Extractive Desulfurization from Simulated Sulfur-Rich Naphtha

Upon extractive desulfurization of sulfur-rich oil obtained after recycling raffinate,the effects of single and compound extractants,temperature,and extractant/oil ratio on desulfurization rate,oil loss rate,extractant loss rate,and selectivity coefficient were investigated.The results showed that the thiophene existing in the simulated sulfur-rich oil could be further removed by extraction.The single-stage desulfurization rates achieved by dimethyl sulfoxide(DMSO)and sulfolane(SF)were 53.51%and 47.36%,respectively,while the selectivity coefficient of SF was 1.13,which was higher than that of DMSO(with a selectivity coefficient of 1.04).For the compound extractant,a single-stage desulfurization rate of 49.59%and a selectivity coefficient of 1.40 were obtained by using DMSO+10%MEA as the extractant,which was higher than that of SF.Upon using 50%SF+50%DMSO as the extractant,the single-stage desulfurization rate reached 50.92%with a selectivity coefficient of 1.32.Based on the comprehensive consideration,the DMSO+10%MEA extractant was selected as the best extractant for treating the sulfur-rich oil.

A semi-immobilized sulfur-rich copolymer backbone with conciliatory polymer skeleton and conductive substrates for high-performance Li-S batteries

Sulfur-rich polymers have gained a great deal of attention as the next-generation active materials in lithium-sulfur(Li-S)batteries due to their low cost,environmental compatibility,naturally sulfur uniform dispersion,and distinctive structure covalently bonding with sulfur atoms.However,the poor electrical conductivity and undesirable additional shuttle effect still hinder the commercial application of sulfur-rich polymers.Herein,we report a flexible semi-immobilization strategy to prepare allylterminated hyperbranched poly(ethyleneimine)-functionalized reduced graphene oxide(A-PEI-EGO)as sulfur-rich copolymer backbone.The semi-immobilization strategy can effectively reconcile the demand for polymer skeleton and conductive substrates through forming quaternary ammonium groups and reducing oxygen-containing functional groups,resulting in enhanced skeleton adsorption capacity and substrate electronic conductivity,respectively.Furthermore,the stable covalent bonding connection based on polymer molecules(A-PEI)not only completely prevents the additional shuttle effect of lithiation organic molecules and even sulfur-rich oligomers,but provides more inverse vulcanization active sites.As a result,the as-prepared A-PEI-EGO-S cathodes display an initial discharge capacity of1338 m A h g^(-1)at a rate of 0.1 C and an outstanding cycling stability of 0.046%capacity decay per cycle over 600 cycles.Even under 6.2 mg cm^(-2)S-loaded and sparing electrolyte of 6μL mg^(-1),the A-PEI-EGO-S cathode can also achieve a superior cycling performance of 98%capacity retention after 60 cycles,confirming its application potential.

Mineral Chemistry of REE-Rich Apatite and Sulfur-Rich Monazite from the Mushgai Khudag, Alkaline Volcanic-Plutonic Complex, South Mongolia

The Mushgai khudag volcanic-plutonic complex consists of four REE mineralization zones: carbonatite zone, apatite zone, magnetite zone, and monazite zone. REE mineralization occurs within peripheries of alkaline magmatic rocks which consist of porphyritic syenite, microsyenite and quartz syenites. Three types of LREE-rich apatite can be found in the carbonatite, apatite, and monazite zones. Crystal-1 type of apatite exists as hexagonal prismatic shape and is mostly found in the apatite zone, and in syenite. Crystal-2 type of apatite can be exposed also at the apatite zone, and carbonatite zone as brecciated massive crystalline aggregate. Crystal-3 type of apatite demonstrates the compositional zoning texture with monazite as inter-zoning, and is only found in monazite zone. The LREE-bearing apatites from the Mushgai khudag complex are mostly fluorapatite to hydroxyl-bearing fluorapatite with variable REE content. Apatites from the monazite zone present individual sulfur-rich monazite grain, and are formed by comprehensive substitutions.

