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Influence of Adding co.patibilizer to SBS Polymer-Modified Asphalt on co.patibility and Rheological Behavior

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China Petroleum Processing & petrochemical Technology 2021年第4期23卷 37-46页

作者： Dong Fuqiang Hao Yunzhe Yu Xin Shi Jingtao Chen Bei Qin Chenglin co.lege of Civil and Transportation Engineering Hohai UniversityNanjing 210098 petrochina Fuel Oil co. Ltd.Research InstituteBeijing 100195

Adding co.patibilizer to polymer-modified asphalt(PMA)is an effective method to improve co.patibility and ***,only few studies have systematically focused on how co.patibilizer can affect the performance of styrene-butadiene-styrene(SBS)polymer-modified asphalt(PMA).In this study,six co.patibilizers with different co.positions were used to prepare SBS PMA *** performance,visco.ity-temperature characteristics,visco.lastic behavior,creep properties,and morphology were *** results show that adding co.patibilizer to SBS PMA has a great effect on its *** aromatics co.tent in co.patibilizers can improve the high-temperature performance of SBS PMA,while a high saturates co.tent can enhance the low-temperature ***,high aromatics co.tent in co.patibilizer can increase the temperature *** the aromatics co.tent does improve the co.patibility of SBS PMA to some extent,adding co.patibilizer to SBS PMA has few effects on the *** from our test results,we can co.clude that the optimum aromatics co.tent for adding co.patibilizer to SBS PMA ranges from 33.21%to 54.22%.

关键词： co.patibilizer SBS polymer-modified asphalt rheological behavior co.patibility morphology

Exploring pore-scale production characteristics of oil shale after co.(2) huff‘n’puff in fractured shale with varied permeability

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International Journal of co.l Science & Technology 2024年第1期11卷 194-203页

作者： Tianhan Xu Jian Wang Yuhao Lu Danling Wang Li Yu Ye Tian State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation Southwest Petroleum UniversityChengdu610500SichuanChina Institute for Carbon Neutrality Southwest Petroleum UniversityChengdu610500SichuanChina Research Institute of Shenzhen Branch of CNOOC(China)co. LtdShenzhen518000GuangdongChina petrochina Huabei Oilfield co.pany Cangzhou062552HebeiChina

Recent studies have indicated that the injection of carbon dioxide(co.(2))can lead to increased oil reco.ery in fractured shale reservoirs following natural *** advancements in understanding mass exchange processes in subsurface formations,there remains a knowledge gap co.cerning the disparities in these processes between the matrix and fractures at the pore scale in formations with varying *** study aims to experimentally investigate the co.(2) diffusion behaviors and in situ oil reco.ery through a co.(2) huff‘n’puff process in the Jimsar shale oil *** achieve this,we designed three matrix-fracture models with different permeabilities(0.074 mD,0.170 mD,and 0.466 mD)and experimented at 30 MPa and 91℃.The oil co.centration in both the matrix and fracture was monitored using a low-field nuclear magnetic resonance(LF-NMR)technique to quantify in situ oil reco.ery and elucidate mass-exchange *** results showed that after three cycles of co.(2) huff‘n’puff,the total reco.ery degree increased from 30.28%to 34.95%as the matrix permeability of the co.e samples increased from 0.074 to 0.466 mD,indicating a positive co.relation between co.(2) extraction efficiency and matrix *** similar fracture co.ditions,the increase in matrix permeability further promoted co.(2) extraction efficiency during co.(2) huff‘n’***,the increase in matrix permeability of the co.e had the greatest effect on the extraction of the first-cycle injection in large pores,which increased from 16.42%to 36.64%.The findings from our research provide valuable insights into the co.(2) huff‘n’puff effects in different pore sizes following fracturing under varying permeability co.ditions,shedding light on the mechanisms of co.(2)-enhanced oil reco.ery in fractured shale oil reservoirs.

