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A review on transport of coal seam gas and its impact on coalbed methane recovery

Geoff G.X. WANG, Xiaodong ZHANG, Xiaorong WEI, Xuehai FU, Bo JIANG, Yong QIN

《化学科学与工程前沿（英文）》 2011年 第5卷 第2期   页码 139-161 doi: 10.1007/s11705-010-0527-4

摘要： This paper presents a summary review on mass transport of coal seam gas (CSG) in coal associated with the coalbed methane (CBM) and CO geo-sequestration enhanced CBM (CO -ECBM) recovery and current research advances in order to provide general knowledge and fundamental understanding of the CBM/ECBM processes for improved CBM recovery. It will discuss the major aspects of theory and technology for evaluation and development of CBM resources, including the gas storage and flow mechanism in CBM reservoirs in terms of their differences with conventional natural gas reservoirs, and their impact on CBM production behavior. The paper summarizes the evaluation procedure and methodologies used for CBM exploration and exploitation with some recommendations.

关键词： mass transport     coal seam gas (CSG)     coalbed methane (CBM)     coal     CBM recovery     carbon dioxide storage    

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我国煤层气田地面集输工艺及监测技术研究进展

吴建光,琚宜文,裴红,侯泉林,宋现锋,陈仕林,吴剑峰

《中国工程科学》 2012年 第14卷 第2期   页码 30-37

摘要：

针对我国煤层气田地域特点和煤层气地面低压集输存在的问题，通过实施国家科技重大专项项目,研究提出了集中式与分散式相结合的我国煤层气田地面集输模式，对煤层气田地面集输系统的低压集输工艺、撬装式液化设备、产出水处理与环境保护技术、集输系统自动数据采集和网络化管理等关键技术及科学问题进行了联合攻关，获得了重大技术突破，初步形成了适应我国煤层气产业化特点的地面集输工艺与监测技术体系，研发了一系列低成本、生产安全、经济实用的重要装备和试运行系统，并依托国家煤层气开发示范工程基地进行了实际应用。

关键词： 煤层气开发     低压集输工艺     撬装式液化     产出水处理     自动数据采集与网络化管理    

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山西沁水盆地柿庄北区块3#煤层注入埋藏CO2提高煤层气采收率试验和评价

叶建平,张兵,Sam Wong

《中国工程科学》 2012年 第14卷 第2期   页码 38-44

摘要：

对沁水盆地南部柿庄北区块进行了深煤层注入地质和工程评价，认为柿庄北区块适合进行深煤层注入CO2开采煤层气技术的应用；通过SX-001井的微型先导性试验，对SX-001井的注入前后产气量与产水量、气体成分变化和井底压力变化规律进行了总结。通过现场试验，注入CO2后SX-001井的产气量是注入前的2.45倍；在小于煤岩破裂压力的条件下，每天注入20 t的CO2能够实现顺利注入，并且压力上升速度较慢；注入CO2后，煤岩发生膨胀，局部煤层的渗透率降低，排采一段时间后恢复；在目的煤层中注入的CO2的影响范围内，烃类气体总的置换效率达到14.18 cm3/g。该试验成果证明柿庄北区块通过注入CO2开采煤层气实现了CO2的埋藏，提高了煤层气井的采收率。

关键词： 山西沁水盆地     注入CO2     煤层气     采收率    

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煤层气开发压裂技术在沁水煤田的实践与应用

侯景龙,刘志东,刘建中

《中国工程科学》 2011年 第13卷 第1期   页码 89-92

摘要：

针对煤层气特点以及开发过程中压裂工艺技术存在的问题，研究了一项以套管注入、高排量、活性水携砂为主的煤层气清水压裂配套工艺技术。该技术在山西沁水盆地SH煤田现场应用实践了6口井，并获得成功，压后正处于排水阶段，出气效果明显。

