we have examined so far.  As we continue our deeper look into different types of feedstock that Renewable Energy Group (REG) studied in 2009 in the Feedstock and Biodiesel Characteristics Report.

Evening-Primrose Oil

The Common Evening-primrose (Oenothera biennis) is also known as evening star, sun drop, German rampion, weedy evening primrose, hog weed, King’s cure-all, or fever-plant.  This plant is native to North America and grows throughout most of the continental US and in Canada.

A unique aspect of this plant is that it has a bright yellow flower blooms that is open in the evening and then is closed at noon.(source)  This plant can grow up to 6 feet tall and is a biennial, meaning it lives for 2 years flowering the second year. The plant has leafy branched stems that are ridged and usually has fine white hair.

According to Friends of the wild flower:

“The leaves are both basal and stem. Basal leaves taper to short stalks and form a rosette in the first year of growth. The stem leaves develop the second year when the flowering stem rises; they are alternate, lance-like, wavy edged, slightly toothed, slightly hairy on both surfaces, with one main central vein and fine laterals. They can be up to 8 inches long near the base and 1/4 as wide, but become considerable shorter near the top of the stem.”

A simple google search shows that this plant has medicinal uses, known by some of the indigenous tribes of North America for hundreds of years. Some of the common uses were to treat bruises with a poultice and use the leaves in a tea as a stimulant. The drug in the plant can be used as a sedative and and as an astringent. The oil the plant produces is full of fatty acids and is sold as a dietary supplement.

The roots of the plant can also be boiled and eaten if they haven’t flowered yet. The leaves of the plant can be used before flowering in salads. Even the flowers can be eaten and are said to have a sweet taste.

The ability of the plant to grow in arid conditions and not need a lot of water adds potential of this plant to provide nutrients, oil and medicinal material for drier locations.

Fish Oil

The Fish Oil that REG used simply says “Fish oil was obtained from a commercially available source in Peru.”  The types of fish that are used to make fish oil in Peru are anchovy, herring, menhaden or sardines.

This source was likely the same that would be purchased to produce fish oil nutritional supplements or other food products. In the production of biodiesel there is a large potential for this product. Many of the toxins and imperfections that need to come out for human consumption wouldn’t effect the creation of biodiesel.  Fish oil that is produced in the process of fish processing has potential of removing waste from going to landfills. Several scholarly papers have been written on it.  If you would like to know a little more this article was written on the waste from salmon processing in Canada.

Last article for biodiesel feedstocks was Coconut Oil and Coffee Oil.

We are continuing our deeper look into different types of feedstock that Renewable Energy Group (REG) studied in 2009 in the Feedstock and Biodiesel Characteristics Report. This week’s two feedstocks are Coconut Oil and Coffee Oil. Here is a link to the main page of feedstocks we have examined so far.

Coconut Oil

For this feedstock REG purchased refined, bleached, deodorized (RBD) coconut oil.

As a background, lets talk a little bit about Coconut trees (Cocos nucifera) they are part of the palm tree family (Arecaceae) and they love sandy soils and can tolerate a high level of salt. The trees prefer regular rainfall, high humidity 70-80% and lots of sunshine.  This is why we see them on the shorelines and beaches in the warmer parts of the world. They need year round warmth and moisture to grow well and produce fruit.  The Coconut palm tree can grow up to 98 ft tall and has 13-20 ft long leaves. A tree can begin producing fruit as early as 6 years but usually take between 15 to 20 years to reach its peak producing capacity. Most trees produce about 30 fruit a year but under ideal conditions they can produce as much as 75 a year.  Coconuts can be found in more than 90 countries with most of the production coming from tropical Asia.  The Philippines, India, and Indonesia account for over 72% of the production.

Coconuts already have a variety of uses, as food, cosmetics and animal food. Virtually every part of the palm can be used by humans for economic value.

Production of the oils used for biodiesel requires the coconut meat be removed from the seeds, dried and then pressed for the oil. A coconut that is between 12 to 15 months old is best for this.  You can expect to get about 50ml of oil per nut. The remaining meal is then able to still be used as an animal feed or can even be turned into a flour for baking.

Coffee Oil

Coffee comes from roasted coffee beans, these “beans” are actually the seeds from berries of the Coffea species, with the two most common species being C. arabica and C. canephora. People have been drinking coffee since the 15th century.  Coffee plants are evergreen shrubs that can grow up to 15 feet tall. They have glossy, dark-green leaves about 4 to 6 inches long.  Brazil, Vietnam, and Colombia are were most of the coffee is coming from.

Most Coffee grounds are thrown away or used as compost, but if we were to extract the oil possibilities arise. Coffee oil comes from spent coffee grounds; the grounds can contain as much as 11 to 20 percent oil. Extracting the oil doesn’t stop the grounds from being used as compost and you now have an oil that can be converted into biodiesel.  In the past the process of extracting the oil was cost prohibitive and took many steps to complete. There have been some recent advances in this process that could change this in the future. This method, if used on all coffee grounds, could produce over 286 million gallons a year of biodiesel.

Last article for biodiesel feedstocks was Castor Oil and Choice White Grease.

In this post we continue our deeper look into different types of feedstock that Renewable Energy Group (REG) studied in 2009 in the Feedstock and Biodiesel Characteristics Report. This week’s two feedstocks are Castor Oil and Choice White Grease. For more information and more feedstocks this is the main page of the feedstocks we have examined so far.

