WO3 nanomaterials synthesized via a sol-gel method and calcination for use as a CO gas sensor
Diah SUSANTI,A.A. Gede Pradnyana DIPUTRA,Lucky TANANTA,Hariyati PURWANINGSIH,George Endri KUSUMA,Chenhao WANG,Shaoju SHIH,Yingsheng HUANG
《化学科学与工程前沿(英文)》
2014年
第8卷
第2期
页码 179-187
doi:
10.1007/s11705-014-1431-0
摘要:
Carbon monoxide is a poisonous and hazardous gas and sensitive sensor devices are needed to prevent humans from being poisoned by this gas. A CO gas sensor has been prepared from WO synthesized by a sol-gel method. The sensor chip was prepared by a spin-coating technique which deposited a thin film of WO on an alumina substrate. The chip samples were then calcined at 300, 400, 500 or 600 °C for 1 h. The sensitivities of the different sensor chips for CO gas were determined by comparing the changes in electrical resistance in the absence and presence of 50 ppm of CO gas at 200 °C. The WO calcined at 500 °C had the highest sensitivity. The sensitivity of this sensor was also measured at CO concentrations of 100 ppm and 200 ppm and at operating temperatures of 30 and 100 °C. Thermogravimetric analysis of the WO calcined at 500 °C indicated that this sample had the highest gas adsorption capacity. This preliminary research has shown that WO can serve as a CO gas sensor and that is should be further explored and developed.
关键词:
WO3 nanomaterial
sol-gel
calcinations
CO gas sensor
sensitivity
CO, N, and CO/N mixed gas injection for enhanced shale gas recovery and CO geological storage
《能源前沿(英文)》
2023年
第17卷
第3期
页码 428-445
doi:
10.1007/s11708-023-0865-9
摘要:
In this work, using fractured shale cores, isothermal adsorption experiments and core flooding tests were conducted to investigate the performance of injecting different gases to enhance shale gas recovery and CO2 geological storage efficiency under real reservoir conditions. The adsorption process of shale to different gases was in agreement with the extended-Langmuir model, and the adsorption capacity of CO2 was the largest, followed by CH4, and that of N2 was the smallest of the three pure gases. In addition, when the CO2 concentration in the mixed gas exceeded 50%, the adsorption capacity of the mixed gas was greater than that of CH4, and had a strong competitive adsorption effect. For the core flooding tests, pure gas injection showed that the breakthrough time of CO2 was longer than that of N2, and the CH4 recovery factor at the breakthrough time () was also higher than that of N2. The of CO2 gas injection was approximately 44.09%, while the of N2 was only 31.63%. For CO2/N2 mixed gas injection, with the increase of CO2 concentration, the increased, and the for mixed gas CO2/N2 = 8:2 was close to that of pure CO2, about 40.24%. Moreover, the breakthrough time of N2 in mixed gas was not much different from that when pure N2 was injected, while the breakthrough time of CO2 was prolonged, which indicated that with the increase of N2 concentration in the mixed gas, the breakthrough time of CO2 could be extended. Furthermore, an abnormal surge of N2 concentration in the produced gas was observed after N2 breakthrough. In regards to CO2 storage efficiency (), as the CO2 concentration increased, also increased. The of the pure CO2 gas injection was about 35.96%, while for mixed gas CO2/N2 = 8:2, was about 32.28%.
关键词:
shale gas
gas injection
competitive adsorption
enhanced shale gas recovery
CO2 geological storage
Catalytic performance of Co-Mo-Ce-K/γ-Al
Yuqiong ZHAO, Yongfa ZHANG
《化学科学与工程前沿(英文)》
2010年
第4卷
第4期
页码 457-460
doi:
10.1007/s11705-010-0524-7
摘要:
The catalytic performance of Co-Mo-Ce-K/γ-Al O catalyst for the shift reaction of CO in coke oven gas is investigated using X-ray diffraction (XRD) and temperature-programmed reduction (TPR). The results indicate that Ce and K have a synergistic effect on promoting the catalytic activity, and the Co-Mo-Ce-K/γ-Al O catalyst with 3.0 wt-% CeO and 6.0 wt-% K O exhibits the highest activity. CeO favors Co dispersion and mainly produces an electronic effect. TPR characterization results indicate that the addition of CeO -K O in the Co-Mo-Ce-K/γ-Al O catalyst decreases the reduction temperature of active components, and part of octahedrally coordinated Mo transforms into tetrahedrally coordinated Mo , which has a close relationship with the catalytic activity.