关键词： 煤层气     节理     吸附     清水压裂    

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A multi-scale model for CO

G. X. WANG, X. R. WEI, V. RUDOLPH, C. T. WEI, Y. QIN

《化学科学与工程前沿（英文）》 2009年 第3卷 第1期   页码 20-25 doi: 10.1007/s11705-009-0138-0

摘要： This paper presents a multi-scale model to simulate the multicomponent gas diffusion and flow in bulk coals for CO sequestration enhanced coalbed methane recovery. The model is developed based on a bi-dispersed structure model by assuming that coal consists of microporous micro-particles, meso/macro-pores and open microfractures. The bi-disperse diffusion theory and the Maxwell-Stefan approach were incorporated in the model, providing an improved simulation of the CH —CO /CH —N counter diffusion dynamics. In the model, the counter diffusion process is numerically coupled with the flow of the mixture gases occurring within macro-pores or fractures in coal so as to account for the interaction between diffusion and flow in gas transport through coals. The model was validated by both experimental data from literature and our CO flush tests, and shows an excellent agreement with the experiments. The results reveal that the gas diffusivities, in particular the micro-pore diffusivities are strongly concentration-dependent.

关键词： multi-scale model     gas transport     coal     coalbed methane     CO2 sequestration    

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Dissolved methane in anaerobic effluent: Emission or recovery?

《环境科学与工程前沿（英文）》 2022年 第16卷 第4期 doi: 10.1007/s11783-022-1537-4

摘要： Various anaerobic processes have been explored for the energy-efficient treatment of municipal wastewater. However, dissolved methane in anaerobic effluent appears to be a barrier towards the energy and carbon neutrality of wastewater treatment. Although several dissolved methane recovery methods have been developed, their engineering feasibility and economic viability have not yet been assessed in a holistic manner. In this perspective, we thus intend to offer additional insights into the cost-benefit of dissolved methane recovery against its emission.

关键词： Anaerobic treatment     Municipal wastewater     Dissolved methane     Methane recovery     Carbon emission    

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USING NUTRITIONAL STRATEGIES TO MITIGATE RUMINAL METHANE EMISSIONS FROM RUMINANTS

《农业科学与工程前沿（英文）》 2023年 第10卷 第3期   页码 390-402 doi: 10.15302/J-FASE-2023504

摘要：

● Microbial fermentation in the rumen is a main source of methane emissions.

关键词： nutritional strategy     mitigation     microbe     methane     ruminant    

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Phase I study of CBM.CD19 chimeric antigen receptor T cell in the treatment of refractory diffuse large

《医学前沿（英文）》 2022年 第16卷 第2期   页码 285-294 doi: 10.1007/s11684-021-0843-8

摘要： Anti-CD19 chimeric antigen receptor (CAR) T cell therapy has shown impressive efficacy in treating B-cell malignancies. A single-center phase I dose-escalation study was conducted to evaluate the safety and efficacy of T cells transduced with CBM.CD19 CAR, a second-generation anti-CD19 CAR bearing 4-1BB costimulatory molecule, for the treatment of patients with refractory diffuse large B-cell lymphoma (DLBCL). Ten heavily treated patients with refractory DLBCL were given CBM.CD19 CAR-T cell (C-CAR011) treatment. The overall response rate was 20% and 50% at 4 and 12 weeks after the infusion of C-CAR011, respectively, and the disease control rate was 60% at 12 weeks after infusion. Treatment-emergent adverse events occurred in all patients. The incidence of cytokine release syndrome in all grades and grade≥3 was 90% and 0, respectively, which is consistent with the safety profile of axicabtagene ciloleucel and tisagenlecleucel. Neurotoxicity or other dose-limiting toxicities was not observed in any dose cohort of C-CAR011 therapy. Antitumor efficacy was apparent across dose cohorts. Therefore, C-CAR011 is a safe and effective therapeutic option for Chinese patients with refractory DLBCL, and further large-scale clinical trials are warranted.

关键词： CAR-T cell therapy     refractory diffuse large B-cell lymphoma     cytokine release syndrome     dose-limiting toxicity    

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Acid Orange 7 degradation using methane as the sole carbon source and electron donor

《环境科学与工程前沿（英文）》 2022年 第16卷 第3期 doi: 10.1007/s11783-021-1468-5

摘要：

• AO7 degradation was coupled with anaerobic methane oxidation.

