Ralf Köpsel

513 total citations
12 papers, 451 citations indexed

About

Ralf Köpsel is a scholar working on Biomedical Engineering, Materials Chemistry and Mechanical Engineering. According to data from OpenAlex, Ralf Köpsel has authored 12 papers receiving a total of 451 indexed citations (citations by other indexed papers that have themselves been cited), including 8 papers in Biomedical Engineering, 5 papers in Materials Chemistry and 4 papers in Mechanical Engineering. Recurrent topics in Ralf Köpsel's work include Thermochemical Biomass Conversion Processes (6 papers), Thermal and Kinetic Analysis (3 papers) and Advanced Combustion Engine Technologies (3 papers). Ralf Köpsel is often cited by papers focused on Thermochemical Biomass Conversion Processes (6 papers), Thermal and Kinetic Analysis (3 papers) and Advanced Combustion Engine Technologies (3 papers). Ralf Köpsel collaborates with scholars based in Germany and Poland. Ralf Köpsel's co-authors include Judith Friebel, P. Streubel, R. Hesse, Thomas de Lange, Κ. Wiesener, K. Schwabe, M Beer and Dieter Naumann and has published in prestigious journals such as Carbon, Electrochimica Acta and Fuel.

In The Last Decade

Ralf Köpsel

12 papers receiving 442 citations

Peers — A (Enhanced Table)

Peers by citation overlap · career bar shows stage (early→late) cites · hero ref

Name	h						Papers	Cites
Ralf Köpsel Germany	6	225	142	97	93	82	12	451
Katsuhisa Maruyama Japan	9	258 1.1×	174 1.2×	165 1.7×	110 1.2×	147 1.8×	13	684
Judith Friebel Germany	4	138 0.6×	96 0.7×	75 0.8×	92 1.0×	49 0.6×	8	353
A. Koch France	14	182 0.8×	381 2.7×	125 1.3×	94 1.0×	51 0.6×	20	647
Philippe Chambrion Japan	11	158 0.7×	258 1.8×	106 1.1×	42 0.5×	21 0.3×	12	428
E.A. Heintz United States	13	239 1.1×	226 1.6×	272 2.8×	65 0.7×	78 1.0×	27	608
Juan Qian China	12	411 1.8×	151 1.1×	234 2.4×	40 0.4×	54 0.7×	21	648
Hengfu Shui China	14	325 1.4×	151 1.1×	141 1.5×	184 2.0×	94 1.1×	31	598
Sabino R. Moinelo Spain	16	255 1.1×	122 0.9×	304 3.1×	40 0.4×	59 0.7×	36	611
Concepción Salinas-Martı́nez de Lecea Spain	13	286 1.3×	524 3.7×	282 2.9×	67 0.7×	19 0.2×	20	681
Xinfu He China	16	260 1.2×	246 1.7×	180 1.9×	158 1.7×	90 1.1×	30	696

Countries citing papers authored by Ralf Köpsel

Since Specialization

Citations

This map shows the geographic impact of Ralf Köpsel's research. It shows the number of citations coming from papers published by authors working in each country. You can also color the map by specialization and compare the number of citations received by Ralf Köpsel with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites Ralf Köpsel more than expected).

Fields of papers citing papers by Ralf Köpsel

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by Ralf Köpsel. Nodes represent research fields, and links connect fields that are likely to share authors. Colored nodes show fields that tend to cite the papers produced by Ralf Köpsel. The network helps show where Ralf Köpsel may publish in the future.

Co-authorship network of co-authors of Ralf Köpsel

This figure shows the co-authorship network connecting the top 25 collaborators of Ralf Köpsel. A scholar is included among the top collaborators of Ralf Köpsel based on the total number of citations received by their joint publications. Widths of edges represent the number of papers authors have co-authored together. Node borders signify the number of papers an author published with Ralf Köpsel. Ralf Köpsel is excluded from the visualization to improve readability, since they are connected to all nodes in the network.

All Works

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12 of 12 papers shown

1.

Friebel, Judith, et al.. (1999). Change of chemical bonding of nitrogen of polymeric N-heterocyclic compounds during pyrolysis. Carbon. 37(12). 1965–1978. 230 indexed citations

2.

Friebel, Judith & Ralf Köpsel. (1999). The fate of nitrogen during pyrolysis of German low rank coals — a parameter study. Fuel. 78(8). 923–932. 93 indexed citations

3.

Köpsel, Ralf, et al.. (1997). Catalytic influence of ash elements on NOx formation in char combustion under fluidized bed conditions. Fuel. 76(4). 345–351. 59 indexed citations

4.

Köpsel, Ralf, et al.. (1993). Mathematical model for the gasification of coal under pressure. Fuel. 72(5). 714–714. 3 indexed citations

5.

Köpsel, Ralf, et al.. (1992). Modelling of catalytic coal hydrogenation in a bubble column reactor: 1. Fundamentals and assumptions. Fuel. 71(6). 673–680. 1 indexed citations

6.

Köpsel, Ralf, et al.. (1992). Modelling of catalytic coal hydrogenation in a bubble column reactor: 2. Model calculations of bubble column cascades. Fuel. 71(6). 681–688. 1 indexed citations

7.

Köpsel, Ralf, et al.. (1990). Catalytic effects of ash components in low rank coal gasification. Fuel. 69(3). 275–281. 23 indexed citations

8.

Köpsel, Ralf, et al.. (1990). Catalytic effects of ash components in low rank coal gasification. Fuel. 69(3). 282–288. 24 indexed citations

9.

Lange, Thomas de, et al.. (1989). Hydrogenation behaviour of a German brown coal1. Influence of pressure, temperature and reaction time. Fuel. 68(3). 361–365. 7 indexed citations

10.

Lange, Thomas de, et al.. (1989). Hydrogenation behaviour of a German brown coal2. Non-isothermic kinetics. Fuel. 68(3). 366–370. 4 indexed citations

11.

Schwabe, K., et al.. (1964). Über kohleelektroden für die elektrochemische reduktion von sauerstoff. Electrochimica Acta. 9(4). 413–423. 4 indexed citations

12.

Köpsel, Ralf, et al.. (1960). Extraktive Aufarbeitung bestrahlter Kernbrennstoffe. 2 indexed citations

Rankless uses publication and citation data sourced from OpenAlex, an open and comprehensive bibliographic database. While OpenAlex provides broad and valuable coverage of the global research landscape, it—like all bibliographic datasets—has inherent limitations. These include incomplete records, variations in author disambiguation, differences in journal indexing, and delays in data updates. As a result, some metrics and network relationships displayed in Rankless may not fully capture the entirety of a scholar's output or impact.

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