Oxidative Degradation of Lurgi Coal-Gasification Wastewater with Mn2O3, Co2O3, and CuO Catalysts in Supercritical Water

2012 ◽  
Vol 51 (51) ◽  
pp. 16573-16579 ◽  
Author(s):  
Yuzhen Wang ◽  
Shuzhong Wang ◽  
Yang Guo ◽  
Donghai Xu ◽  
Yanmeng Gong ◽  
...  
Keyword(s):  
Supercritical Water ◽  
Coal Gasification ◽  
Oxidative Degradation ◽  
Coal Gasification Wastewater

Effective oxidative degradation of coal gasification wastewater by ozonation: A process study

Chemosphere ◽  
2020 ◽  
Vol 255 ◽  
pp. 126963 ◽  
Author(s):  
Zhiyong Yang ◽  
Yagang Zhang ◽  
Wenjuan Zhu ◽  
Xingjie Zan ◽  
Letao Zhang ◽  
...  
Keyword(s):  
Coal Gasification ◽  
Oxidative Degradation ◽  
Process Study ◽  
Coal Gasification Wastewater

Technical and Economic Analysis of Supercritical Water Oxidation and Biochemical Process for Lurgi Coal Gasification Wastewater Treatment

2013 ◽  
Vol 664 ◽  
pp. 265-269
Author(s):  
Yu Zhen Wang ◽  
Shu Zhong Wang ◽  
Yang Guo ◽  
Dong Hai Xu ◽  
Guang Xin Yu ◽  
...  
Keyword(s):  
Economic Analysis ◽  
Supercritical Water ◽  
Water Oxidation ◽  
Coal Gasification ◽  
Flow Sheet ◽  
Supercritical Water Oxidation ◽  
Biochemical Process ◽  
Technical And Economic Analysis ◽  
Coal Gasification Wastewater ◽  
Operation Cost

The technical and economic analysis of supercritical water oxidation (SCWO) and biochemical process for Lurgi coal gasification wastewater (LCGW) treatment were carried out. The findings include the analysis of flow sheet, effluent quality and operation cost of the two processes. Studies show that the SCWO process is more simply and easier to control than the biochemical process. The effluent treated with SCWO process could reach national discharge standard I (GB 8978-1996) without other pretreatment and advanced processes, and could gain 2.3 yuan RMB/t(LCGW). While the operation cost of biochemical treatment is 41.8 yuan YMB/t(LCGW). The SCWO process shows a unique advantage in both technology and economy and will be a promising technique for LCGW treatment.

Supercritical Water Oxidation of Lurgi Coal Gasification Wastewater and Evaluation of the Combined Process with Gasification

2012 ◽  
Vol 610-613 ◽  
pp. 2203-2210 ◽  
Author(s):  
Yu Zhen Wang ◽  
Shu Zhong Wang ◽  
Yang Guo ◽  
Dong Hai Xu ◽  
Yan Meng Gong ◽  
...  
Keyword(s):  
Supercritical Water ◽  
Water Oxidation ◽  
Coal Gasification ◽  
Batch Reactor ◽  
Supercritical Water Oxidation ◽  
Combined Process ◽  
Technical Feasibility ◽  
Volatile Phenol ◽  
Coal Gasification Wastewater ◽  
Oxygen Ratio

Degradation of Lurgi coal gasification wastewater in supercritical water was investigated in a batch reactor, and a combined process of supercritical water oxidation (SCWO) and gasification was put forward to utilize the material and energy in SCWO effluent. The technical feasibility and economy were evaluated. In the SCWO process, when operated at condition of 500 °C, 25 MPa, oxygen ratio of 3.5 and residence time of 15 min, the concentrations of COD, NH3-N and volatile phenol in effluent reduced to 27, 11 and 0.4 mg/L, respectively, where the removal efficiencies were 99.81%, 99.85% and 99.99%, accordingly. The effluent could reach national discharge standard I (GB 8978-1996), and can be used as the gasification agents of gasifier via a pressure reducer. For a single Lurgi gasifier, the combied process could save 23 t/h of steam and 1550 kg/h of O2, which is equal to 4996 yuan/h.

Removal of nitrogen from coal gasification wastewater by nitrosofication and denitrosofication

1998 ◽  
Vol 38 (1) ◽  
pp. 39-46 ◽  
Author(s):  
Junxin Liu ◽  
Weiguang Li ◽  
Xiuheng Wang ◽  
Hongyuan Liu ◽  
Baozhen Wang
Keyword(s):  
Nitrogen Removal ◽  
Coal Gasification ◽  
Oxygen Demand ◽  
Test Results ◽  
New Process ◽  
Scale Test ◽  
Coal Gasification Wastewater ◽  
Total Nitrogen Removal ◽  
Biological Nitrogen ◽  
Bench Scale Test

In this paper, a study of a new process with nitrosofication and denitrosofication for nitrogen removal from coal gasification wastewater is reported. In the process, fibrous carriers were packed in an anoxic tank and an aerobic tank for the attached growth of the denitrifying bacteria and Nitrobacter respectively, and the suspended growth activated sludge was used in an aerobic tank for the growth of Nitrosomonas. A bench scale test has been carried out on the process, and the test results showed that using the process, 25% of the oxygen demand and 40% of the carbon source demand can be saved, and the efficiency of total nitrogen removal can increase over 10% as compared with a traditional process for biological nitrogen removal.

Study on CO 2 gasification properties of coal gasification wastewater slurry

2021 ◽  
Author(s):  
Jianzhong Liu ◽  
Dedi Li ◽  
Jianbin Wang ◽  
Zhi Chen ◽  
Jun Cheng ◽  
...  
Keyword(s):  
Coal Gasification ◽  
Coal Gasification Wastewater

Roles of coal gasification wastewater in coal electrolysis for hydrogen production

Fuel ◽  
2021 ◽  
Vol 305 ◽  
pp. 121600
Author(s):  
Cong Chen ◽  
Jianzhong Liu ◽  
Hongli Wu ◽  
Jianbin Wang ◽  
Jun Cheng
Keyword(s):  
Hydrogen Production ◽  
Coal Gasification ◽  
Coal Gasification Wastewater
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