Carbon isotopic compositions of mono-, di-, tri-aromatics provide insights into the source of sulfur-rich crude oils in the Huanghekou Depression, Bohai Bay Basin

The stable carbon isotope compositions (δ13C) of individual aromatic hydrocarbons have been analyzed in sulfur-rich and sulfur-lean crude oils from the Huanghekou Depression, Bohai Bay Basin. The δ13C values of individual aromatic hydrocarbons, including alkylbenzenes, alkylnaphthalenes, alkylphenanthrenes, alkylfluorenes and alkyldibenzothiophenes, are reported. The main aims are to find out the origin of these oils and their relationship to paleoclimate. The distribution of aromatic hydrocarbons and maturity parameters show the oils all stay in the low-mature to mature stage. Meanwhile, aromatic hydrocarbons are mainly derived from the diagenetic/catagenetic origin. The δ13C values for 1,2,4-trimethylbenzene (−30.7‰ to −28.8‰) and 1,2,3,4-tetramethylbenzene (−32.4‰ to −26.3‰) indicate the algae-derived organic matter for alkylbenzenes. Some isomers, such as 1,7-+1,3-+1,6-dimethylnaphthalene, 1,2,5-trimethylnaphthalene, 1,2,5,6-+1,2,3,5-tetramethylnaphthalene, 1,10-+1,3-+3,10-+3,9-dimethylphenanthrenes, 1,6-+2,9-+2,5-dimethylphenanthrenes and 4,9-+4,10-+1,9- dimethylphenanthrenes show isotopic depletion (−34.9‰ to −25.2‰), indicating the major contribution of algae for these compounds. Meanwhile, isotopically depleted (−33.6‰ to −26.7‰) alkyldibenzothiophenes represent the algae input. δ13C values for mainly algae-derived naphthalene to trimethylnaphthalenes of sulfur-rich oils are more enriched than those of sulfur-lean oil, with the most significant difference of 4.4‰, indicating that the aridity of the environment and stratified water column result in the enrichment in 13C.

Mineral Chemistry of REE-Rich Apatite and Sulfur-Rich Monazite from the Mushgai Khudag, Alkaline Volcanic-Plutonic Complex, South Mongolia

The Mushgai khudag volcanic-plutonic complex consists of four REE mineralization zones: carbonatite zone, apatite zone, magnetite zone, and monazite zone. REE mineralization occurs within peripheries of alkaline magmatic rocks which consist of porphyritic syenite, microsyenite and quartz syenites. Three types of LREE-rich apatite can be found in the carbonatite, apatite, and monazite zones. Crystal-1 type of apatite exists as hexagonal prismatic shape and is mostly found in the apatite zone, and in syenite. Crystal-2 type of apatite can be exposed also at the apatite zone, and carbonatite zone as brecciated massive crystalline aggregate. Crystal-3 type of apatite demonstrates the compositional zoning texture with monazite as inter-zoning, and is only found in monazite zone. The LREE-bearing apatites from the Mushgai khudag complex are mostly fluorapatite to hydroxyl-bearing fluorapatite with variable REE content. Apatites from the monazite zone present individual sulfur-rich monazite grain, and are formed by comprehensive substitutions.

Amplification and sequencing of a sulfur-rich 10kd prolamin gene from rice seeds

Nutritious value of seed storage protein is low due to deficiency in essential amino acid contents. Cereals are mainly deficient in lysine and legumes in sulfur-containing amino acids (methionine and cysteine). So far, several sufur-rich seed protein genes have been isolated and the essential amino acid contents of seed proteins were increased in transgenic tobacco and Brassica napus. In this paper we report the isolation and sequencing of the 10kd prolamin gene from seeds. Poly(A) RNA were prepared from the immature endosperms of japonica rice, Sachiminori, 10 d after flowering. Complementary DNAs were synthesized according to Promega Instruction Manual. Two primers were synthesized and their sequences were Primer Ⅰ: CGTCTACACCATCTGGAATC, Primer Ⅱ: GTGTTTGCAGATAGTATGC. The amplified fragraents were inserted into the Sma I site of pGEM-7zf(+) and was used to transform E. coli JM101 after PCR reaction. DNA sequence were determined by Sanger’s Chain-termination method. Synthesis of cDNA. Using mRNAs as

Biotransformation of 6:2 fluorotelomer sulfonate(6:2 FTS)in sulfur-rich media by Trametopsis cervina