Castor Oil

Castor oil comes from Ricinus communis, known commonly as the castor bean plant. While the castor bean is not a real bean, it is called this due to the shape of the seeds.  These seeds consist of about 45-50% oil. Ricinus communis is a fast-growing shrub type plant that can reach the size of a small tree. This perennial flowering plant is native to the southeastern Mediterranean Basin, Eastern Africa, and India, but grows easily throughout tropical regions. It is not a cold hardy plant, although in a suitable environment it can become invasive.  Castor bean plants are grown as ornamental plants throughout the world and are used extensively as a decorative plant in parks and public areas. The castor bean plan will grow rapidly in a single season, about 6-10’ tall. Ornamentally, it is most valued for its huge, palmately (having four or more lobes or leaflets radiating from a single point) 5-11 pointed lobes, toothed, glossy green leaves (each to 1-3’ across) and round, spikey, reddish-brown seed capsules. Small cup-shaped, greenish-yellow apetalous (lacking flower petals) spikes which are not particularly showy. Different cultivations of the plant result in dwarf and large plants, some with attractive reddish, bronze or purple leaves and bright and colorful flowers.

An additional benefit of this source of oil is that it doesn’t impact the food supply. The entire plant is poisonous, but has some reported medicinal uses. Other uses of the plant include being used as an insecticide against some ticks and food for silkworms. Castor oil has been used as a lubricant in engines for years, because of the high heat resistance it has historically been used in two-stroke engines.

Choice White Grease

The US Department of Agriculture defines Choice White Grease (CWG) as “A specific grade of mostly pork fat defined by hardness, color, fatty acid content, moisture, insolubles, unsaponifiables and free fatty acids.”

CWG is similar to beef tallow that we discussed in a previous week. It is an animal by-product, meaning that they are only produced in relation of raising the animal for meat or food production. As we can see from the picture it is a saturated fat and is at least partially solid at room temperature. This means that the resulting B100 biodiesel will have a higher cloud point.  CWG has historically been used as livestock feed. Additionally, using CWG for biodiesel gives pork producers an additional revenue and outlet for the product, helping elevate the return on investment for these farmers.

Last article for biodiesel feedstocks was Algae Oil and Canola Oil.

This post’s two oils are Algal Oil and Canola Oil.  If you would like to look ahead at some of the other feedstocks that Renewable Energy Group (REG) studied, or if you would like to look a little more in-depth at the comparisons here is the link to the Feedstock and Biodiesel Characteristics Report.   This is the main page of feedstocks we have looked at so far, and last weeks look at Borage Oil & Camelina Oil is here.  B20 Biodiesel (B20 stands for 20% biodiesel and 80% petroleum diesel)  is the drop in solution for reduced emissions in today’s modern diesel engines.  To understand what some of the alternate feedstocks that can be used for biodiesel, we are examining a report that Renewable Energy Group (REG) produced in 2009. All certificates of analysis and results are for B100.

Algal Oil

Algal Oil has a huge potential to be the next source of Biofuel feedstock. Among the many benefits is that algae can be grown in any environment that can contain water, and algae doesn’t carry the negative stigma of using a potential source of food to create a fuel.  In addition, you could use algae to clean up waste water and then use the fats to create the biodiesel. A recent study here is working on that concept. The U.S. Department of Energy has recently invested $2 million dollars into University of Michigan for research into algae as a diesel fuel. (see story here) The goal is to find high yield algae that produce a high grade bio crude for renewable diesel or biodiesel. Here is the YouTube video about the research.

The two diverse samples of crude algal oil, that were used in the report from 2009, were obtained from Solazyme, Inc.  This Company works with algae to produce renewable oils and ingredients for industries. The report doesn’t go into what kinds of algae was used or the process that they used to convert the algae to oil.

Canola Oil

Canola is the seed of the species Brassica napus or Brassica campestris. Brassica Napus is also known as rape or rapeseed.  The name rape is derived from the Latin word for turnip, rapum.  Brassicaceae is the family of which mustard, cauliflower and cabbage belong.  The name Canola comes from the contraction of Canada and ola, meaning oil.  Developed in 1970s by researchers from the University of Manitoba and Agri-Food Canada, the use of the term Canola means that the oilseed meets certain standards.  The Official Definition of Canola is:

“Seeds of the genus Brassica (Brassica napus, Brassica rapa or Brassica juncea) from which the oil shall contain less than 2% erucic acid in its fatty acid profile and the solid component shall contain less than 30 micromoles of any one or any mixture of 3-butenyl glucosinolate, 4-pentenyl glucosinolate, 2-hydroxy-3 butenyl glucosinolate, and 2-hydroxy- 4-pentenyl glucosinolate per gram of air-dry, oil-free solid.”

Government regulation requires Canola oil to to be limited to a maximum of 2% erucic acid these particular samples contains less than two percent erucic acid and the solid component contains less than 30 micromoles per gram of glucosinolates.

According to Reuters, “Rapeseed is the most produced oilseed in the EU.” This trend is gradually shifting to soya beans this article continues to explain. Currently 60 percent of the vegetable oil used in biodiesel comes from rapeseed oil in the EU.