Optimization of the separation unit of methanol to propylene(MTP)process and its application

论文摘要

Based on a typical gas composition from a methanol-to-propylene（MTP） reactor, and guided by a requirement to recover both propylene and ethylene, three separation strategies are studied and simulated by using PROII package. These strategies are sequential separation, front-end dethanization, and front-end depropanization.The process does not involve an ethylene refrigeration system, using the separated stream as absorbent, and absorbing further the medium-pressure demethanization, and a proprietary technology by combining intercooling oil absorption and throttle expansion. Influences of different process streams as absorbent are studied on energy consumptions, propylene and ethylene recovery percentages, and other key-performance indicators of the separation strategies. Based on a commercial MTP plant with a methanol capacity of 1700 kt·a-1, the simulated results show that the front-end dethanization using the C4 mixture as absorbent is the optimal separation strategy, in which the standard fuel oil consumption（a key-performance indicator of energy consumption） is18.97 kt·h-1, the total power consumption of two compressors is 22.4 MW, the propylene recovery percentage is 99.70%, and the ethylene recovery percentage is 99.70%. For a further improvement, the pre-dethanization and thermal coupling methods are applied. By using front-end pre-dethanization（partial cutting） with debutanizeroverhead, i.e. the C4 mixture, as absorbent, the power consumption of the compressors decreases to 19.9 MW, an 11% reduction compared with the clear-cutting method. The energy consumption for the dual compressors for crude gaseous product mixture and main product propylene refrigeration is 16.69 MW, 16.55% lower than that of the present MTP industrial plant with the same scale, and a total energy consumption of 20 MW for the triple compressors including product gas mixture compression, and ethylene and propylene refrigeration.

论文目录

文章来源

类型: 期刊论文

作者: Zizong Wang,Hongqian Liu,Jiming Wang

来源: Chinese Journal of Chemical Engineering 2019年05期

年度: 2019

分类: 工程科技Ⅰ辑

专业: 有机化工

单位: East China University of Science and Technology,China Petrochemical Corporation,SINOPEC Engineering Incorporation

基金: Supported by Sinopec Group company commissioned development project(contract number:412101)

