The Experts below are selected from a list of 24 Experts worldwide ranked by ideXlab platform
Yu Qian - One of the best experts on this subject based on the ideXlab platform.
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Process development simulation and industrial implementation of a new coal gasification wastewater treatment installation for phenol and ammonia removal
Industrial & Engineering Chemistry Research, 2010Co-Authors: Yun Chen, Dachun Feng, Yu QianAbstract:Coal-gasification wastewater poses serious problems in the Lurgi Process. It cannot be easily purified, as the high pH value of the wastewater limits the dephenolization efficiency of extraction. This work proposes a new Process to remove ammonia and sour gas in order to reduce the pH value of the wastewater from 9 to below 7, and next to remove phenol with solvent extraction under acidic conditions. This new Process consists of a wastewater stripper with side-draw to remove ammonia and sour gas, an extractor to remove phenol, and two distillation columns to recover extractant. Process simulation was conducted to study the performance of the new Process and to perform a detailed design. The complex multicomponent system NH3−CO2−H2S−NaOH−phenol−H2O was analyzed when simulating the wastewater stripping. The new Process has been successfully implemented in an industrial installation for coal-gasification wastewater treatment with a capacity of 2000 tons/day. Satisfactory agreement was obtained between the si...
Yun Chen - One of the best experts on this subject based on the ideXlab platform.
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Process development simulation and industrial implementation of a new coal gasification wastewater treatment installation for phenol and ammonia removal
Industrial & Engineering Chemistry Research, 2010Co-Authors: Yun Chen, Dachun Feng, Yu QianAbstract:Coal-gasification wastewater poses serious problems in the Lurgi Process. It cannot be easily purified, as the high pH value of the wastewater limits the dephenolization efficiency of extraction. This work proposes a new Process to remove ammonia and sour gas in order to reduce the pH value of the wastewater from 9 to below 7, and next to remove phenol with solvent extraction under acidic conditions. This new Process consists of a wastewater stripper with side-draw to remove ammonia and sour gas, an extractor to remove phenol, and two distillation columns to recover extractant. Process simulation was conducted to study the performance of the new Process and to perform a detailed design. The complex multicomponent system NH3−CO2−H2S−NaOH−phenol−H2O was analyzed when simulating the wastewater stripping. The new Process has been successfully implemented in an industrial installation for coal-gasification wastewater treatment with a capacity of 2000 tons/day. Satisfactory agreement was obtained between the si...
Dachun Feng - One of the best experts on this subject based on the ideXlab platform.
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Process development simulation and industrial implementation of a new coal gasification wastewater treatment installation for phenol and ammonia removal
Industrial & Engineering Chemistry Research, 2010Co-Authors: Yun Chen, Dachun Feng, Yu QianAbstract:Coal-gasification wastewater poses serious problems in the Lurgi Process. It cannot be easily purified, as the high pH value of the wastewater limits the dephenolization efficiency of extraction. This work proposes a new Process to remove ammonia and sour gas in order to reduce the pH value of the wastewater from 9 to below 7, and next to remove phenol with solvent extraction under acidic conditions. This new Process consists of a wastewater stripper with side-draw to remove ammonia and sour gas, an extractor to remove phenol, and two distillation columns to recover extractant. Process simulation was conducted to study the performance of the new Process and to perform a detailed design. The complex multicomponent system NH3−CO2−H2S−NaOH−phenol−H2O was analyzed when simulating the wastewater stripping. The new Process has been successfully implemented in an industrial installation for coal-gasification wastewater treatment with a capacity of 2000 tons/day. Satisfactory agreement was obtained between the si...
Danaalexandra Ciupageanu - One of the best experts on this subject based on the ideXlab platform.
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researches on biofuels gasification using the Lurgi Process with homogeneous air inlet over the combustion space
E3S Web of Conferences, 2020Co-Authors: Gheorghe Lazaroiu, Lucian Mihaescu, Gabriel Negreanu, Iulia Simion, Danaalexandra CiupageanuAbstract:The experimental investigations carried out within the present research focus on a simple gasification technology dedicated to biofuels conversion according to the Lurgi procedure. Specifically, an installation with a fixed grill and a homogeneous distribution of the air inlet over the combustion space are considered. In order to provide a thorough background for the experimental research, this paper presents first the challenges related to the air distribution. If for coal gasification the difficulty of the homogeneous penetration of the air inlet within the whole combustion volume is balanced by the possibility of the direct emission of CO valorization, for biomass gasification this factor becomes fundamental. The original contribution of the technology introduced in this paper assumes an improved combustion Process for Lurgi-type gas generators. The experimental installation employed has a particular design, enabling a homogeneous distribution of the air inlet over the entire combustion zone, up to the top of the embers layer. This allows achieving a maximum CO2 content in the flue gas flux, effectively reducing it inside the embers bed. The high calorific value of biofuels used favors developing an efficient combustion Process, occurring at high temperatures. Thus, the reduction Process of the CO2 is self-controlled. The experimental installation operates at a slow fuel rate, with discontinued supply and precise airflow control. The quality of the gas obtained is evaluated based on the resulting open flame, analyzing its composition.
Mohammad Syazwan Bin Onn, Mohammad Syazwan - One of the best experts on this subject based on the ideXlab platform.
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Impact of Chemical Transformations to the Surface of Cu/ZnO/Al2O3 Methanol Catalyst on Lurgi Reactor Output
Universiti Teknologi Petronas, 2011Co-Authors: Mohammad Syazwan Bin Onn, Mohammad SyazwanAbstract:Methanol is the bulk feedstock for chemical industry and nowadays emerges as a suitable environmental friendly fuel. Conventional Lurgi Process of methanol producing from synthesis gas employs Cu/ZnO catalyst which, however, shows a steady deterioration of chemical and mechanical properties. This deterioration affects the production of methanol, especially during the third year of the catalyst operation. In this study, comparisons are made on the catalyst surface in order to determine the causes of the catalyst deterioration based on real industrial Process condition between Sud Chemie’s fresh commercial catalyst and the second-year in operation commercial catalyst. The operating condition of the methanol synthesis based on Lurgi technology is 250°C and 30 bar [2]. The surface morphology of the catalyst was visualized by Field Emission Scanning Electron Microscopy/Energy Dispersive X-ray Analysis and X-ray Photoelectron Spectroscopy. The information obtained from this research will be used to develop a model of poisoning catalyst deactivation