关键词:
coke oven gas
water gas shift reaction
sulfur-tolerant catalyst
cerium dioxide
Greenhouse gas emissions during co-composting of cattle feedlot manure with construction and demolition
Xiying Hao, Francis J. Larney
《环境科学与工程前沿(英文)》
2017年
第11卷
第3期
doi:
10.1007/s11783-017-0955-1
摘要:
Manure management strategies should reflect current animal feeding practices and encourage recycling of organic waste to help protect our environment. This research investigated greenhouse gas (GHG) emissions during cattle manure stockpiling or composting with and without construction and demolition (C&D) waste. Manure was collected from cattle fed a typical finishing diet (CK manure) and from cattle on diets which included 30% dried distillers grains with solubles (DG manure). The CK and DG manures were co-composted with (4:1) C&D waste (treatments: CK_CD DG_CD), composted alone (treatments: CK and DG) in 13 m bins or stockpiled without C&D waste (treatments: CK_ST and DG_ST) for 99 days. Manure type (CK vs. DG manure) had no effect on GHG emissions over the 99 day manure composting or stockpiling. Composting with C&D waste produced similar CO emissions, about double that from manure stockpiling (7.0 kgC·m ). In contrast, CH emissions were reduced by the inclusion of C&D waste (64 gC·m with C&D vs. 244 gC·m without C&D) while the manure stockpile emitted the greatest amount of CH (464 gC·m ). Additionally, only 0.48% of C was emitted in CH form with C&D waste, compared to 1.68% when composting without C&D waste and 7.00% when cattle manure was stockpiled. The N O emissions (12.4 to 18.0 gN·m ) were similar across all treatments. The lower CH emissions with C&D waste are beneficial in reducing overall GHG emissions from manure composting, while reducing the amount of material entering landfills.
关键词:
Livestock manure
greenhouse gas flux
straw bale compost bin
N2O
CH4
CO2
Lagrangian simulation of deposition of CO gas-solid sudden expansion flow
HUANG Dongping, DING Guoliang, QUACK Hans
《能源前沿(英文)》
2008年
第2卷
第2期
页码 216-221
doi:
10.1007/s11708-008-0032-3
摘要:
Freezing and blockage resulting from the deposition of solid CO formed because of sudden expansion of the downstream pipe during the release of CO through safety valves, will endanger the protected equipment. To overcome this problem, the characteristics of the CO gas-solid sudden expansion flow are studied by using the disperse Lagrangian model. A comparison of the calculated deposition of the solid CO with the experimental results shows that they are in reasonable agreement. The simulation results show that the size of the solid CO formed should not be in the range of 0.04–0.07 mm ( number 3.2–9.8). This can be achieved by using an appropriate flow cross section of the safety valve.
关键词:
comparison
gas-solid
downstream
blockage
Lagrangian
Review on cryogenic technologies for CO removal from natural gas
Yujing BI, Yonglin JU
《能源前沿(英文)》
2022年
第16卷
第5期
页码 793-811
doi:
10.1007/s11708-022-0821-0
摘要:
CO2 in natural gas (NG) is prone to condense directly from gas to solid or solidify from liquid to solid at low temperatures due to its high triple point and boiling temperature, which can cause a block of equipment. Meanwhile, CO2 will also affect the calorific value of NG. Based on the above reasons, CO2 must be removed during the NG liquefaction process. Compared with conventional methods, cryogenic technologies for CO2 removal from NG have attracted wide attention due to their non-polluting and low-cost advantages. Its integration with NG liquefaction can make rational use of the cold energy and realize the purification of NG and the production of by-product liquid CO2. In this paper, the phase behavior of the CH4-CO2 binary mixture is summarized, which provides a basis for the process design of cryogenic CO2 removal from NG. Then, the detailed techniques of design and optimization for cryogenic CO2 removal in recent years are summarized, including the gas-liquid phase change technique and the gas-solid phase change technique. Finally, several improvements for further development of the cryogenic CO2 removal process are proposed. The removal process in combination with the phase change and the traditional techniques with renewable energy will be the broad prospect for future development.
