专利助"苏州竞立"腾飞

苏州竞立制氢设备有限公司是一家集科、工、贸为一体，融开发、设计、制造、安装、后续服务功能于一身，具有科学的管理制度、灵活的经营方法、先进的设计理念、成熟的制造工艺和配备齐全生产系统、专业制造制氢设备和氢气回收净化设备的高新技术企业。公司创建于1992年，位于风光秀丽的姑苏城南——苏州市吴中区经济开发区。     

天然气定价机制改革势在必行

天然气产品是关系到国计民生的重要公共产品,因此,长期以来,我国对天然气工业链各环节的价格实行严格的政府管制,并一直沿用计划经济模式,因此在市场经济条件下不能正确体现价值规律的要求,所以调整和改革天然气定价机制势在必行.     

浅谈山西省燃气系统的改造

分析了主要以焦炉煤气为主的原有城市燃气与天然气在诸多性质上的区别,根据燃气系统改造的原则,提出了燃气系统的置换方式及输配系统、调压设施、燃气用具等的改造方法。     

西安市利用陕北天然气的规划与方案

本文概述了西安市天然气供应现状，详细说明了利用陕北天然气规划指导思想、工程规模、供气范围、建设期限和用户发展规划，科学地论述了压力级制和储气量的确定，明确了资金来源、用款计划和材料的采用，重点突出、条理清楚．通过这篇文章，使我们能够全面了解到西安市综合利用陕北天然气的计算和未来发展方向，值得一读．     

制氢催化剂研究进展

随着化石燃料的日趋枯竭和其带来的环境问题，人们迫切需要更有效的利用化石燃料及开发清洁、价廉的新能源．氢以其储量丰富、清洁、高效、便于运输、环境友好等特点在新能源开发中脱颖而出．氢气用于燃料电池，其化学能一电能转化比内燃机高3～4倍，因此欧、美、日等国家投入了大量的人力和财力开发高效燃料电池，并且将此种电源应用于汽车、宇宙飞船和航天飞机．日本电气公司（NEC）已开发出笔记本电脑专用燃料电池．     

天然气和氧偶联制环氧乙烷催化剂的反应性能

研制了天然气和氧经偶联反应制环氧乙烷的Ａｇ－Ｂａ－Ｃｓ／Ａｌ２Ｏ３催化剂（ＮＥＯ－１）。用Ｎ２＋Ｏ２＋Ｃ２Ｈ４和偶联产物气加氧作原料气，在２５０℃，空速２５００ｈ＾－１时，乙烯转化率和ＥＯ选择性分别达到了３０％和８０％，ＮＥＯ－１催化具有适宜的比表面和孔结构，用ＸＰＳ分析发现，与新鲜的催化相比，经活化和反应后的催化剂表面的Ｂａ，Ｃｓ原子浓度增高，并具有较多的吸附氧物种。     

CoOx改性TiO2光催化剂的制备、优化及其光催化分解水析氢性能研究

利用热分解法制备了不同掺杂量的CoO_x-TiO₂系列光催化剂, 并优化了制备方法。在用XRD、TEM和XPS等技术对催化剂表征的基础上，探讨了乙醇作为电子给体时CoO_x改性对P25-TiO₂光催化分解水析氢性能的影响。本文还利用连续瞬态电流-时间响应和循环伏安法等电化学方法，考察了CoO_x-TiO₂改性系列光催化剂光照条件下电流响应强度、起始光电响应特性差别及光催化析氢电位变化等光电化学性能。光催化性能实验结果表明，适当掺杂CoO_x(110～400 ℃焙烧时最佳掺杂量约为0.4wt% Co，500 ℃焙烧时最佳掺杂量约为0.6～0.8wt% Co)能够显著地提高TiO₂析氢光催化性能，产氢速率提高2个数量级。另外在适当温度下的热处理，能够改善催化剂光催化性能(最佳处理温度为300～400 ℃)。光电化学性能评价结果表明，适当掺杂CoO_x和适当温度下焙烧能在催化剂表面形成较多的析氢活性物种——含钴复合物，能有效增强催化剂光电流响应强度，并使得析氢光还原电位向有利于析氢方向位移。高含量掺杂CoO_x会在催化剂表面形成某种碳化物物种，大量含钴复合物活性中心的出现会降低光吸收效率，增加TiO₂表面光生电子-空穴复合率而使催化剂失去析氢光催化性能。     

