The paper presents an energy performance assessment of CO2 removal for crude synthetic natural gas （SNG） upgrade by Selexol absorption process. A simplified process simulation of the Selexol process concerning power...The paper presents an energy performance assessment of CO2 removal for crude synthetic natural gas （SNG） upgrade by Selexol absorption process. A simplified process simulation of the Selexol process concerning power requirement and separation performance was developed. The assessment indicates that less pressure difference between crude SNG and absorption pressure favors the energy performance of CO2 removal process. When both crude SNG and absorption pressures are 20 bar, CO2 removal process has the best energy performance. The optimal specific power consumption of the CO2 removal process is 566 kJ/kgCO2. The sensitivity analysis shows that the CO2 removal efficiency would significantly influence the total power consumption of the removal process, as well as higher heating value （HHV） and CO2 content in SNG. However, the specific power consumption excluding crude SNG and SNG compressions changes little with the variance of CO2 removal efficiency. If by-product CO2 is compressed for CO2 capture, the process would turn into a CO2-sink for the atmosphere. Correspondingly, an increase of 281 kJ/kgCO2 in specific power consumption is required for compressing the separated CO2.展开更多
Dalian Institute of Chemical Physics （DICP） /Chinese Academy of Sciences （CAS） and Elsevier have concluded a publishing agreement for the Journa/of Natural Gas Chemistry （JNGC） on June 07, 2005. Beginning from 2...Dalian Institute of Chemical Physics （DICP） /Chinese Academy of Sciences （CAS） and Elsevier have concluded a publishing agreement for the Journa/of Natural Gas Chemistry （JNGC） on June 07, 2005. Beginning from 2006, Elsevier will publish JNGC on ScienceDirect, the online full text and bibliographic information resource, and take care of JNGC＇s international institutional print subscriptions. JNGC will also be covered in Elsevier＇s EI Compendex.展开更多
Dalian Institute of Chemical Physics (DICP) /Chinese Academy of Sciences (CAS) and Elsevier have concluded a publishing agreement for the Journal of Natural Gas Chemistry (JNGC) on June 07, 2005. Beginning from 2006, ...Dalian Institute of Chemical Physics (DICP) /Chinese Academy of Sciences (CAS) and Elsevier have concluded a publishing agreement for the Journal of Natural Gas Chemistry (JNGC) on June 07, 2005. Beginning from 2006, Elsevier will publish JNGC on ScienceDirect, the online full text and bibliographic information resource, and take care of JNGC’s international institutional print subscriptions. JNGC will also be covered in Elsevier’s EI Compendex.展开更多
Dalian Institute of Chemical Physics （DICP）/Chinese Academy of Sciences （CAS） and Elsevier have concluded a publishing agreement for the Journal of Natural Gas Chemistry （JNGC） on June 07, 2005. Beginning from 2...Dalian Institute of Chemical Physics （DICP）/Chinese Academy of Sciences （CAS） and Elsevier have concluded a publishing agreement for the Journal of Natural Gas Chemistry （JNGC） on June 07, 2005. Beginning from 2006, Elsevier will publish JNGC on ScienceDirect, the online full text and bibliographic information resource, and take care of JNGC＇s international institutional print subscriptions. JNGC will also be covered in Elsevier＇s EI Compendex.展开更多
Systematic analyses of the formation water and natural gas geochemistry in the Central Uplift of the Tarim Basin （CUTB） show that gas invasion at the late stage is accompanied by an increase of the contents of HeS a...Systematic analyses of the formation water and natural gas geochemistry in the Central Uplift of the Tarim Basin （CUTB） show that gas invasion at the late stage is accompanied by an increase of the contents of HeS and CO2 in natural gas, by the forming of the high total dissolved solids formation water, by an increase of the content of HCO3^-, relative to Cl^-, by an increase of the 2nd family ions （Ca^2＋, Mg^2＋, Sr^2＋ and Ba^2＋） and by a decrease of the content of SO4^2-, relative to Cl^-. The above phenomena can be explained only by way of thermochemicai sulfate reduction （TSR）. TSR often occurs in the transition zone of oil and water and is often described in the following reaction formula： ∑CH＋CaSO4＋H-2O→H2S＋CO2＋CaCO3. （1） Dissolved SO4^2- in the formation water is consumed in the above reaction, when HeS and CO2 are generated, resulting in a decrease of SO4^2- in the formation water and an increase of both HeS and CO2 in the natural gas. If formation water exists, the generated CO2 will go on reacting with the carbonate to form bicarbonate, which can be dissolved in the formation water, thus resulting in the enrichment of Ca^2＋ and HCO3^-. The above reaction can be described by the following equation： CO2＋HeO＋CaCO3→Ca^2＋＋2HCO3^-. The stratigraphic temperatures of the Cambrian and lower Ordovician in CUTB exceeded 120℃, which is the minimum for TSR to occur. At the same time, dolomitization, which might be a direct result of TSR, has been found in both the Cambrian and the lower Ordovician. The above evidence indicates that TSR is in an active reaction, providing a novel way to reevaluate the exploration potentials of natural gas in this district.展开更多
The＂SCI impact factor＂of Journal of Natural Gas Chemistry（JNGC）is 1.345,according to the＂2010 Journal Citation Reports（JCR）Science Edition＂.Since 2007,JNGC has been included in the Science Citation Index Expan...The＂SCI impact factor＂of Journal of Natural Gas Chemistry（JNGC）is 1.345,according to the＂2010 Journal Citation Reports（JCR）Science Edition＂.Since 2007,JNGC has been included in the Science Citation Index Expanded（SCI-E）,the Chemistry Citation Index and the Journal Citation Reports/Science Edition,all published by Thomson Scientific,and this is the second time that an impact factor has been assessed for JNGC by the Journal Citation Reports.展开更多
Because Elsevier takes care of JNGC＇s international institutional print subscriptions beginning from 2006,please visit the following website of Elsevier for the international Institutional orders.