关键词： Azo dyes     AO7 degradation     Anaerobic methane oxidation     Microbial community     ANME-2d    

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Variation characteristics of atmospheric methane and carbon dioxide in summertime at a coastal site in

《环境科学与工程前沿（英文）》 2022年 第16卷 第11期 doi: 10.1007/s11783-022-1574-z

摘要：

● Diurnal patterns of CH4 and CO2 are clearly extracted using EEMD.

关键词： Methane     Carbon dioxide     Diurnal pattern     Ensemble empirical mode decomposition     South China Sea     Sea breeze    

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Enhanced methane production during long-term UASB operation at high organic loads as enabled by the immobilized

《环境科学与工程前沿（英文）》 2022年 第16卷 第6期 doi: 10.1007/s11783-021-1505-4

摘要：

• Fungi enable the constant UASB operation even at OLR of 25.0 kg/(m3×d).

关键词： Anaerobic digestion     Fungi     Methane production     High OLR     Microbial community    

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propionate-oxidizing microflora and its bioaugmentation on anaerobic wastewater treatment for enhancing methane

Chong Liu, Jianzheng Li, Shuo Wang, Loring Nies

《环境科学与工程前沿（英文）》 2016年 第10卷 第4期 doi: 10.1007/s11783-016-0856-8

摘要： Syntrophic propionate-oxidizing microflora B83 was enriched from anaerobic sludge. The bioaugmentation of microflora B83 were evaluated from wastewater treatment. Methane yield and COD removal were enhanced by bioaugmentation of microflora B83. Hydrogen-producing acetogensis was a rate-limiting step in methane fermentation. Methane fermentation process can be restricted and even destroyed by the accumulation of propionate because it is the most difficult to be anaerobically oxidized among the volatile fatty acids produced by acetogenesis. To enhance anaerobic wastewater treatment process for methane production and COD removal, a syntrophic propionate-oxidizing microflora B83 was obtained from an anaerobic activated sludge by enrichment with propionate. The inoculation of microflora B83, with a 1:9 ratio of bacteria number to that of the activated sludge, could enhance the methane production from glucose by 2.5 times. With the same inoculation dosage of the microflora B83, COD removal in organic wastewater treatment process was improved from 75.6% to 86.6%, while the specific methane production by COD removal was increased by 2.7 times. Hydrogen-producing acetogenesis appeared to be a rate-limiting step in methane fermentation, and the enhancement of hydrogen-producing acetogens in the anaerobic wastewater treatment process had improved not only the hydrogen-producing acetogenesis but also the acidogenesis and methanogenesis.

关键词： Anaerobic wastewater treatment     Methane production     Hydrogen-producing acetogenesis     Methanogenesis     Rate-limiting step     Bioaugmentation    

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Progress in developing an innovative lean burn catalytic turbine technology for fugitive methane mitigation

Shi SU, Xinxiang YU

《能源前沿（英文）》 2011年 第5卷 第2期   页码 229-235 doi: 10.1007/s11708-011-0147-9

摘要： Approximately 2.8 × 10 m of methane is emitted per year to the atmosphere from coal mining activities around the world. Mitigation and utilization of the fugitive coal mine methane is very difficult because its concentration is very low and varies from 0.1% to1%, and the methane is contained in a large air flow rate of 150–400 m /s. This paper overviews existing and developing technologies for the mitigation and utilization of the fugitive mine methane, and then presents research progress in developing an innovative lean burn catalytic turbine technology for fugitive methane mitigation and utilization. This turbine system can be powered with about 1% methane in air.