关键词:
cryogenic CO2 removal
purification of natural gas (NG)
biogas upgrading
CH4-CO2 binary system
Experimental study on capturing CO 2 greenhouse gas by mixture of ammonia and soil
Ying WU, Yifei WANG, Qinghua ZENG, Xin GONG, Zunhong YU,
《化学科学与工程前沿(英文)》
2009年
第3卷
第4期
页码 468-473
doi:
10.1007/s11705-009-0257-7
摘要:
This paper presents our study on removal of carbon dioxide (CO) greenhouse gas emissions by using the mixture of ammonia and soil. CO capture capacity using this method is 15% higher than the sum of ammonia chemical absorption capacity and soil physical adsorption capacity. Scanning electron microscopy (SEM) and Fourier transform infrared spectroscopy (FTIR) are utilized to study this synergism. The removal effect is not only reflected in ammonia chemical reaction with CO. CO can also be absorbed by ammonium bicarbonate (NHHCO) crystal, which is the main component of the product, or wrapped in the pore of the crystal or packed in the gap between the crystal and the soil. CO can be permanently deposited as carbonated minerals in the subsoil earth layers.
关键词:
electron microscopy
product
physical adsorption
capacity
spectroscopy
标题
作者
时间
类型
操作
WO3 nanomaterials synthesized via a sol-gel method and calcination for use as a CO gas sensor
Diah SUSANTI,A.A. Gede Pradnyana DIPUTRA,Lucky TANANTA,Hariyati PURWANINGSIH,George Endri KUSUMA,Chenhao WANG,Shaoju SHIH,Yingsheng HUANG
期刊论文
CO, N, and CO/N mixed gas injection for enhanced shale gas recovery and CO geological storage
期刊论文
自然对流气体的摆特性及其在传感器中应用
张福学
期刊论文
Catalytic performance of Co-Mo-Ce-K/γ-Al
Yuqiong ZHAO, Yongfa ZHANG
期刊论文
Greenhouse gas emissions during co-composting of cattle feedlot manure with construction and demolition
Xiying Hao, Francis J. Larney
期刊论文
Lagrangian simulation of deposition of CO gas-solid sudden expansion flow
HUANG Dongping, DING Guoliang, QUACK Hans
期刊论文
页岩气网络设计与运行之间的相互作用,包括CO2固存
Sharifzadeh Mahdi, Xingzhi Wang, Nilay Shah
期刊论文
Review on cryogenic technologies for CO removal from natural gas
Yujing BI, Yonglin JU
期刊论文
Experimental study on capturing CO 2 greenhouse gas by mixture of ammonia and soil
Ying WU, Yifei WANG, Qinghua ZENG, Xin GONG, Zunhong YU,
期刊论文
Corrigendum to “Interactions between the Design and Operation of Shale Gas Networks, IncludingCO2 Sequestration” [Engineering (2017) 244–256]
Mahdi Sharifzadeh,Xingzhi Wang,Nilay Shah
期刊论文
温室气体提高采收率的资源化利用及地下埋存
沈平平,江怀友
期刊论文
普光气田地面集输系统的内腐蚀控制与监测
欧莉,李时杰,苏国丰
期刊论文
南海富碳天然气直接利用技术发展研究
吴青,于广欣,汤晓玲,张亮亮,郑裕国
期刊论文
油气田监测高性能微传感器及数字化系统
赵玉龙,牛 喆,周冠武,赵立波,蒋庄德
期刊论文