山西煤化所甲烷直接转化制乙烯中试项目召开论证会

32 化学反应工程与工艺 2019年2月

known?[J]. Applied Catalysis A: General, 2012, 425/426: 53-61.

[16]HOU S, CAO Y, XIONG W, et al. Site requirements for the oxidative coupling of methane on SiO2-supported Mn catalysts[J].

Industrial & Engineering Chemistry Research, 2006, 45(21): 7077-7083.

[17]SHAHRI S M K, ALAVI S M. Kinetic studies of the oxidative coupling of methane over the Mn/Na2WO4/SiO2 catalyst[J]. Journal of

Natural Gas Chemistry, 2009, 18(1): 25-34.

[18]LOMONOSOV V I, GORDIENKO Y A, SINEV M Y, et al. Thermochemical properties of the lattice oxygen in W, Mn-containing

mixed oxide catalysts for the oxidative coupling of methane[J]. Russian Journal of Physical Chemistry A, 2018, 92(3): 430-437.

[19]SINEV M, PONOMAREVA E, SINEV I, et al. Oxygen pathways in oxidative coupling of methane and related processes. case study:

NaWMn/SiO2 catalyst[J]. Catalysis Today, 2019, 333: 36-46.

[20]JI S F, XIAO T C, LI S B, et al. The relationship between the structure and the performance of Na-W-Mn/SiO2 catalysts for the

oxidative coupling of methane[J]. Applied Catalysis A: General, 2002, 225(1/2): 271-284.

Oxidative Coupling of Methane over Na-W-Mn Catalysts Supported by

Ti-Si Molecular Sieves

XIAO Ke1, SONG Lina1,2, CHENG Dangguo1,2, CHEN Fengqiu1,2, ZHAN Xiaoli1,2

1. College of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310027, China;

2. Quzhou Research Institute, Zhejiang University, Quzhou 324000, China

Abstract：A series of Na-W-Mn-loaded catalysts with different supports (Ti-SBA-15, TS-1, Ti-MWW and SiO2) were prepared and tested in the oxidative coupling of methane at different reaction temperatures. The catalysts were characterized by X-ray diffraction (XRD), N2 physical adsorption, temperature-programmed reduction (H2-TPR) and X-ray photoelectron spectroscopy (XPS). The results showed that Na2WO4 and Mn2O3 played a vital role in the reaction. The addition of Ti effectively activates methane was at lower temperature, and improved the migration of active components from the bulk phase to the surface of catalysts. Moreover, Ti-SBA-15 also increased the concentration of surface active phases and surface active oxygen species. Therefore, Na-W-Mn/Ti-SBA-15 showed the better activity, with 22% of CH4 conversion and 63% of C2 selectivity at a low temperature of 720 ℃.

Key words: oxidative coupling of methane; Na-W-Mn; Ti-SBA-15; active phase; Ti doping

栏目编辑 王正宝 ****************************************************************************************************************** 山西煤化所甲烷直接转化制乙烯中试项目召开论证会1月9日，由中科院山西煤化所与潞安集团合作开发的“甲烷直接转化制乙烯关键技术开发与工业中试”项目召开论证会。

山西煤化所团队汇报了甲烷氧化偶联制乙烯技术（以下简称OCM技术）开发与工业中试项目背景及研发进展。专家组一致认为，甲烷直接转化制乙烯是一项变革性的能源化工技术，该技术的突破不仅会形成一条新的乙烯生产途径，同时对于天然气以及煤层气、页岩气等非常规天然气的资源高效利用具有重要战略意义。项目关键技术新型高效OCM催化剂和流化床反应器已取得突破性进展，并完成技术工艺的整体优化设计，形成具有完全自主知识产权的OCM技术体系，前景明朗。

李慧琴摘自中科院山西煤化所，2019-01-10