Biotransformation of 6:2 fluorotelomer sulfonate(6:2 FTS)by two species of white-rot fungi,Pleurotus ostreatus(P.ostreatus)and Trametopsis cervina(T.cervina),was investigated in a sulfurrich medium designed to stimulate production of lignin-degrading enzymes.Degradation of 6:2 FTS was observed by T.cervina over the study period of 30 d,but not by P.ostreatus.Biotransformation rates were comparable to those found in other studies investigating mixed culture degradation in nonsulfur limiting media,with approximately 50 mol%of applied 6:2 FTS removed after 30 d.Stable transformation products were short-chain perfluorocarboxylic acids(PFCAs),including PFHxA(2.27 mol%),PFPeA(0.24 mol%),and PFBA(0.28 mol%).The main intermediate products include 5:2 sFTOH(16.3 mol%)and 5:3 FTCA(2.99 mol%),while 6:2 FTCA,6:2 FTuCA,and 5:2 ketone were also identified at low levels.Approximately 60 mol%of detected products were assigned to the major pathway to 5:2 ketone,and 40 mol%were assigned to the minor pathway to 5:3 FTCA.The overall molar balance was found to decrease to 75 mol%by Day 30,however,was closed to near 95 mol%with a theoretical estimation for the volatile intermediates in the headspace,5:2 ketone and 5:2 sFTOH.The different capabilities of the two white-rot fungal species for 6:2 FTS biotransformation in sulfur-rich media suggest that the enzyme processes of T.cervina to de-sulfonate 6:2 FTS may be unrelated to sulfur metabolism.

Unsaturated-sulfur-rich MoS2 nanosheets decorated on free-standing SWNT film： Synthesis, characterization and electrocatalytic application

Herein, we report a bottom-up solvothermal route to synthesize a flexible, highly efficient MoS2@SWNT electrocatalyst for hydrogen evolution reactions （HER）. Characterization revealed that branchqike MoS2 nanosheets containing sulfur- rich sites were in situ uniformly dispersed on free-standing single-walled carbon nanotube （SWNT） film, which could expose more unsaturated sulfur atoms, allowing excellent electrical contact with active sites. The flexible catalyst exhibited excellent HER performance with a low overpotential （-150 mV at 10 ma/cm2） and small Tafel slope （4l mV/dec）. To further explain the improved performance, the local electronic structure was investigated by X-ray absorption near-edge structure （XANES） analysis, proving the presence of unsaturated sulfur atoms and strong electronic coupling between MoS2 and SWNT. This study provides an in-situ synthetic route to create new multifunctional flexible hybridized catalysts and useful insights into the relationships electronic structure, and properties among the catalyst microstructure,

Molecular characterization of sulfur compounds in some special sulfur-rich Chinese crude oils by FT-ICR MS

Routine GC/MS analysis may apply to the volatilized Low-Molecular-Weight compounds in saturate and aromatic hydrocarbon fractions;thus,relative studies using this technique inevitably bring about some limitations on distribution of miscellaneous sulfur atom.In this article,Fourier Transform Ion Cyclotron Resonance Mass Spectrometry(FT-ICR MS)with high resolution is employed to investigate the distribution of organic sulfur compounds(OSCs)in the crude oil typically derived from the Eogene carbonate-evaporite sediments with further chemical compositional characterization in molecular level by miscellaneous atomic type,carbon number,and double bond equivalent(DBE).A variety of miscellaneous atomic types with S1,S2,S3,OS,OS2,O2S,O2S2,NS,and NOS etc.(S1 means those OSCs with one sulfur atom in a molecule)were identified in OSCs in these oil samples.High levels of alkyl thioether series compounds with one ring structure were presented mainly in the crude oil in the Jianghan Basin whereas high amounts of benzothiophene,dibenzothiophene etc.compounds with higher values in DBE and carbon number range occurred in the sulfur-rich heavy oil in the Jinxian Sag.Although carbonate-evaporite sediments deposited in the saline lacustrine facies in the Eogene basin both occurred in the Jinxian Sag and Jianghan Basin,obviously,they possess different chemical diagenetic pathway of sulfur under various microbial reactions,leading to diverse distributional characteristics on biomarkers,OSCs,and even different hydrocarbon generation mechanism of immature crude oil.