Because Elsevier takes care of JNGC’s international institutional print subscriptions beginning from 2006,please visit the following website of Elsevier for the international Institutional orders.http://www.elsevier....Because Elsevier takes care of JNGC’s international institutional print subscriptions beginning from 2006,please visit the following website of Elsevier for the international Institutional orders.http://www.elsevier.com/locate/jngc展开更多
基金supported by the Special Fund for Major State Basic Research Projects of China(2010CB732206)
文摘The paper presents an energy performance assessment of CO2 removal for crude synthetic natural gas （SNG） upgrade by Selexol absorption process. A simplified process simulation of the Selexol process concerning power requirement and separation performance was developed. The assessment indicates that less pressure difference between crude SNG and absorption pressure favors the energy performance of CO2 removal process. When both crude SNG and absorption pressures are 20 bar, CO2 removal process has the best energy performance. The optimal specific power consumption of the CO2 removal process is 566 kJ/kgCO2. The sensitivity analysis shows that the CO2 removal efficiency would significantly influence the total power consumption of the removal process, as well as higher heating value （HHV） and CO2 content in SNG. However, the specific power consumption excluding crude SNG and SNG compressions changes little with the variance of CO2 removal efficiency. If by-product CO2 is compressed for CO2 capture, the process would turn into a CO2-sink for the atmosphere. Correspondingly, an increase of 281 kJ/kgCO2 in specific power consumption is required for compressing the separated CO2.
文摘Dalian Institute of Chemical Physics （DICP） /Chinese Academy of Sciences （CAS） and Elsevier have concluded a publishing agreement for the Journa/of Natural Gas Chemistry （JNGC） on June 07, 2005. Beginning from 2006, Elsevier will publish JNGC on ScienceDirect, the online full text and bibliographic information resource, and take care of JNGC＇s international institutional print subscriptions. JNGC will also be covered in Elsevier＇s EI Compendex.
文摘Dalian Institute of Chemical Physics (DICP) /Chinese Academy of Sciences (CAS) and Elsevier have concluded a publishing agreement for the Journal of Natural Gas Chemistry (JNGC) on June 07, 2005. Beginning from 2006, Elsevier will publish JNGC on ScienceDirect, the online full text and bibliographic information resource, and take care of JNGC’s international institutional print subscriptions. JNGC will also be covered in Elsevier’s EI Compendex.
文摘Dalian Institute of Chemical Physics （DICP）/Chinese Academy of Sciences （CAS） and Elsevier have concluded a publishing agreement for the Journal of Natural Gas Chemistry （JNGC） on June 07, 2005. Beginning from 2006, Elsevier will publish JNGC on ScienceDirect, the online full text and bibliographic information resource, and take care of JNGC＇s international institutional print subscriptions. JNGC will also be covered in Elsevier＇s EI Compendex.
基金supported by the State 973 Project(Grant No.2006CB202308)the National Natural Science Foundation of China(Grant No.40872097)
文摘Systematic analyses of the formation water and natural gas geochemistry in the Central Uplift of the Tarim Basin （CUTB） show that gas invasion at the late stage is accompanied by an increase of the contents of HeS and CO2 in natural gas, by the forming of the high total dissolved solids formation water, by an increase of the content of HCO3^-, relative to Cl^-, by an increase of the 2nd family ions （Ca^2＋, Mg^2＋, Sr^2＋ and Ba^2＋） and by a decrease of the content of SO4^2-, relative to Cl^-. The above phenomena can be explained only by way of thermochemicai sulfate reduction （TSR）. TSR often occurs in the transition zone of oil and water and is often described in the following reaction formula： ∑CH＋CaSO4＋H-2O→H2S＋CO2＋CaCO3. （1） Dissolved SO4^2- in the formation water is consumed in the above reaction, when HeS and CO2 are generated, resulting in a decrease of SO4^2- in the formation water and an increase of both HeS and CO2 in the natural gas. If formation water exists, the generated CO2 will go on reacting with the carbonate to form bicarbonate, which can be dissolved in the formation water, thus resulting in the enrichment of Ca^2＋ and HCO3^-. The above reaction can be described by the following equation： CO2＋HeO＋CaCO3→Ca^2＋＋2HCO3^-. The stratigraphic temperatures of the Cambrian and lower Ordovician in CUTB exceeded 120℃, which is the minimum for TSR to occur. At the same time, dolomitization, which might be a direct result of TSR, has been found in both the Cambrian and the lower Ordovician. The above evidence indicates that TSR is in an active reaction, providing a novel way to reevaluate the exploration potentials of natural gas in this district.
文摘The＂SCI impact factor＂of Journal of Natural Gas Chemistry（JNGC）is 1.345,according to the＂2010 Journal Citation Reports（JCR）Science Edition＂.Since 2007,JNGC has been included in the Science Citation Index Expanded（SCI-E）,the Chemistry Citation Index and the Journal Citation Reports/Science Edition,all published by Thomson Scientific,and this is the second time that an impact factor has been assessed for JNGC by the Journal Citation Reports.
文摘Because Elsevier takes care of JNGC＇s international institutional print subscriptions beginning from 2006,please visit the following website of Elsevier for the international Institutional orders.
文摘Because Elsevier takes care of JNGC’s international institutional print subscriptions beginning from 2006,please visit the following website of Elsevier for the international Institutional orders.http://www.elsevier.com/locate/jngc