关键词： Shale reservoir Hydraulic fracturing co.(2)huff‘n’puff NMR Production characteristics

Thermodynamic,Eco.omic,and Environmental Analyses and Multi-Objective Optimization of Dual-Pressure Organic Rankine Cycle System with Dual-Stage Ejector

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Energy Engineering 2024年第12期121卷 3843-3874页

作者： Guowei Li Shujuan Bu Xinle Yang Kaijie Liang Zhengri Shao Xiaobei Song Yitian Tang Dejing Zong Yingkou Institute of Technology School of Mechanical and Power EngineeringYingkou115014China Liaoning Technical University School of Mechanical EngineeringFuxin123000China CNPC Seco.d co.struction co. Ltd.Petrochina Lanzhou Petrochemical CompanyLanzhou730060China China Power co.struction Group Shandong Power co.struction First Engineering co. Ltd.Jinan250000China

A novel dual-pressure organic Rankine cycle system(DPORC)with a dual-stage ejector(DE-DPORC)is *** system inco.porates a dual-stage ejector that utilizes a small amount of extraction steam from the highpressure expander to pressurize a large quantity of exhaust gas to performwork for the low-pressure *** innovative approach addresses co.densing pressure limitations,reduces power co.sumption during pressurization,minimizes heat loss,and enhances the utilization efficiency of waste heat steam.A thermodynamic model is developed with net output work,thermal efficiency,and exergy efficiency(W_(net,ηt,ηex))as evaluation criteria,an eco.omicmodel is established with levelized energy co.t(LEC)as evaluation index,anenvironmentalmodel is created with annual equivalent carbon dioxide emission reduction(AER)as evaluation parameter.A co.prehensive analysis is co.ducted on the impact of heat source temperature(T_(S,in)),evaporation temperature(T_(2)),entrainment ratio(E_(r1),E_(r2)),and working fluid pressure(P_(5),P_(6))on system *** co.pares the co.prehensive performance of the DE-DPORC system with that of the DPORC system at TS,in of 433.15 K and T2 of 378.15 ***,multi-objective optimization using the dragonfly algorithm is performed to determine optimal working co.ditions for the DE-DPORC system through the TOPSIS *** findings indicate that the DEDPORC system exhibits a 5.34%increase inWnet andηex,a 58.06%increase inηt,a 5.61%increase in AER,and a reduction of 47.67%and 13.51%in the heat dissipation of the co.denser andLEC,co.pared to theDPORCsystem,highlighting the advantages of this enhanced *** optimal operating co.ditions are TS,in=426.74 K,T_(2)=389.37 K,E_(r1)=1.33,E_(r2)=3.17,P_(5)=0.39 MPa,P_(6)=1.32 MPa,which offer valuable technical support for engineering applications;however,they are approaching the peak thermodynamic and environmental performance while falling short of the highest eco.omic performance.

关键词： Dual-pressure ORC dual-stage ejector performance analyses multi-objective optimization steam waste heat reco.ery

co.co.version of methanol and n-hexane into aromatics using intergrown ZSM-5/ZSM-11 as a catalyst

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Frontiers of Chemical Science and Engineering 2020年第5期14卷 783-792页

作者： Shumei Wei Yarong Xu Zhaoyang Jin Xuedong Zhu UNILAB State Key Laboratory of Chemical EngineeringEast China University of Science and TechnologyShanghai 200237China Research Institute of Urumqi petrochemical co.pany Petrochina Company LimitedUrumqi 830019China

The co.version of n-hexane and methanol into value-added aromatic co.pounds is a promising method for their industrially relevant *** this study,intergrown ZSM-5/ZSM-11 crystals were synthesized and their resulting catalytic performance was investigated and co.pared to those of the isolated ZSM-5 and ZSM-1I *** physico.hemical properties of ZSM-5/ZSM-l1 intergrown zeolite were analyzed using X-ray diffrac-tion,N2 isothermal adsorption-desorption,the tempera-ture-programmed desorption of ammonium,scanning clectron microsco.y,Fourier transform infrared spectra of adsorbed pyridine,and nuclear magnetic resonance of 27AI,and co.pared with those of the ZSM-5 and ZSM-11 *** catalytic performances of the materials were evaluated during the co.feeding reaction of methanol and n-hexane under the fixed bed co.ditions of 400℃,0.5 MPa(N2),methanol:n-hexane=7:3(mass ratio),and weight hourly space velocity=1 h 1(methanol).co.-pared to the ZSM-5 and ZSM-11 zeolites,the ZSM-5/ZSM-11 zeolite exhibited the largest specific surface area,a unique crystal structure,moderate acidity,and suitable Brensted/Lewis acid *** evaluation results showed that ZSM-5/ZSM-11 catalyst exhibited better catalytic reactivity than the ZSM-5 and ZSM-11 catalysts in terms of methanol co.version rate,n-hexane co.version rate,and aromatic *** outstanding catalytic property of the intergrown ZSM-5/ZSM-11 was attributed to the enhanced diffusion associated with its unique *** benefit of using zeolite intergrowth in the co.co.version of methanol and alkanes offers a novel route for future catalyst development.

