MTW European Type Trapezium Mill
Input size:30-50mm
Capacity: 3-50t/h
LM Vertical Roller Mill
Input size:38-65mm
Capacity: 13-70t/h
Raymond Mill
Input size:20-30mm
Capacity: 0.8-9.5t/h
Sand powder vertical mill
Input size:30-55mm
Capacity: 30-900t/h
LUM series superfine vertical roller grinding mill
Input size:10-20mm
Capacity: 5-18t/h
MW Micro Powder Mill
Input size:≤20mm
Capacity: 0.5-12t/h
LM Vertical Slag Mill
Input size:38-65mm
Capacity: 7-100t/h
LM Vertical Coal Mill
Input size:≤50mm
Capacity: 5-100t/h
TGM Trapezium Mill
Input size:25-40mm
Capacity: 3-36t/h
MB5X Pendulum Roller Grinding Mill
Input size:25-55mm
Capacity: 4-100t/h
Straight-Through Centrifugal Mill
Input size:30-40mm
Capacity: 15-45t/h
Coke regeneration treatment
Coke Formation and Regeneration during FeZSM5
2024年4月6日 Successful industrial implementation of MDA requires the advancement of catalyst regeneration processes and a comprehensive understanding of coke formation to enhance catalyst performance Here, we 2023年2月1日 Powdered activated coke has potential application in the field of wastewater treatment due to its good adsorption performance and low cost However, the coke becomes Research on the hydrothermal regeneration of powdered 2024年9月1日 Powdered activated coke was effective for advanced treatment of refractory fractions Acidic fractions showed preferential adsorption compared to neutral fractions Refractory COD removal from biotreated paper ScienceDirectTwo case studies on the deactivation mechanisms of catalysts used for cobalt FischerTropsch and selective catalytic reduction are considered to provide additional depth in the topics of sintering, coking, poisoning, and fouling Heterogeneous Catalyst Deactivation and
Discerning the Location and Nature of Coke Deposition from
2016年11月23日 The formation of carbonaceous deposits (coke) in zeolite pores during catalysis leads to temporary deactivation of catalyst, necessitating regeneration steps, 1996年6月6日 The regeneration of coked fixedbed catalytic reactors has been studied experimentally Different types of coke distribution have been artificially created in order to Regeneration of FixedBed Catalytic Reactors Deactivated by Coke The effects of a sweeping treatment on the activity recovery, coke content, H/C ratio, and kinetics of coke combustion have been studied in the coke deposited on an HZSM5 zeolite The Coke Aging and Its Incidence on Catalyst Regeneration2021年9月25日 The regeneration of an aged industrial hydrodesulfurization catalyst is possible when coupling nonthermal plasma with moderate heating Indeed at 200 °C, applying a low input power (7 W) removes the coke Several Regeneration of an Aged Hydrodesulfurization Catalyst
Regeneration of catalysts deactivated by coke deposition: A review
In this paper, we will review regeneration methods to restore the activity of catalysts deactivated by coke deposition, because this deactivation is of major concern in the petrochemical industry2003年7月18日 The effects of a sweeping treatment on the activity recovery, coke content, H/C ratio, and kinetics of coke combustion have been studied in the coke deposited on an HZSM5 zeoliteCoke Aging and Its Incidence on Catalyst Regeneration2024年9月1日 In comparison with conventional thermal regeneration treatments, ozonation is an insitu regeneration treatment that can be performed in a wastewater treatment plant Regeneration performance of activated coke for elemental mercury removal by microwave and thermal methods Fuel Process Technol, 199 (2020) Refractory COD removal from biotreated paper ScienceDirectDesalination and Water Treatment deswater doi: 105004/dwt202127391 229 (2021) 421–429 July Advanced treatment of printing and dyeing wastewater by activated coke and thermal regeneration of spent activated coke Menghui Zhang, Xue Chen, Hanlu Xu, Hui Dong*Advanced treatment of printing and dyeing wastewater by activated coke
Active coke regeneration mixed vapor treatment method and
