How much does it cost to utilize biofuel?
Carbon offsets may be generated by any type of project that reduces or eliminates greenhouse gas emissions beyond a business-as-usual scenario. Common forms of offset projects include reforestation and improved forest management, methane gas capture and destruction, fuel switching, clean cookstoves, and energy efficiency. There are many more kinds of projects that will generate carbon offsets however. To get a feel for what project types exist, visit the methodologies page for the standards mentioned above.
The most frequent kinds of biofuels are biodiesel, from oil-rich plants, and bioethanol from starch, which are referred to as first generation biofuels.
First-generation biofuels have the benefit of reducing the overall greenhouse gas emissions and zero carbon production in some instances whilst the carbon emitted during burning of biofuels is compensated by the carbon absorbed by the plants during growth.
Second-generation biofuels, on the other hand, are technologies which are still in development. This new technology focuses on producing second-generation biofuels by microbial fermentation of non-food crops.
Other sources include woody biomass from forestry, paper pulp, sawdust, bagasse, straw, stover, household food and garden waste. Know more about Decarbonization Consulting.
The carbon footprint and overall energy yield will be drastically improved when compared to first generation biofuels as there's no need for cultivating or harvesting the crops.
Biofuel Production
Bioethanol is conventionally produced through the enzymatic conversion of starchy biomass into sugars or fermenting 6-carbon sugars. Ethanol can also be produced from feedstocks like cassava, sorghum, potatoes, sugar beets, sugar cane, corn (maize) and cereal crops.
Researchers are now actually concentrating on using ligno-cellulosic materials for advanced bioethanol production. Including pre-treating biomass to produce hemicellulose and cellulose, hydrolysis to produce fermentable 5- and 6-carbon sugars, separation of non-hydrolysed cellulose and solid residues followed closely by distillation.
Biodiesel is created by trans-esterification of fats and vegetable oils via the addition of methanol and a catalyst, yielding glycerol as a by-product.
Other feedstocks include palm oil seeds, soy seeds, sunflower seeds and rapeseeds. Advanced methods include replacing methanol of fossil fuels with bioethanol, which yields fatty acid ethyl ester as opposed to fatty acid methyl ether.
Recent advancements in the production methods include hydrogenation of fats and oils for producing biodiesel that will blend with fossil diesel as much as 50% without modifying engine efficiency.
What are co-benefits?
Co-benefits are positive outcomes from the carbon offset project, beyond the actual greenhouse gas emissions reductions. Co-benefits might be social, economic, or environmental. Samples of co-benefits include jobs created, health advantages, pollution mitigation (other than carbon), supporting gender equality, renewable energy generation, biodiversity, and education. Co-benefits are often the deciding factor in carbon offset purchases. Many carbon offset developers list the project co-benefits when it comes to how they donate to the UN Sustainable Development Goals.