分类号: TQ221.212

页码: 1089-1093

总页数: 5

文件大小: 747K

下载量: 16

相关论文文献

• [1].OMT Catalyst Developed by SINOPEC Shanghai Research Institute of Petrochemical Technology Has Been Applied in Commercial Scale[J]. China Petroleum Processing & Petrochemical Technology 2020(01)
• [2].Balancing the Activity and Selectivity of Propane Oxidative Dehydrogenation on NiOOH(001) and(010)[J]. Transactions of Tianjin University 2020(05)
• [3].Selective propylene epoxidation in liquid phase using highly dispersed Nb catalysts incorporated in mesoporous silicates[J]. Chinese Journal of Chemical Engineering 2018(06)
• [4].Epoxidation of propylene by molecular oxygen over unsupported AgCu_x bimetallic catalyst[J]. Rare Metals 2015(07)
• [5].Synthesis,characterization and catalytic performance of Mo based metal-organic frameworks in the epoxidation of propylene by cumene hydroperoxide[J]. Chinese Chemical Letters 2017(05)
• [6].Production of propylene from an unconventional metathesis of ethylene and 2-pentene over Re_2O_7/SiO_2-Al_2O_3 catalysts[J]. Journal of Natural Gas Chemistry 2012(01)
• [7].Synergetic effect of TeMo_5O_(16) and MoO_3 phases in MoTeO_x catalysts used for the partial oxidation of propylene[J]. Journal of Natural Gas Chemistry 2011(03)
• [8].SKC Opens PO Plant in Korea[J]. China Chemical Reporter 2008(22)
• [9].Direct gas-phase epoxidation of propylene to propylene oxide using air as oxidant on supported gold catalyst[J]. Journal of Natural Gas Chemistry 2008(02)
• [10].Site-and surface species-dependent propylene oxidation with molecular oxygen on gold surface[J]. Chinese Chemical Letters 2018(12)
• [11].Regulation of Propylene and 1-Methylcyclopropene on Expressions of ACS and ACO Genes in Persimmon Fruits[J]. Agricultural Sciences in China 2009(10)
• [12].Propylene Epoxidation by Dioxygen over Catalyst Copper-loaded TiO_2[J]. Chemical Research in Chinese Universities 2011(05)
• [13].Biocause to Build Propylene Project[J]. China Chemical Reporter 2010(21)
• [14].Preparation of Chlorinated Poly(propylene carbonate) and Its Distinguished Properties[J]. Chinese Journal of Polymer Science 2017(09)
• [15].Effect of crystallization temperature and propylene sequence length on the crystalline structure of propylene-ethylene random copolymers[J]. Chinese Science Bulletin 2008(12)
• [16].Advances in DCC Process and Catalyst for Propylene Production from Heavy Oils[J]. China Petroleum Processing & Petrochemical Technology 2011(01)
• [17].Role of support nature (γ-Al_2O_3 and SiO_2-Al_2O_3) on the performances of rhenium oxide catalysts in the metathesis of ethylene and 2-pentene[J]. Journal of Natural Gas Chemistry 2012(02)
• [18].Diffusion and Adsorption of Benzene and Propylene in MFI,MWW and BEA Zeolites:Molecular Dynamics and Grand Canonical Monte Carlo Simulations[J]. Chemical Research in Chinese Universities 2011(02)
• [19].Effect of Sr loading on oxydehydrogenation of propane to propylene over Al_2O_3-supported V-Mo catalysts[J]. Journal of Energy Chemistry 2013(05)
• [20].Research on Ethylene and Propylene Formation during Catalytic Pyrolysis of Methylcyclohexane[J]. China Petroleum Processing & Petrochemical Technology 2012(04)
• [21].On-spec Propylene Delivered During Successful Trial Commissioning of MTP Unit at Shenhua Ningxia Coal Industry Group[J]. China Petroleum Processing & Petrochemical Technology 2011(01)
• [22].CRYSTALLIZATION KINETICS OF ETHYLENE-PROPYLENE COPOLYMERS PREPARED BY LIVING COORDINATION POLYMERIZATION[J]. Chinese Journal of Polymer Science 2008(05)
• [23].Removal of Benzothiophene by Extraction with Deep Eutectic Solvents [Bmim]Br-Polyalcohol[J]. China Petroleum Processing & Petrochemical Technology 2020(03)
• [24].First DCC-plus Unit Comes Online Successfully at IRPC in Thailand[J]. China Petroleum Processing & Petrochemical Technology 2016(03)
• [25].Effects of ammonium exchange and Si/Al ratio on the conversion of methanol to propylene over a novel and large partical size ZSM-5[J]. Journal of Natural Gas Chemistry 2011(03)
• [26].The CHP Process Delivers Qualified Product from Pilot Plant at SINOPEC Shanghai Research Institute of Petrochemical Technology[J]. China Petroleum Processing & Petrochemical Technology 2019(03)
• [27].Fluoride-mediated nano-sized high-silica ZSM-5 as an ultrastable catalyst for methanol conversion to propylene[J]. Journal of Energy Chemistry 2018(04)
• [28].Electrocatalytic Synthesis of Propylene Carbonate from CO_2 and Propylene Oxide[J]. Chemical Research in Chinese Universities 2011(02)
• [29].Role and Mechanism of Functional Components in Promoters for Enhancing FCC Propylene Yield[J]. China Petroleum Processing and Petrochemical Technology 2010(02)
• [30].Package Technology for Manufacture of PO via HPPO Process Developed by SINOPEC Passed Calibration Tests at Full Load[J]. China Petroleum Processing & Petrochemical Technology 2018(03)