There is provided an active coke regeneration mixed vapor treatment method The method comprises the following process steps of: A) performing a first water condensation on a mixed vapor produced during an active coke regeneration process by spray water in a first condensation zone; B) performing a second water condensation on the mixed vapor that is after the first 2023年2月1日 Powdered activated coke has potential application in the field of wastewater treatment due to its good adsorption performance and low cost However, the coke becomes saturated due to the adsorption of pollutants, which renders its regeneration difficult and limits its wider applicabilityResearch on the hydrothermal regeneration of powdered activated coke Download scientific diagram XRD patterns: (a) coked catalyst, (b) after thermal regeneration, (c) after plasma treatment Symbols: γAl2O3, o CoMoO4, × H116Mo12N26O404P from publication XRD patterns: (a) coked catalyst, (b) after thermal regenerationTable 1 Technical indexes of activated coke "Advanced treatment of printing and dyeing wastewater by activated coke and thermal regeneration of spent activated coke" Skip to search form Skip to main content Skip to account menu Semantic Scholar's Logo Advanced treatment of printing and dyeing wastewater by activated coke
Regeneration methods of the ultrafiltration membranes applied in coke
coke oven wastewater treatment Keywords: Coke oven wastewater; Ultrafiltration; Backflushing; Sponge balls; Membrane regeneration 1 Introduction Coke oven plants are a source of many hazardous substances generated during the coal coking process and processing of the final products The size of the wastewater2021年10月1日 There is an increasing tendency to treat coke wastewater through safer ecofriendly methods; therefore, biological methods can be used in an integrated manner with traditional techniques to minimize the use of chemicals and production of sludge to ensure potability, costeffectiveness, and regeneration of treatment materialsCoke wastewater treatment methods: Mini review ScienceDirect2021年7月1日 Advanced treatment of printing and dyeing wastewater by activated coke and thermal regeneration of spent activated coke Menghui Zhang, [ protected] Xue Chen, [ protected] Hanlu Xu, [ protected] Hui Dong, * [ protected] SEP Key Laboratory of Ecoindustry, School of Metallurgy, Northeastern University, Shenyang, Liaoning , China Advanced treatment of printing and dyeing wastewater by activated coke 2024年9月30日 Regeneration of the zeolites restored much of the original surface area and porosity, demonstrating the effectiveness of this treatment in removing most of the coke deposits This different behaviour in the regeneration of the coked zeolites can be attributed to the different degrees of difficulty of coke combustion, which are influenced by the different degrees of Deactivation and regeneration dynamics in hierarchical zeolites: Coke
Regeneration of catalysts deactivated by coke deposition: A review
the coke deposited, catalyst regeneration combined with coke gasification using H2O or CO2 has also been explored Synthesis gas, instead of CO2, is the main product in these regeneration processes [25] In certain cases, nonoxidative treatments, such as H2 sweeping, are used to remove coke from deactivated catalysts [26,27]1990年11月5日 In industrial catalytic processes, coke deposition can cause catalyst deactivation by covering acid sites and/or blocking pores The regeneration of deactivated catalysts, thereby removing the coke and simultaneously restoring the catalytic activity, is highly desiredRegeneration by hydrogen treatment of bifunctional catalysts 2021年9月25日 This study describes the phenomena involved during the regeneration of an aged industrial hydrodesulfurization catalyst (CoMoP/Al2O3) using a nonthermal plasma at a low temperature (200 °C)(PDF) Regeneration of an Aged Hydrodesulfurization Catalyst by 2019年9月1日 Regeneration of spent activated coke using Fenton oxidation The powdered activated coke was found to be effective for the removal of COD from the biological effluent, but disposal cost for the spent activated coke is very high since the produced waste in chemical wastewater treatment plant is regarded as hazardous wastePowdered activated coke for COD removal in the advanced treatment
Powdered activated coke for COD removal in the advanced treatment