Pitch-derived 3D amorphous carbon encapsulated sulfur-rich cathode for aqueous Zn-S batteries

Rechargeable aqueous zinc batteries have attracted much attention due to their high security, plentiful zinc resources, and environmental friendliness. However, it can only offer limited specific capacity and energy density based on ion insertion chemistry cathode. Herein, we design a low-cost and high-energy density aqueous Zn-S battery where the conversion cathode was fabricated by pitch-derived three-dimensional(3D) amorphous carbon encapsulated industrial-grade sulfur powder. The cost of the chemical substances for this aqueous Zn-S battery might be reduced to $9.38 per kW h based on the affordable cost of the raw ingredients. It is found that the PAC/S-60.33% cathode reveals excellent electrochemical performance, including a high reversible capacity(633.5 mAh g^(-1)at 0.5 A g^(-1)), high energy density(297.5 Wh kg^(-1)), an excellent rate capability(204.5 mAh g^(-1) at 5.5 A g^(-1)), as well as good cycling stability(180 mAh g^(-1)after 400 cycles at 5.0 A g^(-1)). Besides, the reaction mechanism of the cathode was investigated using ex-situ X-ray diffraction(XRD), X-ray photoelectron spectroscopy(XPS), and transmission electron microscope(TEM). It was demonstrated that the cathode undergoes a conversion reaction between S and Zn S. Furthermore, the discoveries also offer prospective possibilities to fabricate more secure and inexpensive battery systems.

富硫废水中稳定生物单质硫效果与机制研究

为提高含硫废水同步脱氮除硫工艺中生物单质硫回收率,开展了富硫废水中稳定生物单质硫效果与机制研究。在富硫废水(S^(2-)质量浓度300 mg/L)和贫硫废水(S^(2-)质量浓度200、100 mg/L)中添加阻断剂硫代硫酸钠进行脱氮除硫实验。结果表明,富硫废水中稳定组(加30 mg/L阻断剂)在60 h时单质硫积累量达到68.79 mg/L,比未稳定组(不添加阻断剂)高25.34 mg/L,单质硫稳定率达58.31%,单质硫回收率为36.84%;而贫硫废水(S^(2-)质量浓度为200、100 mg/L)中单质硫不稳定,单质硫稳定率仅11.2%、14.14%,且回收率低(15.71%、12.39%)。可见,阻断剂在富硫废水中实现了稳定生物单质硫。此外,阻断剂有利于反硝化菌和脱氮硫杆菌增殖积累,富硫废水下高比例的脱氮硫杆菌可促进单质硫稳定。阻断剂抑制了硫代硫酸盐和硫酸盐的生成,使硝酸盐得到更多电子(稳定组比未稳定组多得19.76 mmol/L电子),促进了单质硫的生成,实现了生物单质硫稳定。该技术可为废水中生物单质硫的回收与利用提供理论基础。

富硫前驱体溶液对CuPbSbS_(3)太阳能电池光伏性能的影响研究

CuPbSbS_(3)半导体材料因具有吸收系数高、禁带宽度适中等光电特性,在太阳能电池中具有广阔应用前景。本文采用丁基二硫代氨基甲酸(BDCA)溶液法,在管式炉退火过程中沉积CuPbSbS_(3)薄膜。通过调节BDCA溶液中二硫化碳的比例,实现CuPbSbS_(3)薄膜的可控沉积。通过扫描电子显微镜、X射线衍射仪等测试技术表征CuPbSbS_(3)薄膜的形貌和晶体结构,结果表明当乙醇、正丁胺、二硫化碳体积比为7.4∶9.6∶6时,所沉积的CuPbSbS_(3)薄膜结晶形态较好。此外,构建结构为FTO/SnO_(2)/CuPbSbS_(3)/Spiro-OMeTAD/Ag的太阳能电池,测试其莫特-肖特基曲线、奈奎斯特阻抗谱、暗电流密度-电压曲线以及对称器件在暗态下的电流-电压曲线,进一步研究CuPbSbS_(3)太阳能电池的界面电荷传输动力学。电学测试结果表明,所沉积的CuPbSbS_(3)薄膜内部的缺陷复合中心密度与电荷传输电阻降低,光生载流子的非辐射复合减少,载流子输运性能提高。相应的CuPbSbS_(3)太阳能电池实现了0.81%的光电转换效率,短路电流密度为9.08 mA·cm^(-2),开路电压达到了250 mV。研究成果为高质量CuPbSbS_(3)薄膜沉积提供了实验基础。

Theory analysis and vestigial information of surface relaxation of natural chalcopyrite mineral crystal

