PDS型脱硫催化剂在我厂的应用

该厂使用PDS型脱硫催化剂能高效地脱除H_2S,亦能脱去部分的有机硫(较使用对苯二酚为佳),获得了较好的经济效益(年节约20000元左右)。文章对其流程、使用方法、脱硫效果等作了介绍。     

板框式压滤机处理硫泡沫应用总结

0前言山西兰花科创股份有限公司化肥分公司现有12kt/a和10kt/a合成氨装置各1套。脱硫工段有4套脱硫装置(新、旧半脱和新、旧变脱装置),现用脱硫催化剂有RTS,NDC和栲胶。若只加RTS,脱硫效率差;若只加NDC,虽能保证脱硫效率,但硫泡沫形成不好,甚至无泡沫,还容易对设     

PDS脱硫技术应用

PDS是一种高效,高硫容的脱硫催化剂,它不仅能脱除无机硫,还可以脱除有机硫。用PDS脱硫时悬浮液中的单体硫颗粒粗大,易于分离。在脱硫液中添加少量(10～30ppm)的PDS即可起到明显的催化作用,工艺流程和设备无需大动,只需增加少量辅助设备即可。在按预定方案将ADA脱硫过渡为PDS脱硫之后,工艺上产生了一些波动,脱硫效率不稳,难以控制。我厂在试用中通过认真的探索,对原操作方案加以发展和完善,总结出一套新颍的操作方法,成功地解决了一些技术难题,稳定了操作。目前,我厂的PDS脱硫系统运行正常,脱硫后H_2S含量在10ppm以下(其中70～80％的     

甲醇生产中精脱硫工艺及脱硫剂的选择

评述了不同原料制取甲醇合成气时有机硫转化催化剂与硫吸收剂的合理搭配方式,给出了近年在国内甲醇生产厂实际使用时的脱硫效果和存在问题。当以重（渣）油或煤为原料部分氧化法制气时,在近室温下水解催化剂串接氧化锌脱硫剂可确保总硫脱除到0.01ppm以下,具有最佳节能和精脱硫效果。     

UDS-2高效复合脱硫溶剂在元坝净化厂脱硫装置的应用

介绍了华东理工大学研发的新型UDS-2高效复合脱硫溶剂在元坝净化厂300×104Nm3/d脱硫装置的运行情况,考察了UDS-2脱硫、脱碳及脱有机硫效果,并对运行中出现的问题做了具体分析。该溶剂通过在元坝净化厂脱硫装置8个月的工业应用,结果表明,UDS-2能有效脱除含硫天然气中的有机和无机硫化物,具有良好的H2S和有机硫脱除效果,对硫化物尤其是包括COS、硫醇等在内的有机硫化物的脱除选择性优于常规脱硫溶剂。溶剂的性能稳定,对设备腐蚀性小,在有机硫含量较高场合较为适用。     

水煤气无变换有机硫加氢转化与脱除工艺技术的探讨

介绍了水煤气无变换有机硫低温加氢转化与活性炭脱除工艺,讨论了有机硫转化工艺条件的确定和加氢催化剂的选择,分析了活性炭脱硫剂的工艺要求和湿法脱硫的工艺条件,工艺运行表明,及时掌握工艺指标及控制情况,研究噻吩产生机理和脱除技术,可保障系统长周期运行。     

焦炉气净化中的有机硫加氢工艺应用技术

焦炉气脱硫的技术瓶颈是如何深度脱除形态复杂、难以用常规方法分解脱除的有机硫,目前只有加氢转化法是相对经济可靠的成熟技术。加氢转化脱硫工艺经过多年的改进,已经由一级加氢脱硫发展到二级加氢脱硫工艺,但仍存在热效率低、氧含量影响大、催化剂寿命短等缺陷。在已有的工程经验基础上,提出了增加除氧反应器的换热流程工艺设计方案。在优化加氢脱硫系统的基础上,通过调整优化催化剂的组合,达到了既保证系统稳定运行又充分利用热能的目的,取得了很好的推广利用效果。     

PDS—400型脱硫催化剂及其应用

介绍了ＰＤＳ－４００型脱硫催化剂的基本特征及ＰＤＳ脱硫技术的应用情况。该催化剂具有高催化活性和高选择性，脱有机硫效率为６０％，对于含Ｈ２Ｓ１０－３０ｇ／Ｎｍ＾３的煤气的脱除能达到９８％以上，ＨＣＮ脱除率可达９５％以上。     

