How much does it cost to make use of biofuel?
Carbon offsets can 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 lots of more forms of projects that can generate carbon offsets however. To obtain a feel for what project types exist, look at the methodologies page for the standards mentioned above.
The most typical forms of biofuels are biodiesel, from oil-rich plants, and bioethanol from starch, which are known as first generation biofuels.
First-generation biofuels have the benefit of reducing the general greenhouse gas emissions and zero carbon production in some cases while the carbon emitted during burning of biofuels is compensated by the carbon absorbed by the plants during growth.
Second-generation biofuels, on another hand, are technologies which can be still in development. This new technology is targeted 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 Biofuel Consultants.
The carbon footprint and overall energy yield will undoubtedly be drastically improved when compared to first generation biofuels as there is no significance of 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 actually emphasizing using ligno-cellulosic materials for advanced bioethanol production. Including pre-treating biomass to produce hemicellulose and cellulose, hydrolysis to release fermentable 5- and 6-carbon sugars, separation of non-hydrolysed cellulose and solid residues followed by distillation.
Biodiesel is made 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 rather than fatty acid methyl ether.
Recent advancements in the production methods include hydrogenation of fats and oils for producing biodiesel that could blend with fossil diesel as much as 50% without modifying engine efficiency.
What're co-benefits?
Co-benefits are positive outcomes from a carbon offset project, beyond the particular greenhouse gas emissions reductions. Co-benefits might be social, economic, or environmental. Types of co-benefits include jobs created, health benefits, pollution mitigation (other than carbon), supporting gender equality, renewable energy generation, biodiversity, and education. Co-benefits are usually the deciding aspect in carbon offset purchases. Many carbon offset developers list the project co-benefits in terms of how they subscribe to the UN Sustainable Development Goals.