In-situ formation of boehmite and ammonium aluminum carbonate hydroxide for facile synthesis of γ-Al2O3 as industrial catalyst support used for hydrodesulfurization

IF 2.1 3区化学 Q3 CHEMISTRY, MULTIDISCIPLINARY

Journal of Sulfur Chemistry Pub Date : 2025-01-02 DOI:10.1080/17415993.2024.2428605

Azadeh Papan , Amin Mardanloo , Yasin Mehdizadeh Chellehbari

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引用次数: 0

Abstract

Alumina-supported CoMo catalysts have been widely used for hydrodesulfurization of various kinds of feeds. In the current research, γ-Al₂O₃ was synthesized through the simultaneous formation of boehmite and ammonium aluminum carbonate hydroxide (AACH) precursors under controlled pH and temperature conditions. After optimization of the textural properties, γ-Al₂O₃ was utilized as catalyst support for the immobilization of catalytically active species and obtaining CoMo/γ-Al₂O₃-n (concentration of Al(NO₃)₃.9H₂O solutions (n) = 30, 40, 50, 60, 70, 80, 90, and 100 g/L) catalysts via wet impregnation technique. Moreover, this preparation method was applied for the successful large-scale synthesis of CoMo/γ-Al₂O₃-n. The catalyst was characterized by FT-IR, powder X-ray diffraction (XRD), thermogravimetric analysis, inductively-coupled plasma (ICP), scanning electron microscopy (SEM), energy dispersive X-ray (EDX) analysis and Brunauer–Emmett–Teller (BET). The conversion of thiophene over CoMo/γ-Al₂O₃ was studied to assess the catalytic performance. The catalytic activity and stability of our reported catalyst were comparable with that of KATALCO_JM 41-6 T commercial catalyst.

Highlights

Mixture of boehmite and AACH precursors was synthesized by co-precipitation method
The precursors were thermally decomposed to extruded γ-Al₂O₃ as catalyst support
The properties of γ-Al₂O₃ were tuned by various concentrations of Al solution
CoMo/γ-Al₂O₃ was prepared by the impregnation of γ-Al₂O₃ in the Co and Mo solutions
CoMo/γ-Al₂O₃ catalyst was sulfided and used for hydrodesulfurization of thiophene

查看原文本刊更多论文

原位生成薄水铝石和碳酸铝铵氢氧化物，方便合成γ-Al2O3作为工业催化剂载体，用于加氢脱硫

氧化铝负载型CoMo催化剂已广泛应用于各种进料的加氢脱硫。在本研究中，在控制pH和温度的条件下，通过同时生成薄水铝石和碳酸铝铵氢氧化物（AACH）前体来合成γ-Al2O3。优化结构性能后，以γ-Al2O3为催化剂载体，通过湿浸渍法制备CoMo/γ-Al2O3-n (Al（NO3)3.9H2O溶液浓度(n) = 30、40、50、60、70、80、90、100 g/L）催化剂。此外，该制备方法还成功用于CoMo/γ-Al2O3-n的大规模合成。采用红外光谱（FT-IR）、粉末x射线衍射（XRD）、热重分析、电感耦合等离子体（ICP）、扫描电镜（SEM）、能量色散x射线（EDX）分析和布鲁诺尔-埃米特-泰勒（BET）等手段对催化剂进行了表征。研究了噻吩在CoMo/γ-Al2O3上的转化反应，以评价其催化性能。催化剂的催化活性和稳定性与KATALCOJM 41- 6t商用催化剂相当。用共沉淀法合成了薄水铝石和AACH前驱体的混合物，前驱体被热分解成挤压的γ-Al2O3作为催化剂载体，不同浓度的Al溶液调节了γ-Al2O3的性能，将γ-Al2O3浸染在Co和Mo溶液中制备了como /γ-Al2O3催化剂，并将como /γ-Al2O3催化剂硫化用于噻吩的加氢脱硫

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Journal of Sulfur Chemistry CHEMISTRY, MULTIDISCIPLINARY-

CiteScore

4.10

自引率

9.10%

发文量

审稿时长

6-12 weeks

期刊介绍： The Journal of Sulfur Chemistry is an international journal for the dissemination of scientific results in the rapidly expanding realm of sulfur chemistry. The journal publishes high quality reviews, full papers and communications in the following areas: organic and inorganic chemistry, industrial chemistry, materials and polymer chemistry, biological chemistry and interdisciplinary studies directly related to sulfur science. Papers outlining theoretical, physical, mechanistic or synthetic studies pertaining to sulfur chemistry are welcome. Hence the target audience is made up of academic and industrial chemists with peripheral or focused interests in sulfur chemistry. Manuscripts that truly define the aims of the journal include, but are not limited to, those that offer: a) innovative use of sulfur reagents; b) new synthetic approaches to sulfur-containing biomolecules, materials or organic and organometallic compounds; c) theoretical and physical studies that facilitate the understanding of sulfur structure, bonding or reactivity; d) catalytic, selective, synthetically useful or noteworthy transformations of sulfur containing molecules; e) industrial applications of sulfur chemistry; f) unique sulfur atom or molecule involvement in interfacial phenomena; g) descriptions of solid phase or combinatorial methods involving sulfur containing substrates. Submissions pertaining to related atoms such as selenium and tellurium are also welcome. Articles offering routine heterocycle formation through established reactions of sulfur containing substrates are outside the scope of the journal.