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carbon Tag

26 Jul

Posted at 10:49h in Soil & Fertilizers
Durga C* 13 views

कार्बन सीक्वेशट्रेशन (पृथक्‍करण) प्रक्रिया   Carbon capture and storage (CCS) (or carbon capture and sequestration) is the process of capturing waste carbon dioxide (CO2) from large point sources, such as fossil fuel power plants, transporting it to a storage site, and depositing it where it will not enter the atmosphere, normally an underground geological formation. The aim is to prevent the release of large quantities of CO2 into the atmosphere. It is a potential means of mitigating the contribution of fossil fuel emissions to global warming and ocean acidification. Although CO2 has been injected into geological formations for several decades for various purposes, including enhanced oil recovery. Capturing and compressing CO2 may increase the fuel needs of a coalfired CCS plant by 25-40%. These and other system costs are estimated to increase the cost of the energy produced by 21-91% for purpose built plants. Applying the technology to existing plants would be more expensive especially if they are far from a sequestration site. Capture CO2 Capturing CO2 is probably most effective at point sources, such as large fossil fuel or biomass energy facilities, industries with major CO2 emissions, natural gas processing, synthetic fuel plants and fossil fuelbased hydrogen production plants. Extraction (recovery) from air is possible, but not very practical. The CO2 concentration drops rapidly moving away...

01 Jun

Posted at 07:32h in Soil & Fertilizers
Durga C 19 views

बायोचर - कृषि के लिए नया काला सोना Agricultural waste is usually handled as a liability, often because the means to transform it into an asset is lacking. These residues are either partially utilized or un-utilized due to various constraints. Among the cereal residues, rice and wheat straws are the dominant and the easiest way to clear the field is burning these in the field itself. By realizing those problems, some previous researchers try to use the more resistant organic matter such as biochar. Biochar has great importance in improving soil fertility and it could act as a soil amendment to increase crop yield and plant growth by supplying and retaining nutrients than other organic matter such as leaf litter, compost or manure. Conversion of biowaste to biochar is a potential tool for carbon sequestration and reducing GHG emission. Biochar is a fine-grained, carbon-rich, porous product remaining after plant biomass has been subjected to thermo-chemical conversion process at high temperatures with little or no oxygen. The central quality of biochar that makes it attractive as a soil amendment is its highly porous structure, potentially responsible for improved water retention and increased soil surface area. Because of its aromatic structure dominated by aromatic carbon, biochar has been found to be biochemically recalcitrant compared to uncharred, parent organic matter and...

17 Mar

Posted at 06:56h in Soil & Fertilizers
26 views

बायोचर - कृषि का भविष्य The amount of carbon in the soil is a direct indication of good quality of soil. Higher carbon stocks have a direct correlation with increased agricultural yields through improved soil health. In the current scenario of climate change and global warming, much of carbon in atmosphere has to be sequestrated into soil carbon pool so that increasing CO2 in the atmosphere and resulting warming could be reduced. The use of biochar can be a simple yet powerful tool to combat climate change by sequestering much of atmospheric carbon into soil as well as providing an opportunity for the processing of agricultural and other waste into useful clean energy. What is Biochar? Biochar is a solid material obtained from the carbonisation of biomass. Biochar is produced through a process known as pyrolysis, means thermal decomposition of organic material (i.e. wood chips etc, crop waste and manure) under limited supply of oxygen (O2), and at relatively low temperatures (<700°C). This process often mirrors the production of charcoal, which is perhaps the most ancient industrial technology developed by humankind. However, it distinguishes itself from charcoal and similar materials by the fact that biochar is produced with the intent to be applied to soil as a means to improve soil health, to filter and retain nutrients from...