Using Isothermal Adsorption/Desorption System Model IS-100 and Electrohydraulic Servo Rock System Model MTS815 as the main apparatuses and collecting samples from the major coal reservoirs in the south of Qinshui Basi...Using Isothermal Adsorption/Desorption System Model IS-100 and Electrohydraulic Servo Rock System Model MTS815 as the main apparatuses and collecting samples from the major coal reservoirs in the south of Qinshui Basin, a hot point region of coalbed methane exploration, the paper carries out systematical comparisons of the isothermal adsorption experimental data for injection water coal samples, equilibrium moisture samples and dry coal samples, probes and establishes an experimental method of injection water coal sample preparation and isothermal experiment to simulate real reservoir conditions, and then summaries the experimental regulations and discusses the mechanism of liquid water influencing coal methane adsorption. Results of the experiment indicate that: The Langmuir volume of injection water coal samples is notably larger than that of equilibrium moisture samples, as well as larger than or equivalent to that of dry coal samples; the Langmuir pressure of injection water coal samples is the highest, the next is equilibrium moisture samples, while the dry samples is the lowest, of which the experimental results of injection water samples to simulate real reservoir conditions are more close to the fact. Under the conditions of in-position reservoirs, liquid water in coals has evident influence on methane adsorption ability of coal matrix, which can increase the adsorbability of coal and make the adsorption regulation fit to Langmuir model better. Its major reason is the increase of wetting coal matrix adsorbability. The above experimental results overthrow the conventional cognition that liquid water has no influence on coalbed methane adsorption, which may lead to an improvement of the coalbed methane isothermal adsorption experimental method and of the reliability of coalbed methane resource evaluation and prediction.展开更多
Dear Editor,African swine fever virus(ASFV),the sole member of the family Asfarviridae,is the causative agent of African swine fever(ASF),a viral disease that leads to high mortality in domestic pigs.Since firstly ide...Dear Editor,African swine fever virus(ASFV),the sole member of the family Asfarviridae,is the causative agent of African swine fever(ASF),a viral disease that leads to high mortality in domestic pigs.Since firstly identified in Kenya in the 1920s,ASFV has been prevalent in Africa,Europe,and Russian Federation(Sanchez et al.,2019).Recently,ASFV was introduced to Asian countries including China,Mongolia,Vietnam,Cambodia,Laos and South Korea,which lead to huge economic losses to local pig industries(Li and Tian,2018;Gaudreault and Richt,2019).The first case of ASFV in China was reported in August 2018(Zhou et al.,2018).展开更多
Dear Editor,Theworld had suffered pandemics of COVID-19 caused by SARS-CoV-2.At the time ofwriting,COVID-19 is still widely spreading inmany countries and regions,and by June 14,2022,totally 532,887,351 cases,includin...Dear Editor,Theworld had suffered pandemics of COVID-19 caused by SARS-CoV-2.At the time ofwriting,COVID-19 is still widely spreading inmany countries and regions,and by June 14,2022,totally 532,887,351 cases,including 6,307,021 deaths,were reported globally(WHO,https://covid19.who.int/table).Powerful measures,such as prophylactic and therapeutic interventions against the virus,are in urgent need for COVID-19 control and prevention.The spike protein,which is expressed on the virus surface,is the key determinant of viral-host interaction(Ng et al.,2021)and mediates the virus entry.展开更多
文摘Using Isothermal Adsorption/Desorption System Model IS-100 and Electrohydraulic Servo Rock System Model MTS815 as the main apparatuses and collecting samples from the major coal reservoirs in the south of Qinshui Basin, a hot point region of coalbed methane exploration, the paper carries out systematical comparisons of the isothermal adsorption experimental data for injection water coal samples, equilibrium moisture samples and dry coal samples, probes and establishes an experimental method of injection water coal sample preparation and isothermal experiment to simulate real reservoir conditions, and then summaries the experimental regulations and discusses the mechanism of liquid water influencing coal methane adsorption. Results of the experiment indicate that: The Langmuir volume of injection water coal samples is notably larger than that of equilibrium moisture samples, as well as larger than or equivalent to that of dry coal samples; the Langmuir pressure of injection water coal samples is the highest, the next is equilibrium moisture samples, while the dry samples is the lowest, of which the experimental results of injection water samples to simulate real reservoir conditions are more close to the fact. Under the conditions of in-position reservoirs, liquid water in coals has evident influence on methane adsorption ability of coal matrix, which can increase the adsorbability of coal and make the adsorption regulation fit to Langmuir model better. Its major reason is the increase of wetting coal matrix adsorbability. The above experimental results overthrow the conventional cognition that liquid water has no influence on coalbed methane adsorption, which may lead to an improvement of the coalbed methane isothermal adsorption experimental method and of the reliability of coalbed methane resource evaluation and prediction.
基金supported by Luoyang Major Science and Technology Project(1901029A)partially supported by Jiangsu Agricultural Science and Technology Independent Innovation Fund Project[CX(21)2035]Jiangsu Provincial Key R&D plan(BE2020398).
文摘Dear Editor,African swine fever virus(ASFV),the sole member of the family Asfarviridae,is the causative agent of African swine fever(ASF),a viral disease that leads to high mortality in domestic pigs.Since firstly identified in Kenya in the 1920s,ASFV has been prevalent in Africa,Europe,and Russian Federation(Sanchez et al.,2019).Recently,ASFV was introduced to Asian countries including China,Mongolia,Vietnam,Cambodia,Laos and South Korea,which lead to huge economic losses to local pig industries(Li and Tian,2018;Gaudreault and Richt,2019).The first case of ASFV in China was reported in August 2018(Zhou et al.,2018).
基金supported by the National Key R&D Program of China(grant number 2020YFC0842600)the National Natural Science Foundation of China (grant numbers 82041038 and 31730029)
文摘Dear Editor,Theworld had suffered pandemics of COVID-19 caused by SARS-CoV-2.At the time ofwriting,COVID-19 is still widely spreading inmany countries and regions,and by June 14,2022,totally 532,887,351 cases,including 6,307,021 deaths,were reported globally(WHO,https://covid19.who.int/table).Powerful measures,such as prophylactic and therapeutic interventions against the virus,are in urgent need for COVID-19 control and prevention.The spike protein,which is expressed on the virus surface,is the key determinant of viral-host interaction(Ng et al.,2021)and mediates the virus entry.