微波辅助快速制备2D/1D ZnIn2S4/TiO2 S型异质结及其光催化制氢性能

The threat and global concern of energy crises have significantly increased over the last two decades. Because solar light and water are abundant on earth, photocatalytic hydrogen evolution through water splitting has been considered as a promising route to produce green energy. Therefore, semiconductor photocatalysts play a key role in transforming sunlight and water to hydrogen energy. To date, various photocatalysts have been studied. Among them, TiO₂ has been extensively investigated because of its non-toxicity, high chemical stability, controllable morphology, and high photocatalytic activity. In particular, 1D TiO₂ nanofibers (NFs) have attracted increasing attention as effective photocatalysts because of their unique 1D electron transfer pathway, high adsorption capacity, and high photoinduced electron–hole pair transfer capability. However, TiO₂ NFs are considered as an inefficient photocatalyst for the hydrogen evolution reaction (HER) because of their disadvantages such as a large band gap (~3.2 eV) and fast recombination of photoinduced electron–hole pairs. Therefore, the development of a high-performance TiO₂ NF photocatalyst is required for efficient solar light conversion. In recent years, several strategies have been explored to improve the photocatalytic activity of TiO₂ NFs, including coupling with narrow-bandgap semiconductors (such as ZnIn₂S₄). Recently, microwave (MW)-assisted synthesis has been considered as an important strategy for the preparation of photocatalyst semiconductors because of its low cost, environment-friendliness, simplicity, and high reaction rate. Herein, to overcome the above-mentioned limiting properties of TiO₂ NFs, we report a 2D/1D ZnIn₂S₄/TiO₂ S-scheme heterojunction synthesized through a microwave (MW)-assisted process. Herein, the 2D/1D ZnIn₂S₄/TiO₂ S-scheme heterojunction was constructed rapidly by using in situ 2D ZnIn₂S₄nanosheets decorated on 1D TiO₂ NFs. The loading of ZnIn₂S₄ nanoplates on the TiO₂ NFs could be easily controlled by adjusting the molar ratios of ZnIn₂S₄ precursors to TiO₂ NFs. The photocatalytic activity of the as-prepared samples for water splitting under simulated solar light irradiation was assessed. The experimental results showed that the photocatalytic performance of the ZnIn₂S₄/TiO₂ composites was significantly improved, and the obtained ZnIn₂S₄/TiO₂ composites showed increased optical absorption. Under optimal conditions, the highest HER rate of the ZT-0.5 (molar ratio of ZnIn₂S₄/TiO₂= 0.5) sample was 8774 μmol·g^-1·h^-1, which is considerably higher than those of pure TiO₂ NFs (3312 μmol·g^-1·h^-1) and ZnIn₂S₄nanoplates (3114 μmol·g^-1·h^-1) by factors of 2.7 and 2.8, respectively. Based on the experimental data and Mott-Schottky analysis, a possible mechanism for the formation of the S-scheme heterojunction between ZnIn₂S₄ and TiO₂ was proposed to interpret the enhanced HER activity of the ZnIn₂S₄/TiO₂heterojunctionphotocatalysts.      

Reactions in a Mixture of CH4 and CO2 under the Aciton of Microwave Discharge at Atmospheric Pressure

Reactions between CH4 and CO2 under the action of continuous microwave discharge at atmospheric pressure were studied in a special homemade reactor,The main products were CO and H2,while acetylene and ethylene were also found in the products.Experimental results show that conversions of CH4 and CO2 could be higher than 90% without the presence of any catalyst,Effects of CO2/CH4 molar ratio and total flow rate of the feed gas on the reaction were also investigated.     

《天然气化学（英文）》被EI收录

Journal of Natural Gas Chemistry（《天然气化学（英文）》）于2006年被EI（EI工程索引）数据库收录．登录Ei Compendex数据库http：／／www．engineeringvillage2．org．cn可浏览《天然气化学（英文）》2006年以来发表的所有文章的信息．EI数据库侧重提供应用科学和工程领域的文摘索引信息，数据来源于175个学科的5100种工程类期刊、会议论文和技术报告，其影响力与日俱增．《天然气化学（英文）》被EI数据库收录，是对多年来支持我刊的广大作者、读者和审稿专家的回报，也是对我们工作的鼓励．