JTL—5精脱硫新工艺在以高硫煤为原料工艺中的应用

采用ＪＴＬ－５精脱硫新工艺,用于以高硫煤为原料的碳化原料气中脱除微量硫,其特点是能脱除Ｈ２Ｓ、ＣＯＳ和ＣＳ２,使甲醇催化剂进口气体中的硫化物含量控制在指标以内,延长了甲醇催化剂的使用寿命,降低生产成本。     

保护甲醇与醇烃化催化剂的常温精脱硫工艺选择和应用

本文介绍了保护甲醇与醇烃化催化剂的三种常温精脱硫工艺及特点,阐述了如何选择精脱硫工艺和精脱硫剂,总结了应用效果。这三种工艺均可将原料气中总硫（H2S＋COS＋CS2）脱除至〈0．1×10^-6,有效保护甲醇与醇烃化催化剂,延长催化剂的使用寿命,提高催化剂的生产强度,保证生产装置长周期稳定运行。     

常温有机硫水解串活性碳精脱硫工艺的工业应用

介绍了常温有机硫水解串活性炭精脱硫工艺的基本原理和工艺流程,总结了精脱硫工序的操作要点和开停车注意事项、运行过程中曾经出现的问题和解决办法以及延长水解剂和活性炭使用寿命的办法。运行实践证明,该工艺先进可靠,操作简便,能够将净化气中总硫含量控制在0.1×10-6以下,保证了净化气的质量,有效的延长了甲醇合成催化剂的寿命。     

以888-JH为催化剂Na_2CO_3为碱源的脱硫技术

本文着重介绍以888-JH为催化剂,Na2CO3为碱源焦炉煤气(COG)湿式氧化法脱硫工艺的脱硫原理、影响因素,并介绍了现场试验结果。认定单独使用888-JH可以替代PDS+RTS获得脱硫效率99%以上和出口H2S含量小于5mg/m3的较佳脱硫效果。     

Desulfurization matching with coal poly-generation system based on dual gas resources

The coal poly-generation system for the production of alcohol and ether fuels as well as power is one of advanced coal utilization techniques. The team leaded by Professor Xie Kechang is carrying out the research on the poly-generation system to produce the syngas from the combination of gasified and pyrolyzed coal gas (dual gas resources) for the alcohol ether synthesis. Gas desulfurization is one of the key technologies for this system. The desulfurization matching with dual gas resources based poly-generation system for the production of alcohol and ether fuels as well as power is presented according to gas components, sulfur content, sulfur species and desulfurization accuracy in this technology. This matching desulfurization is classified into hot gas desulfurization, normal gas desulfurization, warm gas desulfurization and organic sulfur catalytic conversion. The preparation of H₂S removal sorbents, organic sulfur hydrolysis catalyst and the evaluation of their activities involved in the system were investigated. The H₂S removal efficiencies of the crude and fine desulfurization sorbents prepared for hot gas desulfurization are 90% and 99% at 500 °C in simulating coal gas, and their sulfur capacities are 21.85 wt.% and 24.91 wt.%, respectively. The organic sulfur catalyst shows the high hydrolysis activity, and the hydrolysis conversion of COS is more than that of CS₂ on the same catalyst. The research will provide necessary information for the matching desulfurization technology in the demonstration project on dual gas resources coal poly-generation system.     

液化气深度脱硫醇技术的应用与分析

采用“液化气深度脱硫技术”,对液化气脱硫醇装置进行改造。改造后脱硫醇装置运行半年来,操作平稳,总硫脱除效果稳定。进料混合液化气的总硫在400～600mg／Nm3范围内,精制后总硫平均低于10mg／Nm3,产品铜片腐蚀合格,MTBE硫含量均低于0．005％。彻底解决了MTBE总硫高,影响93。汽油调和的问题。     

氨基功能化HMS负载磷钨酸催化氧化脱硫研究

以硅烷偶联剂(KH-550),采用二次合成的方法对六方介孔二氧化硅HMS分子筛进行氨基表面功能化,并采用浸渍法将磷钨酸(HPW)负载于功能化样品上,即制成负载型磷钨酸催化剂(HPW/NH2/HMS),以过氧化氢为氧化剂,以含苯并噻吩的石油醚作为模拟燃料油,进行催化氧化脱硫的研究。在反应温度为60℃、m(O)∶m(S)=16、m(催化剂)∶m(模拟油)=0.45、反应时间为1.5h条件下,确定了氧化脱硫工艺条件。在最佳工艺条件下,w(硫)由973μg/g降至129μg/g,脱硫率达86.79%。通过对比发现,HPW/NH2/HMS的脱硫效果比HPW的脱硫效果好,负载后催化剂的活性得到大大提高。重复使用7次,脱硫率仍可达83.49%,催化剂重复使用性能较好。     