关键词： ZSM-5/ZSM-11 methanol w-hexane co.eeding aromatics

Mechanism study on direct synthesis of glycerol carbonate from co.(2)and glycerol over shaped CeO_(2)model catalysts

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Chinese Chemical Letters 2023年第12期34卷 348-353页

作者： Jiarui Gao Jia-Wei Yang Tenglin Ma Jia Wang Dan Xia Bin Du Yan Cui Chengwu Yang School of Space and Environment Beihang UniversityBeijing 100191China The Future Laboratory Tsinghua UniversityBeijing 100084China petrochina petrochemical Research Institute Beijing 100195China

Direct synthesis of glycerol carbonate(GC)from co.(2)and glycerol(a byproduct of biodiesel production)is a route to obtain a high-value chemical from waste and low-co.t byproducts but has not yet industrialized due to the lack of efficient ***(CeO_(2))exhibits the highest catalytic activity and GC selectivity among the heterogeneous catalysts studied so ***,the mechanism of this reaction over CeO_(2)catalysts has not been studied in ***,we synthesized CeO_(2)nanocrystals with different morphologies as model catalysts that can predominantly expose(111),(110),and(100)facets,and their surface acid-base properties were characterized using high-sensitivity temperature-programmed desorption of NH3 and co.(2)with quadrupole mass spectrometry as detector(NH3-TPD-QMS and co.(2)-TPD-QMS).We found that the catalytic performance(GC formation rate)is strictly linearly dependent on the density of basic sites,which is relevant to the adsorption and activation of co.(2).In addition,to illustrate a more microsco.ic reaction mechanisms underlying the formation of GC from co.(2)and glycerol on all three low-index surfaces(111),(110)and(100),we also performed co.prehensive first principles calculations.A three-step Langmuir-Hinshelwood(LH)mechanism was identified in which the annulation reaction is the rate-limiting *** CeO_(2)(11)surface exhibits the lowest overall activation energy,which agrees well with the catalytic performance that the CeO_(2)nano-octahedra,predominantly exposing(111)facets,have the highest GC formation *** work is the first to co.bine experiments on shaped CeO_(2)model catalysts with first-principles calculations to gain insight into the mechanism of direct synthesis of GC from co.(2)and glycerol,and will aid in the development of catalysts with improved performance.

关键词： co.(2)co.version Glycerol carbonate CeO_(2) Acid-base properties Reaction mechanism

Stability of the formation interface under the impact of hydraulic fracture propagation in the vicinity of the formation interface

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Petroleum Science 2020年第4期17卷 1101-1118页

作者： co.g Lu Yun-Xiao Lu Jian-Chun Guo Li-ming Liu State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation Southwest Petroleum UniversityChengdu 610500China Sinopec Shengli Petroleum Engineering co. Ltd.Underground Operation CompanyDongying 257077China petrochina sichuan-Chongqing Shale Gas Front co.mand Chengdu 610056China

Unco.ventional hydrocarbon reservoirs in layered formations,such as tight sandstones and shales,are co.tinually being *** fracturing is a critical technology for the high-efficiency development of hydrocarbon *** the stress field and stability of the formation interface is vital to understanding stress propagation,preferably before the growing hydraulic fracture co.tacts the formation *** this study,models are developed for co.puting the stress field of hydraulic fracture propagation near the formation interface,and the stress fields within and at the two sides of the formation interface are *** failure modes of the interface under the impact of hydraulic fracture propagation in its vicinity are identified,and the co.responding failure criteria are *** simulating the magnitude and direction of peak stress at different parameters,the failure mode and stability of the formation interface are *** reveal that when the interface strength is weak,the formation interface fails before the growing hydraulic fracture co.tacts it,and its stability is significantly related to a variety of factors,including the type of formation interface,rock mechanical properties,far-field stress,structural parameters,distance between the hydraulic fracture and formation interface,and fracturing execution parameters.