2019年9月1日 Powdered activated coke for COD removal in the advanced treatment of mixed chemical wastewaters and regeneration by Fenton oxidation Author links open overlay panel Lu Shen a , Wei Wang a , Tong Li a , Yuezong Cui a , Bin Wang a , Gang Yu a , Xinhua Wang b , Dong Wei b , Jianzhong Xiao b c , Shubo Deng aCoke burning was used as the primary process for regeneration of the PtSn catalyst, followed by oxychlorination treatment as a second process HCl and air were fed into the reactor at a high temperature of 550 °C [ 32 ], after which the Pt 3 Sn alloy was detected by XRDRegeneration of PtSn/Al2O3 Catalyst for Hydrogen ProductionThe variations of the conversion and total coke content as a function of regeneration time is depicted in Fig 1 A rapid increase in the rate of reactivation was observed during the first 05 h, ca 67% of the total coke was removed At ¿ r D2 h, over 93 wt% of the coke was removed A complete removal of coke was reached at ¿ r D6 h The On the Regeneration of Coked HZSM5 Catalysts SinicaRegeneration by coke burningoff Regeneration treatments were performed in a quartz reactor loaded with 03 g of deactivated catalyst The catalyst sample was heated in nitrogen from room temperature to the coke burning temperature (400 or 500 8C)Analysis of coke deposition and study of the variables of regeneration
Role of internal coke for deactivation of ZSM5 catalysts after low
Abstract By treating a deactivated ZSM5 catalyst for the conversion of methanol to hydrocarbons with NO 2, coke deposits can be removed at around 350 °C, which potentially enables catalyst regeneration at 350–400 °C, which is about 200 °C lower compared to a conventional regeneration in oxygen To evaluate the regeneration with NO 2 at 350 °C, the activity of a 2019年11月10日 To overcome the limitation of alkali activation for recycling coke powder, Zou, 2006, Zou, 2008 has reported AC production with coke powder as the additive for flue gas purification and wastewater treatment The mechanical strength of the obtained AC was improved, which rendered an extended service life by resistance to crush and wear during the Activated carbon preparation with the addition of cokemaking by 2016年11月23日 The formation of carbonaceous deposits (coke) in zeolite pores during catalysis leads to temporary deactivation of catalyst, necessitating regeneration steps, affecting throughput, and resulting Discerning the Location and Nature of Coke Deposition from 2021年10月11日 The activated coke is a promising support for catalysts, and it is important to study the performance of the activated coke catalyst on the removal of NOx In the current research, a series of the activated coke LowTemperature Selective Catalytic Reduction
(PDF) Elimination of Coke in an Aged Hydrotreating
2019年9月19日 After 130 minutes of plasma treatment, with P = 30 W, 70% of the coke was removed while more than 40% of the sulfur was still With a common thermal regeneration process, coke burns at 800 K, 2015年12月31日 This review focuses on oxidative treatments for catalyst regeneration, covering the current progress of oxidation treatments and presenting advantages and drawbacks for each methodRegeneration Kinetics of Spent FCC Catalyst via Coke Gasification in 2019年11月21日 The formation of coke as a result of propene transformation at 623 K on zeolites results from a product shape selectivity mechanism of which the products are polyaromatic molecules, such as pyrene (PDF) Impact of the Framework Type on the Regeneration of DOI: 101016/s18722067(20)635525 Corpus ID: ; Regeneration of catalysts deactivated by coke deposition: A review @article{Zhou2020RegenerationOC, title={Regeneration of catalysts deactivated by coke deposition: A review}, author={Jibin Zhou and Jianping Zhao and Jinling Zhang and Tao Zhang and Mao Ye and Zhongmin Liu}, journal={Chinese Journal of Regeneration of catalysts deactivated by coke deposition: A
Regeneration by hydrogen treatment of bifunctional catalysts
