WEBJun 17, 2019 · The liquefaction of biomass is an important technology to converse the biomass into valuable biofuel. The common technologies for liquefaction of biomass are indirect liquefaction and direct liquefaction. The indirect liquefaction refers to the Fischer–Tropsch (F–T) process using the syngas of biomass as the raw material to .
WEBOct 1, 2016 · Direct coal liquefaction (DCL) is an important way of coal conversion and is important to the global energy industry. In this paper, a typical liquefied coal–Naomaohu coal (NMHC)–was liquefied under mild conditions (400 °C, initial H 2 pressure of 3 MPa), and a NMHC conversion of % was obtained with an oil+gas yield of %. In the ...
WEBDOI: / Corpus ID: ; Thermal, hydrothermal liquefaction, and electromagnetic processes for biomass conversion article{Quitain2022ThermalHL, title={Thermal, hydrothermal liquefaction, and electromagnetic processes for biomass conversion}, author={Armando T. Quitain and .
WEBMar 1, 2015 · The increasing demand for petroleum and the limited fossil fuel storage has urged great efforts and researches on improving current fuel and energy conversion technologies [1]. The coal liquefaction technology has become an effective way of clean utilization of coal for not only the preparation of high calorific value fuels [2], but also a ...
WEBMay 21, 1996 · The cyclohexane conversion of coal was also alyzed. ... Direct liquefaction (DCL) processes and technology for coal and biomass conversion. 2011,,, 105154. DOI: / ... A new process for alytic liquefaction of coal using dispersed MoS 2 alyst generated in situ with added H 2 O. .
WEBJun 3, 2022 · Status of Biomass Combustion Technology. Biomass combustion is applied in many situations, for example, cooking or heating in, producing steam or hot oil for industrial process, and power generation in utility power plant. In general, biomass is a process of solid combustion and a typical gas–solid chemical reaction.
WEBCharacterization of Oxygenated Species in Coal Liquefaction Products: An Overview. ... Z. R. Ismagilov. The relationship between the molecular composition of coal and the conversion of its organic matter during thermal dissolution. Carbon Letters 2022, 32 (4 ... (DCL) processes and technology for coal and biomass conversion. 2011 ...
WEBJul 1, 2006 · Direct coal liquefaction (DCL) converts solid coal (H/C ratio ≈ ) to liquid fuels (H/C ratio ≈ 2) by adding hydrogen at high temperature and pressures in the presence or absence of alyst.
WEBSep 1, 2015 · The heavy organic components in the direct coal liquefaction residue (DCLR), such as asphaltene (AS) and preasphaltene (PA) have significant influence on the direct coal liquefaction (DCL) technology. In this paper, the molecular structure and size of two types of AS and PA from the DCLR of 6 t/d Shenhua process developing unit .
WEBDec 1, 2003 · This paper reports detailed process designs and cost assessments for production of clean liquid fuels (methanol and dimethyl ether) by indirect coal liquefaction (ICL). Gasifiion of coal pro ...
WEBNov 1, 2011 · Several experimental studies have been conducted for coprocessing coal and biomass using direct liquefaction processes [10,20,21], but those processes have been barely modeled at either equipment ...
WEBOct 1, 1996 · Introduction Waste materials are increasingly being studied as coliquefaction agents for the firststage conversion of coal to liquid fuels. In a conventional direct coal liquefaction (DCL) process, firststage conversion refers to the formation of relatively heavy products (in the asphaltene and preasphaltene range) from the coal.
WEBJun 9, 2013 · Liquefaction process is one of the wellknown oldest methods among the thermochemical biomass conversion routes and there is an increasing interest in biomass liquefaction. Liquefaction process ...
WEBJan 15, 2021 · Hydrothermal liquefaction is one of the most promising technologies to convert high moisture biomass into biofuels. However, understanding the liquefaction mechanism of different biomass fractions is still a challenge. The liquefaction of both lignin and cellulose is frequently studied, but the high diversity of biomass and processes .
WEBDCL technology was invented by Friedrich Bergius in 1913. This technology directly produces liquid fuels from coal with the basic process that dissolves coal at high temperature and pressure and adds hydrogen to increase the hydrogen content [11]. DCL is the most efficient technology among the three current technologies.
WEBNov 1, 2011 · Some researchers have reported that coliquefaction of biomass and coal under mild condition (about 350°C) has higher conversion and oil yield than those that would be predicted based on a simple ...
WEBNov 15, 2002 · Coal gasifiion is presented in terms of the chemistry of coal conversion and the product gas characteristics, the historical development of coal gasifiers, variations in the types and performance of coal gasifiers, the configuration of gasifiion systems, and the status and economics of coal gasifiion. In many ways, coal gasifiion .
WEBJan 1, 2023 · Direct coal liquefaction (DCL) commonly refers to alytic hydrogenation of coal in a recycled oil solvent at high pressures with a alyst. While a range of process configurations have been proposed, the most common version involves at least two high pressure slurry reactors in a series using a dispersed ironbased alyst and hydrogen ...
WEBApr 16, 2015 · The effect of hydrotreatment of liquefied heavy oil on direct coal liquefaction (DCL) was studied by hydrogenating the liquefied heavy oil (initial boiling point greater than 320 °C) in a 30 ml ...
WEBJan 23, 2015 · Coal liquefaction, currently termed coal to liquids (CTL) [], is a chemical process for producing synthetic transportation fuels from coal to replace or supplement conventional supplies of diesel oil and gasoline derived largely from petroleum [].Technologically, there are two primary routes for CTL production—direct coal .
WEBFeb 1, 2000 · Maximum conversion (98%) and maximum oil + gas yield (70%) from this coal were obtained by impregnating AHM onto coal and carrying out liquefaction in H2/tetralin system at 450 °C for 30 min.
WEBHTL, also called hydrothermal upgrading, hydrothermal processing, and direct liquefaction (Xiu and Shahbazi 2012), is a thermochemical process that allows the conversion of biomass to liquids, generally carried out in the absence of oxygen and in the presence of a solvent, most of the times water. The fact that water is both solvent and ...
WEBFeb 15, 2024 · In our previous study [14], [22], a staged conversion technology was proposed for the characteristics of lowrank coal. The asphaltene separated from the first stage reaction was hard to hydrocrack and need to be converted under strong alytic conditions, which was the key to improve the liquefaction efficiency of the whole process.
WEBJan 12, 1998 · A previous paper has shown that direct coal liquefaction in the absence of a alyst consists of two distinct stages which are readily distinguishable with an appropriate short contact time liquefaction reactor and thermogravimetric analysis. The first stage, an extraction of liquefaction solventsoluble material in the coal, is very .
WEBAug 8, 2023 · In recent years, several researchers have studied various process types for the conversion of biomass. Different processes, such as thermochemical and biochemical, have been used to convert biomass into valuable forms of energy . The conversion technology option is dependent on the amount of property, the type of .
WEBApr 29, 2024 · Biomass hydrothermal liquefaction (HTL) is a conversion technology that utilizes hightemperature and highpressure hydrothermal conditions to convert biomass into liquid fuels and chemicals. This review introduces all aspects of biomass HTL from system process parameters to reaction mechanism pathways and product control .
WEBNov 29, 2017 · Coal. Direct coal liquefaction (DCL) and indirect coal liquefaction (ICL) are the two prominent processes for coaltomethanol conversion. DCL primarily involves thermal breaking of the polymeric coal structure at elevated temperatures with subsequent hydrogenation of the fragments to generate lighter molecules.
© DZCrusher - كل الحقوق محفوظة
