戊烷管道气是小城镇民用燃气的一种理想气源

发展小城镇、小城镇建设城市化是当今我国农村产业结构和劳动力结构调整与改革的重大举措。为此,小城镇燃气化,取代传统的烧煤、木柴、农禾是人们对物质与精神生活环境的要求,也是小城镇城市化的重要标志之一。对于无天然气资源和财力困难的乡镇,戊烷管道煤气确是一条较好的气化途径。

Effect of operating parameters on coal gasification

Coal combustion and gasification are the processes to utilize coal for production of electricity and many other applications. Global energy demand is increasing day by day. Coal is an abundant source of energy but not a reliable source as it results into high CO2 emissions. Energy industries are expected to decrease the CO2 emission to prevent global warming. Coal gasification is a process that reduces the CO2 emission and emerges as a clean coal technology. Coal gasification process is regulated by several operating parameters. A Number of investigations have been carried out in this direction. A critical review of the work done by several researchers in the field of coal gasification has been compiled in this paper. The effect of several operating parameters such as coal rank, temperature, pressure, porosity, reaction time and catalyst on gasification has been presented here.

Coal geological factors for the storage of gas and coalbed methane resources evaluation research in Liupanshui

The geological characteristics of coalbed methane from the research carried out in Liupanshui is based on analysis of faults, folds, roof and floor lithology, and depth of coal seam gas content, combined with the assessment of CBM resources calculated through buried depth scope, average coal seam thickness, and gas content, organized by the Ministry of Land and Resources in 2006, which launched the ＂national new round of coalbed methane re-sources evaluation＂ project to evaluate the coalbcd methane resources in the standard category and divided coal-bed methane resources into Ⅰ, Ⅱand Ⅲ Category of three resources categories. With this method on the other syncline to resources assessment, the area below 1 000 m is named as ] Category resources. And with the depth increasing, resources level decreases.

Estimation of correction coefficients for measured coal bed methane contents

Improving the accuracy and precision of coal bed methane(CBM) estimates requires correction of older data from older coal exploration surveys to newer standards.Three methods,the depth gradient method,the contour aerial weight method,and the well-point aerial weight method,were used to estimate the correction coefficient required to predict CBM gas content from coal exploration data.The data from the Nos.3 and 15 coal seams provided the coal exploration data while the CBM exploration stages within the X1 well block located in the southern part of the Qinshui Basin provided the data obtained using newer standards.The results show the correction coefficients obtained from the two aerial weight methods are similar in value but lower than the one obtained from the depth gradient method.The three methods provide similar results for the Nos.3 and 15 seams in that the correction factor is lower for the former seam.The results from the depth gradient method taken together with the coal seam burial depth and the coal rank suggest that variations in the correction factor increase linearly along with coal seam burial depth and coal rank.The correlation obtained can be applied to exploration and the evaluation of coal bed gas resources located in coalfields.

SEMI-INDUSTRIAL UCG TRIAL AT XUZHOU XINGHE NO.2 MINE

This paper introduces the results of a semi-industrial UCG trial carried out at Xuzhou Xinghe No. 2 mine. A new underground gasifier, long tunnel. large section underground gasifier, is designed. It is an important way to make LCG cornmercialization because the new gasifier can steadily produce gas with higher heat value by changing the flow state of air and gas in the tunnel.

Study on Production of Hydrogen from Methane for Proton Exchange Membrane Fuel Cell

The hydrogen production from methane for proton exchange membrane fuel cell (PEMFC) was studied experimentally. The conversion rate of methane under different steam carbon ratios, the effect of the different excess air ratios on the constituents of the gas produced, the permeability of hydrogen under different pressure differences, and the effect of different system pressure on the reaction enthalpy of hydrogen were obtained. The results lay the basis for the production of hydrogen applicable to PEMFC, moreover, provide a new way for the comprehensive utilization of the coal bed methane.

Clean Coal Technologies in China： Current Status and Future Perspectives

Coal is the dominant primary energy source in China and the major source of greenhouse gases and air pollutants. To facilitate the use of coal in an environmentally satisfactory and economically viable way, clean coal technologies （CCTs） are necessary. This paper presents a review of recent research and development of four kinds of CCTs： coal power generation; coal conversion; pollution control; and carbon capture, utilization, and storage. It also outlines future perspectives on directions for technology re search and development （R＆D）. This review shows that China has made remarkable progress in the R＆D of CCTs, and that a number of CCTs have now entered into the commercialization stage.