X-ray diffraction was used to measure the unit cell parameters of chalcopyrite crystal.The results showed that the chalcopyrite crystal is perfect,and the arrangement of its atoms is regular.A qualitative analysis of molecular mechanics showed that surface relaxation causes the chalcopyrite surface to be sulfur enriched.Atomic force microscope（AFM） was used to obtain both a microscopic three-dimensional topological map of chalcopyrite surface and a two-dimensional topological map of its electron cloud.The AFM results revealed that the horizontal and longitudinal arrangements of atoms on the chalcopyrite surface change dramatically compared with those in the interior of the crystal.Longitudinal shifts occur among the copper,iron and sulfur atoms relative to their original positions,namely,surface relaxation occurs,causing sulfur atoms to appear on the outermost surface.Horizontally,AFM spectrum showed that the interatomic distance is irregular and that a reconstruction occurs on the surface.One result of this reconstruction is that two or more atoms can be positioned sufficiently close so as to form atomic aggregates.The lattice properties of these models were calculated based on DFT theory and compared with the experimental results and those of previous theoretical works.On analyzing the results,the atomic arrangement on the（001） surface of chalcopyrite is observed to become irregular,S atoms move outward along the Z-axis,and the lengths of Cu—S and Fe—S bonds are enlarged after geometry optimization because of the surface relaxation and reconstruction.The sulfur-rich surface and irregular atomic aggregates caused by the surface relaxation and reconstruction greatly influence the bulk flotation properties of chalcopyrite.

硫系添加剂在高镍锂离子电池中的改性研究

为了改善高镍锂离子电池的性能,在电解液中加入PS和DTD两种硫系添加剂。实验结果表明,PS和DTD均可有效改善电池性能,尤其是DTD,显著改善了电池的低温放电性能、倍率性能和高温贮存性能,可作为高镍圆柱形锂离子电池的改性成膜添加剂。

富硫气管道净化排水装置改造

介绍了烧结生产过程中产生大量烟气,烟气通过脱硫脱硝工序中吸附塔内的活性炭吸附,活性炭在解析塔里进行解析,产生富含SO_(2)的混合气体,混合气体通过管道和风机输送至制酸系统,在混合气体输送过程,烟气温度下降,输送富硫气在管道内产生冷凝水。管道内冷凝水会与富硫气中SO_(2)和SO3形成稀酸,加剧富硫气管道与冷凝水外排系统腐蚀,降低设备使用寿命,产生漏酸漏气等安全事故,影响正常生产过程,所以管道内冷凝水需要定期外排。通过实施改造方案,解决生产过程中存在的问题,该方案结构简单、使用方便,利用大气环境与富硫气管道内压差,实现了无动力排水,且在正常生产过程中排水一直在自动持续进行,极大程度减少稀酸带来的危害,避免人工定期排水存在的劳动强度大、工作环境差及安全健康隐患,大大提高了排水的效率和效果。

云南元阳大坪金矿床成矿流体特征及矿床成因探讨

云南元阳大坪金矿床是哀牢山金矿带典型的造山型矿床,但局部又呈现出与浅成低温热液型金矿一致的特性,因而与国外典型的造山型金矿床存在差异,对其成矿作用过程的研究仍然存在较多争议。本文以富CO_(2)流体为切入点,揭示大坪金矿床主成矿阶段成矿流体特性,结合硫化物原位S同位素分析,探讨矿床成因。详细的流体包裹体岩相学观察结果表明,大坪金矿床主成矿阶段的成矿流体,主要由不同CO_(2)/H_(2)O比例的CO_(2)-H_(2)O型包裹体组成,包括含CO_(2)气液两相包裹体(L_(H_(2)O)+V_(CO_(2)))、含CO_(2)气液三相包裹体(L_(H_(2)O)+L_(CO_(2))+V_(CO_(2)))及少量气水包裹体(L_(H_(2)O))。均一温度集中在280℃~360℃之间,w(NaCl,eqv)=6.03%~13.20%,成矿流体为中温、中低盐度的NaCl-H_(2)O-CO_(2)体系。据状态方程估算的成矿深度为3~8 km,具备典型剪切带控制下的中深中温热液金多金属矿床特征。在富含CO_(2)的成矿流体中,金可能主要以硫氢络合物形式迁移,金的沉淀主要与压力骤降条件下发生流体的相分离作用相关。在拉张和强韧性剪切条件下,地幔排气形成的深部地幔流体与下地壳脱水形成的富CO_(2)流体发生混合作用,CO_(2)可导致NaCl-H_(2)O体系在较高的P-T条件下发生相分离,增进了不混溶作用的发生,含矿热卤水沿韧性剪切带上升,且在闪长岩和灰岩地层的构造破碎带中分别形成含金脉。