Using response surface methodology to optimize ultrasound-assisted oxidative desulfurization

Latest strict environmental regulations have restricted the sulfur content of diesel fuels; therefore, deep desulfurization of fuels is required. Ultrasound-assisted oxidative desulfurization (UAOD) is an alternative for conventional desulfurization methods which can remove sulfur compounds from fuels under mild process conditions. In this study, UAOD of gasoil using tungstophosphoric acid catalyst and tetraoctylammonium bromide as a phase transfer agent in the presence of hydrogen peroxide as an oxidant was optimized. The optimal design of experiments was generated based on central composite face-centered design of Response surface methodology (RSM) to study effects of four process variables such as oxidant volume, mass of catalyst, mass of phase transfer agent and the ultrasonic wave amplitude on the sulfur conversion of gasoil. In addition, a predictive model of sulfur conversion was obtained based on RSM. The optimal values of process variables were evaluated to be 21.96 mL of oxidant, 1 gr of catalyst and 0.1 gr of phase transfer agent to achieve the maximum sulfur conversion of 95.92%.     

From waste to best: excellent desulfurization performance of spent FCC catalyst

Fluidized catalytic cracking (FCC) is an important link in heavy oil processing. Industrial FCC catalyst which mainly consists of molecular sieves, substrates and adhesives is used in large quantities every year. Spent FCC catalyst is one kind of hazardous solid waste that is hard to handle. In this paper, we used a spent FCC catalyst as a desulfurization adsorbent, and show that it displays advanced desulfurization property. Furthermore, regeneration experiment showed that calcination was an effective method to remove the sulfides adsorbed in spent FCC catalyst, after four cycles it still owned a high sulfur adsorption ability. The results of metal impregnation indicated that the high ability to remove sulfur in LPG was due to those metals deposited on WC. The sulfur removal further increased by calcination of the spent catalyst since carbon deposition on the catalyst surface which blocked the active sites was minimized by calcination, thus leading an increase in the number of active sites available.     

SQ105型精脱硫剂的实验室研究

介绍了SQ105型脱硫剂常温脱除H2S、COS和CH3SH的实验室研究以及在不同气体中脱除COS的性能。结果表明,该脱硫剂在常温条件下脱除COS的反应速率较低;反应温度40 ℃时,该脱硫剂显示较好的脱除COS性能,具有硫容大、脱除率高和气氛效应小的特点。     

Deep desulfurization of diesel via peroxide oxidation using phosphotungstic acid as phase transfer catalyst

High sulfur level in diesel fuel has been identified as a major contributor to air pollutant in term of sulfur dioxide (SO_x) through diesel fueled vehicles. The main aim of the present work is to develop a promising methodology for ultra deep desulfurization of diesel fuel using oxidation followed by phase transfer of oxidized sulfur. Experiments were carried out in a batch reactor using n-decane as the model diesel compound and also using commercial diesel feedstock. To remove sulfur tetraoctylammonium bromide, phosphotungstic acid, and hydrogen peroxide were used as phase transfer agent, catalyst and oxidant respectively. The percent sulfur removal increases with increasing the initial concentration of sulfur in fuel and with increasing the reaction temperature. Similar trends were observed when commercial diesel was used to carry out desulfurization studies. The amphiphilic catalyst serves as a catalyst and also as an emulsifying agent to stabilize the emulsion droplets. The effects of temperature, agitation speed, quantity of catalyst and the phase transfer agent were studied to estimate the optimal conditions for the reactions. The sulfur removal from a commercial diesel by phase transfer catalysis has been found effective and removal efficiency was more than 98%. Kinetic experiments carried out for the desulfurization revealed that the sulfur removal results are best fitted to a pseudo first order kinetics and the apparent activation energy of desulfurization was 30.6 kJ/mol.     

FCC汽油烷基化脱硫研究

分别采用大孔磺酸树脂NKC-9及FCC汽油烷基化催化剂SW—I对FCC汽油进行静态及动态烷基化脱硫研究。结果表明,SW—I烷基化脱硫操作条件更为缓和,其催化活性及寿命均优于NKC-9树脂。在反应温度60℃、反应时间60 min和剂油质量比1:100的条件下,SW—I烷基化脱硫汽油硫含量降至181.7μg·g~(-1),脱硫率63.49%,收率85.30%。SW—I对不同硫含量的FCC汽油均具有一定的脱硫效果,脱硫适应性较强。通过对汽油烷基化反应前后硫化物的分布分析发现,烷基化反应使FCC汽油中的大部分噻吩类化合物反应生成沸点更高的产物,通过蒸馏分离将其除去,达到脱硫目的。