Blar i Institutt for kjemisk prosessteknologi på forfatter "He, Xuezhong"
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A Novel Hybrid Digestion-Gasification Process Integrated with Membranes for Efficient Conversion of Biomass to Bio-alcohols
He, Xuezhong (Peer reviewed; Journal article, 2020)There is an urgent need to develop technologies which enable the conversion of biomass into liquid biofuels to fill the gap between limited fossil fuel supplies and increasing worldwide demand. In order to achieve the EU ... -
Novel Tubular Carbon Membranes Prepared from Natural Rattans
He, Xuezhong (Journal article; Peer reviewed, 2019)The novel tubular carbon membranes produced from natural materials are, for the first time, reported. The novelty of this idea is to use natural rattans as precursors for making carbon membranes to address the challenges ... -
Optimization of Deacetylation Process for Regenerated Cellulose Hollow Fiber Membranes
He, Xuezhong (Journal article; Peer reviewed, 2017)Cellulose acetate (CA) hollow fibers were spun from a CA+ Polyvinylpyrrolidone (PVP)/N-methyl-2-pyrrolidone (NMP)/H2O dope solution and regenerated by deacetylation. The complete deacetylation time of 0.5 h was found at a ... -
Optimizing methane recovery: Techno-economic feasibility analysis of N2-selective membranes for the enrichment of ventilation air methane
He, Xuezhong; Lei, Linfeng (Peer reviewed; Journal article, 2020)Utilization of the low concentration methane from coal-mining ventilation air is challenging but can significantly contribute to the mitigation of methane emissions to the atmosphere. This work focuses on the techno-economic ... -
Polymeric membranes and their derivatives for H2/CH4 separation: State of the art
Huang, Liu; Xing, Ziman; Zhuang, Xinyi; Wei, Jing; Ma, Yulei; Wang, Bangda; Jiang, Xia; He, Xuezhong; Deng, Liyuan; Dai, Zhongde (Peer reviewed; Journal article, 2022)The hydrogen economy becomes an important route in approaching carbon neutrality. Compared to conventional methods, membrane separation possesses combined merits, including energy-saving, convenience, and economic efficiency. ... -
Polyvinylamine based Facilitated Transport Membranes for Post-combustion CO2 Capture: Challenges and Perspectives from Materials to Processes
He, Xuezhong (Peer reviewed; Journal article, 2020)This review highlights recent developments and future perspectives on CO2 capture from power plants and energy-intensive industries to reduce CO2 emissions. Different types of membrane materials for CO2 capture were reviewed ... -
Post-combustion carbon capture technologies: Energetic analysis and life cycle assessment
Zhang, Xiangping; Singh, Bhawna; He, Xuezhong; Gundersen, Truls; Deng, Liyuan; Zhang, Suojiang (Journal article; Peer reviewed, 2014)An integrated framework focusing on the energetic analysis and environmental impacts of a CO2 capture and storage (CCS) system is presented, in which the process simulation method and the life cycle assessment (LCA) method ... -
Preparation of Carbon Molecular Sieve Membranes with Remarkable CO2/CH4 Selectivity for High-pressure Natural Gas Sweetening
Lei, Linfeng; Lindbråthen, Arne; Zhang, Xiangping; Favvas, Evangelos P.; Sandru, Marius; Hillestad, Magne; He, Xuezhong (Peer reviewed; Journal article, 2020)Carbon hollow fiber membranes (CHFMs) were fabricated based on cellulose hollow fiber precursors spun from a cellulose/ionic liquid system. By a thermal treatment on the precursors using a preheating process before ... -
Process Simulation and Cost Evaluation of Carbon Membranes for CO2 Removal from High-Pressure Natural Gas
Chu, Yunhan; He, Xuezhong (Journal article; Peer reviewed, 2018)Natural gas sweetening is required to remove the acid gas CO2 to meet gas grid specifications. Membrane technology has a great potential in this application compared to the state-of-the-art amine absorption technology. ... -
Screening Cellulose Spinning Parameters for Fabrication of Novel Carbon Hollow Fiber Membranes for Gas Separation
Lei, Linfeng; Lindbråthen, Arne; Hillestad, Magne; Sandru, Marius; Evangelos, Favvas; He, Xuezhong (Journal article; Peer reviewed, 2019)Novel carbon hollow fiber membranes (CHFMs) have been, for the first time, prepared from cellulose precursors directly spun with a cellulose/(1-ethyl-3-methylimidazolium acetate (EmimAc) + dimethyl sulfoxide (DMSO)) system. ... -
Simulation, optimization and mathematical modelling of a hybrid membrane system for natural gas dehydration and CO2 removal
Helmersen, Inger Anna (Master thesis, 2020)Membraner aksepteres i økende grad som metode for naturgassrensing ettersom etterspørselen etter naturgass øker og strengere klima- og utslippsregler innføres. I denne rapporten, har et hybrid membransystem for fjerning ... -
Spinning Cellulose Hollow Fibers Using 1-Ethyl-3-methylimidazolium Acetate–Dimethylsulfoxide Co-Solvent
Lei, Linfeng; Lindbråthen, Arne; Sandru, Marius; Gutierrez, Maria Teresa Guzman; Zhang, Xiangping; Hillestad, Magne; He, Xuezhong (Journal article; Peer reviewed, 2018)The mixture of the ionic liquid 1-ethyl-3-methylimidazolium acetate (EmimAc) and dimethylsulfoxide (DMSO) was employed to dissolve microcrystalline cellulose (MCC). A 10 wt % cellulose dope solution was prepared for spinning ... -
Strategy Combining Free Volume Theory and Fragment Contribution Corresponding State Method for Predicting Viscosities of Ionic Liquids
Tu, Wenhui; Zeng, Shaojuan; Zhang, Xiaochun; He, Xuezhong; Liu, Lei; Zhang, Suojiang; Zhang, Xiangping (Journal article; Peer reviewed, 2019)In this study, we proposed a strategy that combines the fragment contribution corresponding states (FCCS) and free volume theory (FVT) method, namely FCCS–FVT, to calculate the viscosities of ionic liquids (ILs) covering ... -
Testing and Optimization of PVAm/PVA Blend Membranes for Biogas Upgrading
Berstad, Eivind (Master thesis, 2012)Membrane technology is an energy saving, environment friendly and low cost separation technology. This master’s thesis has focused on testing and optimization of polyvinylamine/polyvinylalcohol (PVAm/PVA) blend fixed-site-carrier ...