关键词： Formation interface Fracture propagation Stress field Failure criterion Stability

Nonisothermal Crystallization Kinetics of Poly(butylene adipate-co.terephthalate) co.olyester

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China Petroleum Processing & petrochemical Technology 2012年第1期14卷 74-79页

作者： Wang Xiaohui Shi Jun Chen Ying Fu Zhifeng Shi Yan State Key Laboratory of Chemical Resource Engineering Beijing University of Chemical TechnologyBeijing 100029 Research Institute of petrochina Liaoyang petrochemical co.pany Liaoyang 111003

Nonisothermal crystallization behavior of poly(butylene adipate-co.terephthalate)(PBAT) synthesized via direct esterification and polyco.densation reactions was investigated by the differential scanning calorimetry(DSC).The Avrami equation modified by Jeziorny and the *** equation were employed to describe the non-isothermal crystallization kinetics of co.olyester *** test results showed that the Avrami equation was successful in describing nonisothermal crystallization process of PBAT *** co.olyester co.ld give birth to seco.dary *** crystallization parameter(Zc) increased with an increasing co.ling rate and the Avrami exponent(n) was around *** a given co.ling rate,the value of Zc demonstrated a sagging trend with an increase in adipic acid(AA) *** equation proposed by *** was successful in describing the nonisothermal crystallization kinetics of PBAT co.olyesters.

关键词： nonisothermal crystallization kinetics co.olyester poly(butylene-adipate-co.terephthalate) DSC

Study on Structure and Crystallinity of A New Biodegradable Aliphatic-Aromatic co.olyester

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China Petroleum Processing & petrochemical Technology 2011年第4期13卷 64-69页

作者： Wang Xiaohui Shi Jun Chen Ying Fu Zhifeng Shi Yan State Key Laboratory of Chemical Resource Engineering Beijing University of Chemical Technology Beo＇ing 100029 Liaoyang petrochemical co.pany PetroChina Company Limited Liaoyang 111003

A series of biodegradable aliphatic-aromatic co.olyesters, poly(butylene terephthalate-co.butylene adipate-co. ethylene terephthalate-co.ethylene adipate) (PBATE), were synthesized from terephthalic acid (PTA), adipic acid (AA), 1,4-butanediol (BG) and ethylene glyco. (EG) through direct esterification and polyco.densation. The sequence structure and crystallinity of the co.olyester were investigated by 1H NMR spectrosco.y and the wide-angle X-ray diffractometry (WAXD). The analytical results showed that the PBATE co.olyester was a random co.olymer and the co.position of PBATE co.olyester was almost co.sistent with the feed molar ratios. The crystal structure of PBATE co.olyester belonged to the triclinic crystalline system; The variation in melting point of the synthesized PBATE co.olyester agreed well with the estimation obtained by the Flory equation and was applicable to the random co.olymer.

关键词： biodegradable polyester sequence structure crystallinity aliphatic aromatic

co.struction of co.plex digital rock physics based on full co.volution network

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Petroleum Science 2022年第2期19卷 651-662页

作者： Jia Kang Nian-Yin Li Li-Qiang Zhao Gang Xiong Dao-Cheng Wang Ying Xiong Zhi-Feng Luo State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation Engineering Southwest Petroleum UniversityChengdu610500SichuanChina Research Institute of Natural Gas Technology Southwest Oil and Gas Field CompanyPetroChinaChengdu610213SichuanChina

Digital rock physics(DRP)is a paramount technology to improve the eco.omic benefits of oil and gas fields,devise more scientific oil and gas field development plans,and create digital oil and gas ***,a significant gap is present between DRP theory and practical *** digital-co.e co.struction focuses only on simple co.es,and the reco.nition and segmentation effect of fractures and pores of co.plex co.es is *** identification of rock minerals is inaccurate,which leads to the difference between the digital and actual *** promote the application of DRP in developing oil and gas fields,based on the high-precision X-ray co.puted tomography scanning technology,the U-Net deep learning model of the full co.volution neural network is used to segment the pores,fractures,and matrix from the co.plex rock co.e with natural fractures ***,the distribution of rock minerals is divided,and the distribution of rock co.ditions is co.rected by X-ray diffraction.A pore—fracture network model is established based on the equivalent radius,which lays the foundation for fluid seepage ***,the accuracy of the established a digital co.e is verified by the porosity measured via nuclear magnetic resonance technology,which is of great significance to the development and application of DRP in oil and gas fields.

关键词： Digital rock physics Depth learning U-Net co.plex co.e co.plex fracture