1990年11月5日 RESULTS Hydrogen treatment by temperatureprogrammed reaction During heat/hydrogen treatment, coronene impregnated on supported me tallic catalysts may be transformed in three ways: (i) leading to methane pro duction (which can be evaluated by the amount of methane produced), (ii) polymerizing into heavier coke (which can be evaluated by 2021年8月15日 Fig 10 shows the evolution with time on stream of butene conversion and of the yields corresponding to the main olefin fractions (C 5C 7 =, C 8C 11 = and C 12 +) with the fresh catalyst (Fig 10 a) and after a regeneration treatment (Fig 10 b) based on the combustion of coke with a continuous flow of air (40 cm 3 min −1), following a heating ramp of 10 °C min −1 Coke deactivation and regeneration of HZSM5 zeolite catalysts Request PDF On Jan 1, 2022, Zhanyao Li and others published Research on Hydrothermal Regeneration of Powdered Activated Coke in Wastewater Treatment Find, read and cite all the research you Research on Hydrothermal Regeneration of Powdered Activated Coke 2021年8月16日 PDF Coke wastewater production and its treatment is an alarming issue worldwide the regeneration of the adsorbent used [44] in their review wellCoke Wastewater Treatment Methods: Mini Review
Regeneration methods of the ultrafiltration membranes applied in coke
Desalination and Water Treatment wwwdeswaterom doi 10004dwt20212 214 (2021) 120–127 February Regeneration methods of the ultrafiltration membranes applied in coke oven wastewater treatment Anna Trusek*, Maciej Wajsprych, Marcin Tyrka, Andrzej Noworyta2024年9月1日 Refractory COD removal from biotreated paper wastewater using powdered activated coke adsorption technology with ozonation regeneration that react with a variety of organic compounds (Abdedayem et al, 2020) In comparison with conventional thermal regeneration treatments, ozonation is an insitu regeneration Refractory COD removal from biotreated paper ScienceDirect2019年1月25日 Metallurgical coke holds a major importance in the iron and steel industry due to its high calorific values as compared to coal Iron and steel industry utilises metallurgical coke for the reduction of iron ore to pig iron [1, 2]Coal of coking grade is converted into coke by the process of pyrolysis, ie thermal decomposition of organic contents of coal at elevated Role of Advanced Oxidation Process in Treatment of Coke 2021年5月26日 Simultaneous removal of SO 2 and NO x by activated carbon or coke has been successfully demonstrated in flue gas treatment 6,7 An schematic drawing of the process is shown in Fig 1 Figure 1Simultaneous removal of SO2 and NOx from flue gas by low
Nitrogen Chemistry and Coke Transformation of FCC Coked
2016年6月8日 In this paper, the regeneration and associated transient evolution of a commercial FCC spent catalyst in both airfiring and oxyfuel combustion modes (ie 010% O2 in N2 or CO2, 5101000°C, and A method is provided for regeneration of a catalyst comprising a crystalline aluminosilicate zeolite characterized by a silica to alumina mole ratio of at least about 12, a constraint index, as hereinafter defined, within the approximate range of 1 to 12, which catalyst has undergone controlled precoking by exposing the same to a thermally decomposable organic compound at USA Hydrogen regeneration of cokeselectivated 2020年8月7日 Coke formation is a major concern in PDH, where catalyst regeneration is typically achieved by periodic coke burning to achieve sustainable operation In this study, PtSn/Al2O3 catalysts were regenerated after coke burning in three stages: mixing the catalyst with liquid hydrochloric acid, drying, and calcining under air atmosphere[PDF] Regeneration of PtSn/Al2O3 Catalyst for Hydrogen 2014年6月10日 Abstract The influence of temperature (450–500 °C) and time (1–4 h) of coke combustion on the catalytic properties of PtReIn/Al2O3 were studied The results of the cyclohexane dehydrogenation and cyclopentane hydrogenolysis reactions show that the regeneration treatment with diluted oxygen can fully recover the activity of the metal function Influence of Time and Temperature on the Regeneration of
Coke formation, location, nature and regeneration on
1997年8月28日 Coke is mainly polyolefinic in HZSM5(P) (with no treatment) increasing its aromatic character when it is dealuminated by steaming (HZSMS(S)) or steam HC1 treatment (HZSMS(H)) 3 Coke is mainly deposited in the intracrystalline structure of HZSM5(P) and HZSM5(H), although topological isolation or blocking appears when coke content is higher