Southern Brazilian Journal of Chemistry, Volume 26, No. 26, 2018最新文献

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System of Adsorption of CO2 in Coalbed 二氧化碳在煤层中的吸附体系

Southern Brazilian Journal of Chemistry, Volume 26, No. 26, 2018 Pub Date : 2018-06-30 DOI: 10.37633/sbjc.26(26)2018.2-9

M. A. Klunk, S. Dasgupta, M. Das, Z. Shah

{"title":"System of Adsorption of CO2 in Coalbed","authors":"M. A. Klunk, S. Dasgupta, M. Das, Z. Shah","doi":"10.37633/sbjc.26(26)2018.2-9","DOIUrl":"https://doi.org/10.37633/sbjc.26(26)2018.2-9","url":null,"abstract":"Carbon capture and storage (CCS) has been observed as an alternative measure to mitigate emissions from greenhouse gases. CCS systems separate CO2 during the process of converting fuel and transport to the facilities where they are stored, e.g., under geological formation conditions. Capture and sequestration technologies are now widely used in different industries. CO2 capture is currently a costly and energy-consuming technology. The costs obviously depend on the size of the plant and the type of fuel used. Generally, capture systems are categorized into three categories: pre-combustion, post-combustion, and oxy-fuel combustion. The saline aquifer, depleted oil, and gas fields are large-capacity storage sinks. The coalbeds also provide as a substitute to geological storage. One of the main advantages of coal storage is renewable methane fuel and coal desulfurization. The studied coal reserves are located in Candiota, State of Rio Grande do Sul, Brazil. These are the largest coal deposits in the country, with a reserve of 1 billion tons. This work will represent a study on CO2 storage in Candiota coalbed system. The use of a synthetic CO2 cylinder with a flow of 0.2 L /min varies the time of contact with the coalbed. The results from the volatile matter increase by 11%. The results of the ultimate analysis exhibited an 8% increase for carbon and oxygen after 60 minutes of CO2 flow in the coalbed. On the other hand, there was a reduction of 32% for sulfur. The resultant phenomena occur due to the adsorption capacity of CO2, where the compounds are released from the pores of coal","PeriodicalId":405634,"journal":{"name":"Southern Brazilian Journal of Chemistry, Volume 26, No. 26, 2018","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115042152","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Waste Frying Oil Transesterification Treated by Steam Drag Method 蒸汽拖曳法处理废煎炸油酯交换反应

Southern Brazilian Journal of Chemistry, Volume 26, No. 26, 2018 Pub Date : 2018-06-30 DOI: 10.37633/sbjc.26(26)2018.34-42

Danielle Marins, M. Cardoso, Mara Eliza Santos, Jeferson Massinhan

{"title":"Waste Frying Oil Transesterification Treated by Steam Drag Method","authors":"Danielle Marins, M. Cardoso, Mara Eliza Santos, Jeferson Massinhan","doi":"10.37633/sbjc.26(26)2018.34-42","DOIUrl":"https://doi.org/10.37633/sbjc.26(26)2018.34-42","url":null,"abstract":"Demand for diversified biodiesel feedstocks is high and increasing, but few are viable for large-scale production, and many of those selected compete with other sectors of the chemical industry. To improve energy and environmental sustainability, fatty acids from waste oils that are improperly disposed of and pollute the environment can be used for transesterification reactions. However, they need treatment to achieve high conversion rates. In this context, the aim of this work was to perform and analyze the treatment of residual frying oil with the evaporation and entrainment process, aiming at its use as raw material to obtain biodiesel (methyl esters) by a transesterification reaction. The physicochemical properties of the residual oil after treatment were characterized by moisture content, pH and the acidity, saponification, iodine, and peroxide index. The conversion rate of the residual oil to methyl esters was determined by 1H NMR analysis. After the treatment, the method of analysis of variance showed that the oil obtained a significant reduction of the saponification, iodine, peroxide and acidity indexes, being the acidity reduced from 9.36 to 7.85 mg KOH g-1. The moisture content of 0.733 % and elevation of pH to 8.0. The conversion rate of fatty acid biodiesel of residual oil was 79.3 %, lower value of standards norms (ASTM, 2005; EN, 2008; ANP, 2014), showing that the assigned methodology for frying residual oil is inefficient in biodiesel production","PeriodicalId":405634,"journal":{"name":"Southern Brazilian Journal of Chemistry, Volume 26, No. 26, 2018","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126035580","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0