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利用IROX2000傅立叶红外光谱仪测定不同甲醇含量的甲醇汽油样品,与气相色谱方法进行了对比,找出了红外光谱法准确测定甲醇汽油中甲醇含量的范围,并验证其可靠性。实验证明,中红外光谱法具有分析快速、重复性好、分析成本低等优点。 相似文献
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《化学工程》2016,(5)
高能耗是制约甲醇制丙烯(MTP)工艺发展的重要瓶颈,甲醇降级进料是MTP工艺降本增效的可能途径。文中首先通过理论分析和流程模拟探讨了MTP工艺中甲醇降级进料的可行性,流程模拟结果表明采用粗甲醇为原料,二甲醚预反应器负荷增加约12%,MTP反应器的转化率不变。在神华宁煤煤化工分公司的MTP装置生产中通过调节工艺参数实现了甲醇降级进料工业实验研究。运行结果表明:MTP装置出口组成和产能基本不变,废水COD有所提高,但在排放标准范围之内,1 t甲醇耗低压蒸汽由1.1 t/t下降至0.66 t/t,每年可节约(折合成燃料煤)14万t、脱盐水15万t、电1.8×10~6k W·h,节能降耗效果明显。 相似文献
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马晓辉 《化学工业与工程技术》2011,32(2):51-53
介绍了MegaMax 700型甲醇合成催化剂在新型MegaMethanol大型甲醇反应器中的装填和还原情况,阐述了催化剂的还原过程和还原控制要点。 相似文献
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A series of pervaporation (PV) hybrid membranes were prepared via the crosslinking of poly(vinyl alcohol) with formaldehyde solution with N‐3‐(trimethoxysilyl) propyl ethylenediamine (TMSPEDA) as a hybrid precursor of the sol–gel process. Both the thermal stability and separation performances of the prepared hybrid membranes were investigated. Thermogravimetric analysis showed that the thermal degradation temperature of the hybrid membranes was beyond 250°C. Differential scanning calorimetry indicated that both the glass‐transition temperature and the crystallization temperature increased with elevated TMSPEDA contents in the hybrid membranes. PV experiments demonstrated that for membranes A–D, both the permeation flux and separation factor indicated the same trade‐off effect. Moreover, it was found that for individual membranes, the permeation flux increased as the feed temperature was increased. Meanwhile, the separation factor revealed an change trend opposite to that of the permeation flux. Furthermore, proper addition of TMSPEDA in the hybrid membrane was found to reduce the permeation activation energy. On the basis of these findings, we deduced that these hybrid membranes have potential applications in the separation of methanol/water mixtures. © 2012 Wiley Periodicals, Inc. J. Appl. Polym. Sci., 2013 相似文献
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我国将力争于2060年前实现碳中和,而实现碳中和的根本途径是能源利用形式由化石能源向可再生能源转变。本文指出太阳燃料甲醇合成(又称“液态阳光”)是利用太阳能等可再生能源分解水制取绿氢,再将二氧化碳与绿氢结合转化为甲醇的综合性技术,它不仅可将再生能源存储在液体燃料甲醇中,还可解决重要领域如冶金、建材、化工中的刚性二氧化碳排放,是实现碳中和目标切实可行的技术路线和有力手段。本文就作者团队研究发展的液态阳光水分解制氢和二氧化碳加氢制甲醇技术进行总结,并对当前液态阳光技术的工业应用进行了介绍。 相似文献
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Copper-based reforming catalyst was placed adjacent to ADVENT Technologies high-Temperature polymer electrolyte membrane/electrode assembly in a novel internal reforming methanol fuel cell (IRMFC) and tested for their electrochemical properties and chemical stability under various methanol/water anode feedstreams. Polarization measurements and AC impedance spectroscopy combined with measurements of reactor outlet composition were carried out. Methanol is being reformed inside the anode compartment of the fuel cell at 200 °C producing H2, which is readily oxidized at the anode to produce electricity. The reformer provides enough hydrogen supply for efficient fuel cell operation at 600 mV with 0.2 A cm−2 and a hydrogen stoichiometric ratio of 1.2 (λH2 = H2 fed/H2 reacted = 1.2). However, unreacted MeOH (~5 %) in combination with low H2 content poisons the anode electrode and the cell performance rapidly decreases. Gradual recovery of the initial performance under pure H2 is observed after switching to pure H2. A slight improvement of the cell’s design by the introduction of a pre-reforming step significantly improves the electrocatalytic behavior. 相似文献
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《化学工业与工程技术》2020,(3):20-22
介绍了国家能源集团宁夏煤业甲醇分公司60万t/a甲醇合成装置5炉催化剂的使用概况,重点介绍了最近2炉催化剂的使用效果和存在问题。从催化剂物化性能、工业操作条件、还原过程、运行数据等方面,对近期使用的国外催化剂B和国产C307型催化剂进行了对比,对催化剂使用过程中出现的问题进行了分析,并对C307型催化剂进行了运行工况的优化调整,使C307型催化剂在该装置上达到了令人满意的使用效果,同时指出国产甲醇合成催化剂需要在运行经济性、能耗、使用寿命、稳定性等方面进一步提高和改善。 相似文献
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在固定床等温积分反应器内进行了甲醇制烯烃反应动力学研究,借助集总动力学的概念,充分考虑到水和积炭对反应过程的影响,得到甲醇制烯烃反应动力学模型方程.采用Runge-Kutta法求解动力学微分方程,并优化动力学参数,最终得到了可计算各集总组分反应速率的总动力学方程.然后根据乙烯、丙烯、丁烯相互之间的比值随温度的变化规律,分别计算出乙烯、丙烯、丁烯在任一条件下的反应速率方程.通过统计检验及计算值与实验值的比较,结果较为满意. 相似文献
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