Technological framework of coordinated coal mining and coalbed methane

According to the mining mechanisms of CBM combined with coal structure andthe key technologies of coordinated mining coal and coalbed methane under differentmining coal models, the theoretical foundation of coordinated mining of coal and coalbedmethane was expounded, and the mining models of coordinated mining of coal andcoal-bed methane were classified.This research can provide a reference to safety productionof coal mines and development of CBM resources.

New progress and future prospects of CBM exploration and development in China

Efforts to speed up China's coal bed methane (CBM) exploration developments related to production safety, optimization of energy structures, prevention of energy waste and reduction of greenhouse gas emissions are all of great significance. In order to strengthen CBM exploration and development in China and to encourage increased growth in the CBM industry, we firstly give a general overview of the recent technological innovations and other developments in CBM exploration in the U.S., Canada and other countries. Using this background information as the starting point, we further present observations and analyses of CBM exploration and development, preferential policies, technical support and implications of R&D for CBM development in China. The results show that the problems related to CBM exploration technology development and lack of a complete set of management policies are still the major issues slowing down the growth of domestic CBM industry. Development of resource exploration and technology, R&D and establishment of favorable government policy to support the industry and the creation of a relevant information platform, etc. are finally recommended.

Research on energy structure and development strategy from 2010 to 2015 in Qingdao, China

With the fast development of Qingdao's economy, the energy consumption is increasing significantly. In this paper, based on the energy statistic data in Qingdao area from 2010 to 2015,energy consumption structure was analyzed, indicating the existence of single energy structure;that is, coal, petroleum, and natural gas are dominant in the area. Thus, some issues between energy supply and demand have been brought. To solve present problem, we put forward to formulate the development strategy of energy, including energy savings, the exploitation of petroleum and natural gas resources, the development and utilization of renewable energy sources, and energy policy. It is worthy of mentioning that, according to the geological investigation, the shale gas may be abundant in Qingdao area and the gas resource amount estimated is huge. This is our first finding, important for developing unconventional energy and adjusting the energy structure in Qingdao in the future. Therefore, we suggest that Qingdao government should take action to develop local new energy resources for satisfying the energy demand.

Analysis on Policies of Oil and Gas in China

The Government has actively introduced oil and gas policies to promote the sustainable and healthy development of the industry it, 2017. The purposes of such policies are： to accelerate the reform of mineral resource royalties and advance the competitive transfer of mining rights; to promote the reform of the natural gas price, introduce cost supervision on long-distance natural gas pipeline enterprises in the area of gas pipeline transportation, and strengthen the regulation qf the distribution price; to liberalize the import qf crude oil in an orderly manner, increase the allowable volume of non-state trading crude oil imports, strengthen the supervision and periodically pause the approval of the right to use imported crude oil; and to enhance environmental protection.

Circulating Fluidized Bed Gasification of Low Rank Coal：Influence of O2/C Molar Ratio on Gasification Performance and Sulphur Transformation

To promote the utilization efficiency of coal resources,and to assist with the control of sulphur during gasification and/or downstream processes,it is essential to gain basic knowledge of sulphur transformation associated with gasification performance.In this research we investigated the influence of O_2/C molar ratio both on gasification performance and sulphur transformation of a low rank coal,and the sulphur transformation mechanism was also discussed.Experiments were performed in a circulating fluidized bed gasifier with O_2/C molar ratio ranging from 0.39 to 0.78 mol/mol.The results showed that increasing the O_2/C molar ratio from 0.39 to 0.78 mol/mol can increase carbon conversion from 57.65%to 91.92%,and increase sulphur release ratio from 29.66%to63.11%.The increase of O_2/C molar ratio favors the formation of H_2S,and also favors the retained sulphur transforming to more stable forms.Due to the reducing conditions of coal gasification,H_2S is the main form of the released sulphur,which could be formed by decomposition of pyrite and by secondary reactions.Bottom char shows lower sulphur content than fly ash,and mainly exist as sulphates.X-ray photoelectron spectroscopy(XPS)measurements also show that the intensity of pyrite declines and the intensity of sulphates increases for fly ash and bottom char,and the change is more obvious for bottom char.During CFB gasification process,bigger char particles circulate in the system and have longer residence time for further reaction,which favors the release of sulphur species and can enhance the retained sulphur transforming to more stable forms.