延长甲醇合成催化剂使用寿命降低甲醇生产成本

C301甲醇合成催化剂价格昂贵,其使用寿命的长短直接关系到甲醇生产产量的高低,而且也影响甲醇的生产成本。因此如何延长其使用寿命具有很重要的现实意义。     

甲醇缩合制二甲醚新型催化剂的研究

将用直接法合成的 ZSM-5分子筛经改性后用于甲醇缩合制二甲醚反应中。考察了催化剂焙烧温度、磷镁改性、反应温度及甲醇进料空速对催化活性的影响,并进行了稳定性和再生试验。     

New Generation Catalyst for Methanol Pyrolysis Developed by CAS Passed Appraisal

正On June 4,2012 the Science and Technology Department of Shanxi province organized an meeting for assessing the achievements of the project Research and development of a new-generation high-selectivity catalyst for methanol pyrolysis undertaken by the CAS Shanxi Coal     

甲醇脱氢制甲醛反应中Na_2CO_3催化剂的失活与再生

在Φ16mm陶瓷管固定床反应器中考察了甲醇脱氢制甲醛反应中Na2CO3催化剂的寿命和稳定性。结果表明,Na2CO3催化剂部分失活原因是烧结和积炭,XRD表明反应后催化剂粒径有所增大。用空气氧化法和水蒸汽都可消除积炭使Na2CO3催化剂再生。再生后的碳酸钠催化活性较新鲜催化剂略有降低,但其催化活性也能在55h内保持稳定。     

新型催化剂上甲醇分解制氢过程的宏观动力学及反应行为

在床层等温的条件下，建立了单管反应器的一维拟均相数学模型，并得出了新型催化剂上甲醇分解制氢过程的宏观动力学方程。对不同条件下的反应行为进行了研究，模拟计算表明，新型催化剂对甲醇分解及一氧化碳变换具有良好的性能。     

合成气制甲醇铜基催化剂的研究新进展

概述了以合成气为原料合成甲醇反应中铜基催化剂的研究现状和最新进展,其中分别讨论了铜基催化剂的制备方法、助剂、活性中心以及甲醇合成的机理和动力学等方面内容。     

A Physicochemical Evaluation of Modified HZSM-5 Catalyst Utilized for Production of Dimethyl Ether From Methanol

A number of HZSM-5 catalysts modified with 5 wt% Mg, Na, Zr, and Al as well as others modified with 5–60 wt% Zn prepared by wet impregnation. These materials were characterized by the NH₃-TPD, XRF, and XRD analyses and tested in a slurry reactor to determine their activities in dehydration of methanol solution in kerosene. Reactions were carried out at 230°C and 19 bar for 4 h of residence time in the reactor. Results showed that in the first series, the catalyst modified with Zr and in the second series, the one modified with 10 wt% Zn led to the highest methanol conversion. It was deduced that elimination of strong acid sites and partial replacement of active cations in the HZSM-5 zeolite lattice enhanced the performance and improved resistance against formation of hydrocarbons and other by-products such as olefins all of which acted as coke precursors. In order to determine the activation energy, the rate equation of Bercic and Levec was utilized and assumptions consistent with reaction conditions considered. Hence, rate constants determined empirically through fitting experimental data to the aforementioned rate equation. Ultimately, the related activation energies were calculated. In comparison with common dehydration catalysts such as alumina, the activation energies of the modified catalyst decreased. Nonetheless, the superior performance of the modified HZSM-5 attributed mainly to the elimination of strong surface acid sites by partial substitution of cations resulted in prevention of coke and undesired hydrocarbon formation.     

