ch4

The basic component of natural gas is methane ( CH4 ) .

天然气的基本成分是甲烷。

Their catalytic activities in partial oxidation of CH4 were studied .

研究了催化剂催化CH4部分氧化反应的活性。

In general , with the increase of CH4 concentration , they increase as well .

一般缺陷密度和杂质含量随甲烷浓度的增加而增加；

CH4 emission is a complex process and depends on many factors , with mixed results .

CH4的释放是一个复杂的过程，受到众多因素的影响，导致研究结果不一。

A Proposal for Improving Ion Optics System of the Mass Spectrometer CH4

CH4型质谱计离子光学系统的一个改进方案

Three different aeration ways and several types of CH4 air nozzles were designed .

设计了三种不同的通气方式和几种类型的CH4气体喷嘴，着重探讨了试验工艺条件对碳包覆纳米铝粉制备的影响规律。

CH4 emission and the yield have a large difference for different rice cultivar .

不同水稻品种对稻田CH4排放和水稻的产量有很大的影响。

Quality control of CO2 and CH4 measurement data on China Global Atmosphere Watch baseline Observatory

瓦里关大气本底观象台CO2、CH4观测过程的质量控制

Effect of Soil Eh and Temperature on Seasonal Variation of CH4 Emission from Rice

土壤Eh和温度对稻田甲烷排放季节变化的影响

Litter layer had no distinct impact on CH4 uptake by soil .

凋落物层对该林型地表CH4的吸收没有明显的阻隔作用；

Advancement in research on replacement of CH4 from hydrate with CO_2

CO2置换开采天然气水合物研究进展

Effect of Rice Straw Application Time in Previous Crop Season on CH4 Emission from Rice Paddy Field

前茬季节稻草还田时间对稻田CH4排放的影响

Effects of Different Long-Term Fertilization on Emission of CH4 and N2O from Paddy Soil

长期不同施肥类型对稻田甲烷和氧化亚氮排放速率的影响

Numerical simulation of turbulent jet diffusion ch4 / air flame using joint presumed PDF model

用简化的联合PDF模型计算CH4扩散燃烧

Study on adsorption / desorption character of anthracite in CH4 isotherm experiments

无烟煤对甲烷等温吸附解吸特性实验研究

The results show the optimization of CH4 / O2 molar ratio should be 2 .

计算表明，最佳的CH4/O2比应该在2左右。

Using closed chamber method effects of the different rice - vegetable rotation systems on CH4 emission were studied .

用密闭箱法研究了不同水旱轮作方式对稻田甲烷排放的影响。

The value of CH4 flux is also negative in Leymus chinensis plots .

在羊草样地中，CH4的通量值也为负值。

Continues rising of the atmosphere methane ( CH4 ) aroused worldwide attention .

大气甲烷（CH4）浓度的不断攀升引起了全球范围的关注。

Measurement and Calculation for Infrared Transmittance of CH4

CH4红外透过率的测定与计算

Preparation of Carbon Nanotube Supported Nickel and Its Catalytic Activity in Partial Oxidation of CH4

碳纳米管载镍催化剂的制备及其催化甲烷部分氧化反应活性的研究

The wetland is a huge organic carbon pool and also an important emission source of greenhouse gas CH4 .

湿地是陆地上巨大的有机碳储库，也是温室气体甲烷的重要来源。

These factors exert action through influencing CH4 oxidation bacteria , types , amount , activity and distribution models .

这些因子主要通过影响CH4氧化细菌群、种类、数量、活性及其分布模式产生作用。

Study on the Reduction of Nitric Oxide by CH4 on Supported Co and Ni Oxide Catalysts

担载型钴镍金属氧化物催化剂上CH4还原NO反应研究

CO , H2 , CH4 and short chain hydrocarbons increased with static bed height increasing .

静止床高增加时，有利于CO、H2、CH4以及低碳氢化合物的生成。

Natural gas is a combustible gas which major component is CH4 , and release heat when burning .

天然气由甲烷CH4为主的可燃气体组成，其燃烧时发出热量。

Use this model to calculate the permeation rate and separation factor of C3H8 / CH4 .

并用该数学模型对另一新的混合气体体系C3H8/CH4进行模拟计算，预测丙烷在这一体系中的渗透速率和分离因子的变化趋势。

A Pulse Study of Oxidative Coupling for CH4 on Li2O / MgO

在Li2O／MgO上以脉冲法研究甲烷氧化偶联

A global two-dimensional chemistry model is developed to study long-term trends of methane ( CH4 ) since industrial revolution .

应用初步建立的全球二维大气化学模式，对工业革命以来甲烷的长期变化进行了模拟研究。模式将CH4、CO和NOx排放源方案进行了参数化。

Considerable amount of CH4 is formed as carbon coated Mo is heated in vacuum .

复碳钼在高温时有一定量的CH4形成。