查询词典 methane

A few years ago, while working at the Department of Agriculture and Food Science in Northern Ireland, we discovered that aging plants provide most of the chloromethane found in the atmosphere. Because methane, like chloromethane, is released during the burning of biomass, we wondered whether intact plants might also release methane.

氯甲烷是一种会破坏臭氧的氯化气体，过去认为主要来自於海洋与森林火灾；几年前，我们任职於北爱尔兰农业与食品科学部时，发现大气中存在的氯甲烷，大多是由腐朽的植物所排放，因为甲烷跟氯甲烷都是在生质燃烧期间释放出来的，於是我们想知道整株植物是否也可能释放甲烷。

The outlets of methane tetrachloride produced in the production facilities of chloromethane in China at present were proposed,such as conversion to diphenyl ketone ,ethylene tetrachloride,cinnamic acid,trichloroacetyl chloride,methane chloride and chloroform.

提出了目前我国氯甲烷生产装置副产的四氯化碳的出路：转化成二苯甲酮、四氯乙烯、肉桂酸、三氯乙酰氯、一氯甲烷、氯仿。

Current estimates are that global methane clathrate deposits contain roughly 20,000 trillion cubic meters of methane, which is twice the amount of all known sources of coal, petroleum, natural gas, and so on.

目前估计全球可燃冰所含的甲烷量约有2万兆立方公尺，大约为目前已知所有煤、石油、天然气等传统化石燃料的2倍。

It has been found that the enveloping line of the average methane content to coal rank develops in the coalification stages, that the remarkable developments of the maximum average methane content coincide gr...

指出不同煤化作用阶段控气作用的实质在于煤物理结构和化学结构的演化，沉积作用控气的思路对煤储层渗透率非均质性预测具有一定实践意义。

According to theory of diffusion and permeation,and theory of adsorpt ion equilibrium of commixture gas,the mechanism of increasing coalbed methane production by gas injection is studied, with which it is illustrated for enhancing energy of storing gas stratum, heightening pressure conduction coefficient of storing gas stratum and binging domino effect of competition adsorption by gas injection, consequently yield and ratio of recovery of coal bed methane are also enhanced.

依据扩散渗流和多组分吸附平衡理论，研究了注气开采煤层气的增产机制。研究表明，注气增加储层能量，提高储层压力传导系数并产生竞争吸附置换效应，从而提高煤层气开采时的单产量及回收率。

Brief Introduction of Enterprise : Hebei Pan's is popular the group subordinate's Pan Uygur environmental protection project limited company is Pan is popular group 97 years in July and the Czechoslovakian Uygur all the branches except infantry prestige plan limited liability company pools capital 3 million US dollar constructing use cow dung to produce the methane, with the methane electricity generation, moors the fluid, moors the dregs production organic fertilizer the energy environmental protection project, at present generates electricity the part to put into service, the organic fat part 2000 square meters produced the host workshop already to complete, the equipment components arrived, went into production completely still must the fund 14 million Yuan.

企业概况：河北潘兴集团下属的潘维环保工程有限公司是潘兴集团97年7月与捷克维特科威策股份有限公司合资300万美元兴建的利用牛粪产生沼气，用沼气发电，沼液、沼渣生产有机肥料的能源环保型项目，目前发电部分已投入运营，有机肥部分2000平米生产主车间已经完成，部分设备已到位，完全投产尚需资金1400万元。进展情况：有机肥2000平米生产车间已完成，部分设备已到位，完成投产尚需资金1400万元。

This paper introduces the basic theory to develop coalbed methane reservoir. It compares coalbed methane reservoir with conventional natural gas reservoir on geology and production characteristics, and explains the storage and migration mechanism in detail. And it also provides a set of new integrated mathematics, numerical model for the simulation of degasification process from coalbed seams. At last, it presents a significant computer software corresponding with the model.

为此，本文从煤层甲烷的开发基础入手，对煤层气藏与常规天然气藏储集特征和开采特征进行了综合对比分析研究；通过对煤层气藏的赋存、运移机理的深入研究，首次建立了一套完整的煤层甲烷运移的数学模型、数值模型，并研制开发了相应的计算机模拟模型，创造性地建立了一套煤层甲烷气藏开发动态评价和预测的理论和方法，对煤层气藏的开发具有重要的实际意义和重要的指导作用。

The paper systematically summarized and reviewed plenty of achievements of rock strata movement and structure evolution, the migration laws of coal-bed methane and degasification methods, it can get that the mining overburden rock fissure patterns and distribution of methane migration law are the theoretical foundation of safety and simultaneous extracting of coal and gas, which are one of the study key points for the future.

论文系统评述了采动覆岩移动与结构演化、煤层瓦斯运移及瓦斯抽采方法的诸多成果，认为覆岩裂隙分布形态及其中瓦斯运移规律是实现煤与瓦斯安全共采的理论基础，也是今后研究重点之一。

Based on the drilling operation of 4 Wells, this article describes the basic characteristic of coalbed methane and technical difficulties in drilling. Some technical keys as borehole quality, fresh Water drilling,fresh water coring, coal-bed methane protection are solved through application of a series of techno1ogical measures such as optimization of rock bit, optimization of drill stem, optimization of drilling parameters and string coring and etc. The experimental performance, especially in fine-grained ...

本文以四口井的施工为例，着重介绍了煤层气井的特点，并指出了钻煤层气井的几个技术难点，通过钻头优选，钻具优选，钻井参数优选，绳索式取心技术等的现场实施和应用，基本解决了井身质量，清水钻井，清水绳索取心，煤层气保护等几个方面的技术难题，文中还介绍了使用中原油田自行设计的中原9508绳索取心工具的取心情况，尤其是在粉煤层地区的取心情况，这将为今后的煤层气开发打下坚实的基础。

The experimental results show that, Mn〓O〓 and Na〓Zr〓, which were cubic crystal and floccule in catalyst surface respectively, were active species, Mn〓O〓 was main active species and addition of Zr further activated methane molecules to improve methane conversion.

分析结果表明，Mn〓O〓和Na〓Zr〓是多组分甲烷氧化偶联催化剂的活性组分，在催化剂表面上分别以立方晶体和絮状物存在，且Mn〓O〓起主要作用，Zr的加入进一步活化了甲烷分子，提高了甲烷的转化率。

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