8MPa压力下甲醇合成反应本征动力学研究

在等温积分反应器中测定了甲醇合成反应本征动力学,实验压力为8MPa,体积空速为5000~10000h-1,反应温度200~260℃,实验采用0.154~0.198mm的铜基国产商用催化剂。以双曲型动力学方程形式建立了以各组分逸度表示的CO、CO2加氢合成甲醇的双速率本征动力学模型,用参数估值方法根据实验数据获得了动力学模型中的参数。残差分析和统计检验表明,动力学模型是适宜的。     

一种活性高、热稳定性好的甲醇合成催化剂

甲醇合成催化剂中添加第4组分Zr,制得Cu Zn Al Zr催化剂,研究了制备方法对4组分甲醇合成催化剂性能的影响。用改进沉淀法所得催化剂活性最高,在230℃,3 0MPa,5500ml/(g cat·h)空速的温和条件下,甲醇时空产率达到0 978g/(g cat·h),活性和热稳定性均优于两种工业化催化剂C301和APCI。尤其是在200℃的较低温度下,活性是它们的两倍。XRD结果表明催化活性与前驱体结构密切相关。     

新型低压合成甲醇催化剂的研制

用共沉淀法制备了一种新型的低压合成甲醇催化剂QCM-01。考察了制备条件、原料配方对催化剂性能的影响。用TPR、XRD技术对催化剂微观结构进行了表征,并用加压微反评价装置考察了催化剂的活性及活性稳定性。     

Novel Methanol Synthesis Catalyst Passed Commercial Side-line Acceptance Test

Recently, the novel low-temperature and high-perfor-mance catalyst for methanol synthesis jointly developed by the Datang Chemical Research Institute and the Xia- men University has passed the commercial sideline ac- ceptance test. The expert group has unanimously admitted that this methanol synthesis catalyst has superior perfor-mance in terms of its low-temperature activity, thermal stability, selectivity and resistance against process condi-tion fluctuations, with its overall performance in the com-mercial sideline operation meeting the expected results.     

随车制氢甲醇裂解铜水泥催化剂的研究

分别以H2O,H3BO3,C6H8O7,NH3.H2O为溶剂,采用离子交换法制备了铜水泥催化剂,并在固定床上考察了催化剂催化甲醇裂解的性能。实验结果表明,以H2O代替NH3.H2O制得的铜水泥催化剂性能优越,实现了催化剂制备的环保高效。与商用的CuZnAl甲醇裂解催化剂相比,铜水泥催化剂具有较高催化活性和选择性,在常压、300℃、重时空速3.39h-1的条件下,铜水泥催化剂的比活性(甲醇转化率与铜负载量的比值)和CO+H2的选择性分别为2.44和95.9%,CuZnAl催化剂分别为0.64和89.2%;铜水泥催化剂的抗压强度大于45N,而CuZnAl催化剂的抗压强度为20N。铜水泥催化剂具有机械强度高、活性高、CO+H2选择性高的特点,基本满足了随车制氢的要求。XRD,SEM,DTG-DTA,FTIR,H2-TPR表征结果显示,铜水泥催化剂制备过程中形成的CaCO3具有稳定铜物种的作用,有助于保持催化剂的高温活性。     

用煤层气(CMM)生产甲醇的探讨

提出了一种利用矿井区煤层气(CMM)生产甲醇的方法。经过脱硫后的煤层气,在催化剂存在下进行自热转化和外加热转化,得到的H2、CO2、CO,少量CH4和N2的混合气,利用二段变压吸附分离技术脱除氮气,得到含CO、CO2、少量N2气和含98%以上H2气的两股气,混合后得到甲醇的合成气。加压后,送入甲醇合成工序。以含40%甲烷的煤层气为原料,每吨甲醇脱氮费用约224元,具有较好的经济效益和社会效益。     

甲醇生产与市场应用前景

通过对甲醇生产技术、应用、市场的调研,从国内外技术方案到所用原料进行了介绍,探讨了今后发展的趋势,对甲醇行业存在的问题进行了分析,提出了甲醇的发展建议.     

甲醇清洁生产及污染控制

阐述了甲醇生产过程中污染物的治理措施。通过治理,减少了生产过程中污染物的排放,降低了生产成本,实现了甲醇的清洁生产。     

Commercial Production of Novel Catalyst for Isomerization ofC8 Aromatics at SINOPEC

正The novel catalyst for isomerization of C8 aromatics de veloped by SINOPE’s Research Institute of Petroleum Processing(RIPP)has been produced in commercia scale at the Catalyst Factory of the Fushun Petrochemica Company following two scale-up experiments.The said