黄河口凹陷BZ35/36构造高硫原油特征及运聚方向

渤海湾盆地黄河口凹陷BZ36构造沙河街组、东营组及BZ35构造东营组产出中—重质高硫原油,其物理性质及地球化学特征与黄河口凹陷其他构造所产原油有显著差别。通过姥/植比、伽马蜡烷、C24Te/C26TT、C2920S/(20S+20R)、C29ββ/(ββ+αα)等生物标志化合物的对比分析,认为上述2个构造所产高硫原油与紧邻黄河口凹陷东部的庙西凹陷高硫低熟原油具有亲缘性。庙西凹陷的高硫低熟原油由NE向SW方向充注,黄河口凹陷的低硫成熟原油则向相反方向充注,由于2个凹陷均有较强的生烃潜力,处于2个凹陷油气充注路径上的BZ36、BZ35构造聚集了来自黄河口凹陷与庙西凹陷烃源岩生成的原油。通过与同类型高硫原油的类比,初步认为该类型高硫低熟原油的母岩形成于干旱强还原及生物繁茂的盐湖。

矿化剂元素硫(S)与成矿

矿化剂元素硫(S)是绝大多数有色金属矿床成矿矿物中必不可少的组成物质,其对矿床形成的直接控制作用不言而喻。在目前收集到的文献资料中,有关S的研究多集中在示踪成矿流体来源方面,而关于地质体中S初始富集及其在成矿过程中的活动特性对成矿的控制却少有涉及。本科研团队历经十余年,在40多个矿床上对矿化剂元素S与成矿进行了系统研究,结果发现,热液成因矿床均产出在富S地质体中,地质体中S的富集与赋矿围岩同期形成,而且伴生有成矿元素的富集,构成初始矿源,奠定成矿物质基础。热液活动期间,初始矿源中矿化剂元素S及成矿元素发生活化、迁移和再富集,是控制成矿的直接因素。青海野马泉铁多金属矿研究结果证实,试验区灰岩中S的富集与灰岩同期形成,同时伴生有Pb、Zn、Ag、Cu等富集,构成矿源层。后期热液作用主导矿源层中S与成矿元素活化、迁移和再富集是成矿的必要条件,矿源层的沉积环境具有其特殊性。此项研究成果对矿床形成机制研究和矿床地球化学勘查均具有借鉴价值。

济阳坳陷盐湖沉积环境高硫稠油的特征及成因

依据物理性质可将济阳坳陷罗家垦西地区高硫稠油分为高硫稠油和特稠油，高硫稠油有完整的正、异构烷烃分布，C29甾烷立体异构化参数为0．41～0．54，高于一般低熟油。但仍具有盐湖环境低熟油常见的生物标志物特征，并含有异常丰富的C21、C22孕甾烷、罕见的C28-28，30-二降藿烷、甲基藿烷系列、含硫藿烷及硫在C16、C22位的含硫甾烷。高硫特稠油的正、异构烷烃有不同程度损失，甾、萜类及绝大部分芳烃类化合物特征与稠油相同。油源对比及烃源岩可溶有机质的定量测定表明，高硫稠油主要来源于渤南洼陷沙四上亚段膏盐沉积环境Ⅰ、Ⅱ，型干酪根优质烃源岩，其生油高峰的R。为0．55％～0．60％。达生油高峰时可溶有机质占烃源岩总有机质的85％，因此高硫稠油主要来自可溶有机质，属于非干酪根晚期热降解成因的低熟油。

黄铁矿对有机质成烃的催化作用讨论

粘土矿物、碳酸盐、石英等无机矿物对有机质演化的催化作用已被确认。有机质干酪根类型还与黄铁矿含量、形态有关，而其中硫的含量直接影响到干酪根反应的活化能、反应速率；指出黄铁矿也是一种有效的催化剂。鉴于世界原油中有很大一部分产自高硫干酪根，深入研究其中的机理是当前石油地球化学中一项刻不容缓的任务。