关键词： coal mine methane     mitigation and utilization     lean burn gas turbine     catalytic combustion    

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Transient process of methane-oxygen diffusion flame-street establishment in a microchannel

《能源前沿（英文）》 2022年 第16卷 第6期   页码 988-999 doi: 10.1007/s11708-021-0755-y

摘要： “Flame-street” is an interesting diffusion flame behavior in which a series of flame-segments is separately distributed along the mixing layer in a narrow channel. This experimental phenomenon was experimentally and numerically investigated with the focus on the steady-state, thermo-chemical flame structures in previous literature. In the present paper, the dynamic formation process of a methane-oxygen diffusion flame-street structure was simulated with a reacting flow solver developed based on the open-source framework OpenFOAM. By imposing a certain amount of ignition-energy near the channel outlet, a reaction-kernel was formed and bifurcated. Subsequently, three separate flames were consecutively generated from this kernel and propagated within the channel. The whole process was completed within 15 ms and all the discrete flames were eventually in a steady-state. Interestingly, different propagation features were observed for the three flame segments: The leading flame experienced a flame shape/type change from a tribrachial structure in its fast-propagating phase to a long, trailing diffusion tail after being anchored to the inlet. The successive flame had a much lower propagation speed, keeping its two wing-like (fuel-lean premixed and fuel-rich premixed) structure while moving toward its stabilization location, which was approximately in the middle of the channel. The last flame, after the ignition source was turned-off, was immediately convected a bit downstream, and eventually featured a similar two-branch-like structure as the second one. Moreover, chemical insights for the premixed and diffusion branches of the leading flame were also provided with the change of significance of some key elementary reactions focused on, in order to attain a detailed profiling of the flame-type transition. This paper is a first-ever one discussing the transient formation of flame-streets in literature and is believed to be useful for obtaining a comprehensive understanding of this unique flame characteristics from a dynamic point of view.

关键词： micro-combustion     flame-street     diffusion flame     mixing layer     flame propagation speed    

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ALKALINE PRETREATMENT AND AIR MIXING FOR IMPROVEMENT OF METHANE PRODUCTION FROM ANAEROBIC CO-DIGESTION

《农业科学与工程前沿（英文）》 2023年 第10卷 第3期   页码 424-436 doi: 10.15302/J-FASE-2023506

摘要：

● Integration of alkaline pretreatment and air mixing for co-digestion was validated.

关键词： sodium hydroxide     air injection     cumulative methane yield     kinetic modeling analysis     digestate    

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标题 作者 时间 类型 操作

A review on transport of coal seam gas and its impact on coalbed methane recovery

Geoff G.X. WANG, Xiaodong ZHANG, Xiaorong WEI, Xuehai FU, Bo JIANG, Yong QIN

期刊论文

我国煤层气田地面集输工艺及监测技术研究进展

吴建光,琚宜文,裴红,侯泉林,宋现锋,陈仕林,吴剑峰

期刊论文

山西沁水盆地柿庄北区块3#煤层注入埋藏CO2提高煤层气采收率试验和评价

叶建平,张兵,Sam Wong

期刊论文

煤层气开发压裂技术在沁水煤田的实践与应用

侯景龙,刘志东,刘建中

期刊论文

A multi-scale model for CO

G. X. WANG, X. R. WEI, V. RUDOLPH, C. T. WEI, Y. QIN

期刊论文

Dissolved methane in anaerobic effluent: Emission or recovery?

期刊论文

USING NUTRITIONAL STRATEGIES TO MITIGATE RUMINAL METHANE EMISSIONS FROM RUMINANTS

期刊论文

Phase I study of CBM.CD19 chimeric antigen receptor T cell in the treatment of refractory diffuse large

期刊论文

Acid Orange 7 degradation using methane as the sole carbon source and electron donor

期刊论文

Variation characteristics of atmospheric methane and carbon dioxide in summertime at a coastal site in

期刊论文

Enhanced methane production during long-term UASB operation at high organic loads as enabled by the immobilized

期刊论文

propionate-oxidizing microflora and its bioaugmentation on anaerobic wastewater treatment for enhancing methane

Chong Liu, Jianzheng Li, Shuo Wang, Loring Nies

期刊论文

Progress in developing an innovative lean burn catalytic turbine technology for fugitive methane mitigation

Shi SU, Xinxiang YU

期刊论文

Transient process of methane-oxygen diffusion flame-street establishment in a microchannel

期刊论文

ALKALINE PRETREATMENT AND AIR MIXING FOR IMPROVEMENT OF METHANE PRODUCTION FROM ANAEROBIC CO-DIGESTION

期刊论文